80results about How to "Extend the natural vibration period" patented technology

The invention discloses a three-dimensional composite friction pendulum vibration isolator based on a nonlinear energy trap. Structural vibration frequency is staggered away from seismic oscillation dominant frequency and a large amount of seismic oscillation input energy is absorbed by using the characteristics of attenuation and absorption of vibration energy, absorption of vibration frequency bandwidth and the like existing in the nonlinear energy trap as well as a vertical vibration isolation disk-shaped spring, so that the multi-dimensional seismic response of a structure is reduced, and seismic hazards of building structures are prevented. The three-dimensional composite friction pendulum vibration isolator comprises a metal sliding sleeve, a disk-shaped spring, a polytetrafluoroethylene sliding joint, a nonlinear energy trap and pile caps, wherein the disk-shaped spring is arranged in the metal sliding sleeve; the polytetrafluoroethylene sliding joint is arranged on the disk-shaped spring; the polytetrafluoroethylene sliding joint is in relative sliding contact with an upper pile cap through a polytetrafluoroethylene coating; the side face of the nonlinear energy trap is connected with the disk-shaped spring through a rigid spring; the nonlinear energy trap is in rolling contact with a lower pile cap through a rolling shaft; sliding surfaces of the upper and lower pile caps are spherical surfaces. The three-dimensional composite friction pendulum vibration isolator is used for resisting possible violent earthquakes.

The invention mainly discloses a pulling-resistant bidirectional sliding friction bearing applied to the field of bridge, flume and building engineering. The bearing comprises upper and lower bearing plates, upper and lower sliding blocks, a pulling-resistant system and a limiting pulling-resistant device, wherein the upper sliding block and the lower sliding block can horizontally slide on the upper bearing plate and the lower bearing plate respectively; and a pulling-resistant disc is embedded into a pulling-resistant spherical segment. In the state of a normal load and a small earthquake, the rotation between the pulling-resistant disc and the pulling-resistant spherical segment of the bearing adapts to that of an upper structure under the temperature and the normal load; in the state of a big earthquake, the vibration cycle of a structure system can be changed and the partial earthquake energy can be dissipated by the sliding movement of the sliding block so as to reduce the earthquake response of the upper structure; the pulling-resistant system can be used for preventing the upper structure from being overturned or collapsed due to a pulling force with the control effect caused by larger vertical ground motion component under the action of a near field and a near-fault earthquake; and the bearing is strong in pulling-resistant capability and good in durability, has a definite seismic mitigation and absorption mechanism, and is suitable for various structures such as bridges, flumes, buildings and the like with high seismic performance requirements.

The invention relates to a bottom double composite section steel shear wall with a reinforced concrete frame and an inside-hidden steel plate as well as a manufacturing method. The shear wall comprises a steel reinforced concrete composite frame column, a mild steel energy-consuming steel plate and a shear wall steel plate, which is a double composite column comprising the composite of the externally-adhered mild steel energy-consuming steel plate and a concrete filled steel tube column and the composite of the concrete filled steel tube and a reinforced concrete column and is a multiple combination body comprising the combination of a reinforcing bar and concrete, the combination of a steel plate and the concrete and the combination of a steel reinforced concrete frame column and a steel plate shear wall. Compared with a conventional shear wall, the shear wall provided by the invention has the advantages of high initial stiffness, high bearing capacity, slow bearing capacity and stiffness attenuation, good whole anti-seismic energy-consuming performance and relatively stable later-stage anti-seismic performance; the bottom shear-slip damage is little; and after a mild steel casing pipe is added, the outer mild steel casing pipe is firstly surrendered so as to consume the energy in the structure input by earthquake and can give play to the effects of resistance and ductility till being destroyed, therefore, the premature damage and destroy of the high-strength steel plate can be prevented and delayed.

An anti-pullhigh damping rubber vibration isolating support belongs to the technical field of vibration isolating supports. The vibration isolating support is constituted of upper and lower connecting plates, upper and lower seal plates, a high damping rubber support body, an anti-pull connecting body and bolts, wherein the bolts are connected between the upper and lower connecting plates and the upper and lower seal plates; the middle portion of the anti-pull connecting body is in contact with but not connected to the upper and lower seal plates; and the contact surface is smeared with polytetrafluoroethylene for realizing free slide at the horizontal direction. The anti-pull high damping rubber vibration isolating support is suitable for the requirement of a building structure to deform under the effect of normal load; the self rigidity and damping property of the anti-pull high damping rubber vibration isolating support can meet the requirement of different vibration-resisting performances; especially, in rarely met earthquakes, the support provided herein has anti-pull performance, thus the support can resist the vertical pull force; and the support structure has the advantages of simple structure, strong bearing capacity at the vertical direction, large horizontal displacement, good durability and strong capacity to resist pull force, thus the support is suitable for buildings with high requirement to high anti-pull performance at the vertical direction.

The invention relates to a novel swing self-reset bridge pier with an energy dissipation device and an application thereof, belonging to the technical field of anti-seismic and seismic mitigation andisolation of bridges. The novel swing self-reset bridge pier with the energy dissipation device comprises a cap beam (1), a pier body (2), a bearing cap (3), pile foundations (4), prestressed steel bars (6) and shear anchor bolts (7). The bearing cap (3) is anchored to the ground through the pile foundations (4), and the cap beam (1) is anchored to the bearing cap (3) through the pier body (2), the prestressed steel bars (6) and the shear anchor bolts (7). The novel swing self-reset bridge pier with the energy dissipation device further comprises a tension-compression combined energy dissipation device (5) and the tension-compression combined energy dissipation device (5) is installed and fixed at the junction of the bottom of the pier body (2) and the top surface of the bearing cap (3). The swing self-reset bridge pier has the obvious advantages of no damage after earthquake, small residual deformation and recoverable structure.

The invention relates to a pulling-resistant friction isolation bearing for a bridge. The pulling-resistant friction isolation bearing comprises upper and lower bearing plates, upper and lower sliding bodies, a slider and a pulling-resistant housing, wherein the concave curved surface of the upper bearing plate is connected with the upper convex curved surface of the upper sliding body; a metal plate is arranged on the concave curved surface of the lower bearing plate; the concave curved surface of the lower bearing plate is connected with the lower convex curved surface of the lower sliding body; the upper sliding body is connected with the lower sliding body through the slider in the middle; the upper sliding body, the slider and the lower sliding body are arranged in the pulling-resistant housing; and the two side surfaces of the upper sliding body and the lower sliding body are connected with the inner wall of the pulling-resistant housing. The pulling-resistant friction isolation bearing adapts to deformation of the bridge under the action of a normal load, has the characteristics of rigidity and damping adaptivity, is strong in vertical pulling-resistant capability, meets the seismic performance requirements of the bridge under different fortification levels, is simpler in structure, high in vertical bearing capacity, large in horizontal displacement and good in durability and pulling resistance, and is suitable for the bridge with high seismic performance requirements.

The invention relates to a steel tube concrete frame inbuilt steel plate shear wall with soft steel sleeves at the bottom and a producing method of the steel tube concrete frame inbuilt steel plate shear wall. The steel tube concrete frame inbuilt steel plate shear wall is composed of a steel tube concrete frame column, a soft steel sleeve and a shear wall steel plate. The steel tube concrete frame inbuilt steel plate shear wall with the soft steel sleeves at the bottom, disclosed by the invention, is a multi-combination body of a combination of reinforcing steel bars and concrete, a combination of the steel plates and concrete as well as a combination of the steel tube concrete frame column and the steel plate shear wall. The steel tube concrete frame inbuilt steel plate shear wall with the soft steel sleeves at the bottom, disclosed by the invention, has greater initial rigidity, higher bearing capability, slower attenuation of the bearing force and the rigidity as well as better integral quake-proof energy consumption performance than those of the traditional shear walls and has relatively steady earthquake resistant capability in a later stage as well as relatively light shear sliding damage at the bottom. After the soft steel sleeves are additionally arranged, the soft steel sleeve at the outer side is firstly yielded to consume energy of an earthquake input structure and can play resistance power and ductility functions even when the soft steel sleeve at the outer side is damaged, so that previous damage and destruction of the high-intensity steel plate can be prevented and delayed.

The invention discloses a three-dimensional shock-isolation support with a rotating function, which includes a horizontal shock-isolation device, a vertical shock-isolation device and an upper cover; the vertical shock-isolation device includes a disc spring shock-isolation assembly and a coil spring shock-isolation assembly, Disc spring isolation assembly includes disc spring guide tube and disc spring group; coil spring isolation assembly includes coil spring guide tube and coil spring group; the lower end of the disc spring guide tube is connected to the horizontal isolation device, and the upper end extends into the upper cover Viscous damping material is arranged in the central casing and between the two; the lower end of the disc spring group abuts against the horizontal vibration isolation device, and the upper end abuts against the ring flange at the opening of the central casing; the lower end of the coil spring guide tube is connected to the horizontal vibration isolation device. The upper end of the device extends into the edge casing of the upper cover; the lower end of the coil spring group abuts against the horizontal vibration isolation device, and the upper end abuts against the annular flange at the opening of the edge casing. The invention has simple design, clear force, can isolate horizontal direction and vertical direction earthquake, and has a certain rotation function at the same time.

The invention relates to a three-dimensional shock absorbing and isolating device and a mounting construction method thereof. The three-dimensional shock absorbing and isolating device comprises a laminated rubber horizontal shock isolating pad arranged on the upper portion and a laminated polyurethane rubber vertical shock absorbing pad arranged on the lower portion; the upper end of the horizontal shock isolating pad is connected with the lower end of an upper buttress through fixing bolts; the lower end of the horizontal shock isolating pad is connected with the upper end of the vertical shock absorbing pad through fixing bolts; and the vertical shock absorbing pad is connected with the upper end of a lower buttress through fixing bolts. According to the three-dimensional shock absorbing and isolating device and the mounting construction method thereof, the manufacturing technology is simple, processing and forming are facilitated, and the cost is low; the size is small, the weightis low, and transportation and mounting are facilitated; and the horizontal shock isolating and vertical shock absorbing effects are significant, under the premise that vertical small deformation is guaranteed, the vertical earthquake action of a superstructure is effectively reduced, meanwhile, a damper can also achieve the vertical shock absorbing action, and the vertical shock absorbing capacity is greatly improved.

A variable friction-type spherical surface-cylindrical surface friction-type support relates to a friction-type support, which is designed to solve the problems that resonance is produced by a structure and that structural seismic response is increased due to rigidity and constant damping of the existing friction pendulum support, wherein a slide groove is mounted on an upper end face of a connection steel plate; a slide block is located inside the slide groove; an upper portion of the slide block is a hemisphere shape; a hemisphere recess cooperated with the slide block is processed in the middle position of a lower end of an end cover; the end cover is supported on an upper end face of the slide groove through the slide block; an outline of the left half portion of the slide groove is shaped as a rectangle and the outline of the right half portion of the slide groove is shaped as a semicircle; a cylindrical groove is processed on the left half portion of the slide groove; a spherical recess is processed on the right half portion of the slide groove; a cambered surface radius of the cylindrical recess is set in a same way with the cambered surface radius of the spherical recess; the cylindrical recess and the spherical recess are connected in a smooth transitional way to form a complete slide surface; the upper end face of the slide groove is divided with at least two concentric circles in order from the center to the outside; and the friction coefficient at the concentric circle position from inside to outside is sequentially increased. The variable friction-type spherical surface-cylindrical surface friction-type support is used for vibration insulation for a large-span space structure.

The invention discloses a simulation demonstration device for the seismic mitigation and absorption technology. The device comprises a vibrating table, a seismic isolation pad, an upper pedestal and asupporting column. A base is arranged at the bottom of the vibrating table. A vibrating table placement platform is arranged at the top of the vibrating table. The top of the vibrating table placement platform is provided with a buffering plate. The top of the buffering plate is provided with a fixed plate. Two groups of seismic isolation tables are fixed on the upper surface of the fixed plate through the seismic isolation pad. A fixed column, extending into the interior of the fixed plate, is arranged on the seismic isolation pad. The top of the seismic isolation pad is provided with a model pasting plate through a seismic isolation structure. The tops of the seismic isolation tables are fixedly provided with building models. The device is simple in structure and low in cost. The building models can be diversified and can be simultaneously placed in a plane for simulation purpose. Therefore, the effect of the seismic mitigation and absorption technology, the knowledge of earthquakehazards and the knowledge of disaster prevention and disaster prevention can be visually propagandized. The consciousness of the public in preventing disasters and reducing damages can be improved. Bymeans of the vibrating table, the vibration situation of the earthquake can be simulated. Therefore, the effect of contrast experiments is achieved.

The invention relates to a vibration isolating support saddle of self-adaptive double-spherical spring steel plate in the field of building, bridge and aqueduct engineering, comprising an upper support saddle plate, a column upper sliding block, a column biconvex spherical lower sliding block, a sliding disc and a lower support saddle plate; the lower part of the upper support saddle plate is provided with a ring seal plate; the outer wall of the lower part of the upper support saddle plate is connected with the upper surface of the column upper sliding block; a bow spring steel plate elastic subassembly connected with the column upper sliding block is installed between the column upper sliding block on the outer wall of the lower part of the upper support saddle plate and the ring seal plate; the inner concave spherical surface of the column upper sliding block is connected with the upper convex spherical surface of the column biconvex spherical lower sliding block; the lower convex spherical surface of the column biconvex spherical lower sliding block is positioned in the concave spherical surface of the sliding disc; and the convex spherical surface of the sliding disc is positioned in the concave spherical surface of the lower support saddle plate. The support saddle has simple structure, large vertical bearing force, perfect durability and clear vibration isolating mechanism and is fit for buildings, bridges, aqueducts and other buildings with high requirement of vibration resistance property.

The invention discloses an energy-dissipating limiting sliding-friction isolation bearing which is a bridge friction isolation bearing having limiting capacity applicable to the field of bridge engineering. The energy-dissipating limiting sliding-friction isolation bearing comprises an upper bearing plate, a lower bearing plate, an upper slider, a lower slider, a sliding plate and C-shaped metal bars; under a designed earthquake, sliding friction of the sliders between spherical faces of the bearing plates extend self-vibrating period of a structure, and earthquake energy is dissipated throughthe friction in cooperation with the C-shaped metal bars; under the action of a great earthquake, the C-shaped metal bars can provide certain limiting effect. The shape of the C-shaped metal bars provided herein meets the deformation requirement of the bearing during sliding and can avoid stress concentration. The bearing of the invention is simple in structure, has no need for extra damping andlimiting devices and is particularly applicable to bridge structures having limited pier-top space.

The invention discloses a concrete-filled steel tube column provided with a soft steel bushing and embedded with a high-tenacity material. The concrete-filled steel tube column comprises an inner pipe (1), core concrete (2), a soft steel bushing (3), bolts (4) and a high-tenacity composite material (6). In the invention, the bottom of an ordinary concrete-filled steel tube is provided with the soft steel bushing (3); and the high-tenacity composite material (6) is embedded into the space between the soft steel bushing (3) and the inner pipe (1). Under the action of conventional earthquake, the bottom soft steel bushing and an concrete-filled steel tube column have high overall working performance, high rigidity and high strength; and under the action of rare earthquake, shearing damage to the bolts is severe, the connection between an inner pipe and an outer pipe is weakened, the co-working performance degenerates, the ductility and energy consumption functions of the inner pipe and the outer pipe are brought into full play respectively, the overall regality is reduced, the structural period is prolonged, and the earthquake action is reduced; and after the soft steel bushing is arranged, an earthquake fortification line is increased, the structural safety is enhanced, and early impairment and damage to a high-strength steel plate are prevented and delayed.

The invention discloses a friction pendulum connected fabricated steel structure system and a design method thereof. The friction pendulum connected fabricated steel structure system comprises at least two layers of steel frame structures and a group of friction pendulum shock isolation devices; steel columns of each layer of steel frame structure are disconnected at the joint with the lower floor; the friction pendulum shock isolation devices are correspondingly arranged between the steel columns of every two layers of steel frame structures; each friction pendulum shock isolation device comprises an upper connection plate and a lower connection plate; the middles of the bottom surfaces of the upper connection plates are connected with plugging blocks; the bottom surfaces of the pluggingblocks are convex curved surfaces which are convex downwards; lugs are arranged on the top surfaces of the lower connection plates; plugging slots are formed in the tops of the lugs; the bottom surfaces of the plugging slots are concave curved surfaces which are concave downwards; the plugging blocks are correspondingly plugged in the plugging slots; the tops of the plugging blocks are higher thanthe tops of the plugging slots; and distances are reserved between the side walls of the plugging blocks and the side walls of the plugging slots. The friction pendulum connected fabricated steel structure system is capable of solving the technical problems that the existing fabricated steel structure buildings are complicated in connection joints, large in field workload and low in constructionefficiency, the joints of the frame structures are rigidly connected and the seismic resistance of the frames is relatively bad are solved.

The invention discloses a steel tube concrete frame inbuilt steel plate core cylinder with soft steel sleeves at a bottom. The steel tube concrete frame inbuilt steel plate core cylinder is composed of a steel tube concrete frame column, a soft steel sleeve and a steel plate concrete shear wall. The steel tube concrete frame inbuilt steel plate core cylinder with the soft steel sleeves at the bottom, disclosed by the invention, is a three-combination body of a combination of reinforced steel bars and concrete, a combination of steel plates and concrete as well as a combination of the steel tube concrete frame column and the steel plate shear wall. The steel tube concrete frame inbuilt steel plate core cylinder with the soft steel sleeves at the bottom, disclosed by the invention, has greater initial rigidity, higher bearing capability, slower attenuation of the bearing force and the rigidity as well as better integral quake-proof energy consumption performance than those of normal reinforced concrete cylinders and has relatively steady earthquake resistant capability in a later stage. After the soft steel sleeves are additionally arranged, the soft steel sleeve at the outer side is firstly yielded to consume energy of an earthquake input structure and can play resistance power and ductility functions even when the soft steel sleeve at the outer side is damaged, so that previous damage and destruction of the high-intensity steel plate can be prevented and delayed.

The invention discloses a floating breakwater unit body with a frame provided with thin films with holes. The floating breakwater unit body comprises the cuboid frame formed by twelve edges, and the horizontal top thin film with the holes is laid on the upper end face of the cuboid frame, wherein the top thin film with the holes is connected with the edges. The multiple layers of horizontal lower middle loose thin films with the holes are arranged in the height direction from the upper end face to the lower end face at equal intervals, wherein the horizontal lower middle loose thin films with the holes are connected with the front end and the rear end of the cuboid frame, and the length of the horizontal lower middle loose thin films with the holes is larger than that of the cuboid frame. The perpendicular thin films with the holes are laid on the front end face and the rear end face of the cuboid frame respectively, wherein the perpendicular thin films with the holes connected with the edges. Retaining rings used for splicing and connecting moorings are further arranged at the eight corners of the cuboid frame structure. The floating breakwater unit body is good in wave eliminating effect, small in structure restoring force, capable of well shielding long waves and short waves, convenient to construct and maintain and suitable for water areas which have different water depths and are not suitable for the construction of traditional form breakwaters.

The invention discloses a section steel concrete frame inbuilt steel plate core cylinder with a doubly superimposed bottom, which is composed of a section steel concrete superimposed frame column, a power-wasting soft steel plate and a steel plate concrete shear wall. The section steel concrete frame inbuilt steel plate core cylinder with the doubly superimposed bottom is a doubly superimposed column of a superimposition of an externally stuck energy-wasting soft steel plate and a steel tube concrete column as well as a superimposition of the steel tube concrete column and a reinforced concrete column; and the section steel concrete frame inbuilt steel plate core cylinder with the doubly superimposed bottom is a multi-combination body of a combination of reinforcing steel bars and concrete, a combination of the steel plates and concrete as well as a combination of the section steel concrete frame column and the steel plate shear wall. The section steel concrete frame inbuilt steel plate core cylinder with the doubly superimposed bottom, disclosed by the invention, has greater initial rigidity, higher bearing capability, slower attenuation of the bearing force and the rigidity as well as better integral quake-proof energy consumption performance than those of normal reinforced concrete cylinders and has relatively steady earthquake resistant capability in a later stage. After soft steel sleeves are additionally arranged, the soft steel sleeve at the outer side is firstly yielded to consume energy of an earthquake input structure and can play resistance power and ductility functions even when the soft steel sleeve at the outer side is damaged, so that previous damage and destruction of the high-intensity steel plate can be prevented and delayed.

The invention discloses a continuous rigid frame bridge suitable for a high-waterline impoundment reservoir area. The pile type continuous rigid frame bridge can meet the requirements for strength and flexibility without a common pier. The pile type continuous rigid frame bridge comprises a girder, two girder connecting parts and a pile group foundation, wherein the two girder connecting parts stride the girder, the pile group foundation is composed of a set of filling piles, and the filling piles are in rigid connection with the girder connecting parts. The filling piles comprise upper columns and lower columns, wherein the upper columns are connected with the girder connecting parts, and the lower columns are poured into a bed rock. Longitudinal steel bars are arranged on the upper columns after the following carrying capacity limiting condition calculation and the normal using limiting condition calculation are carried out. Longitudinal steel bars are arranged on the lower columns according to the file foundation requirement. Pile transition sections are arranged between the lower columns and the upper columns, and the longitudinal steel bars in the pile transition sections are the same as longitudinal reinforcing bars of the upper columns. The invention further provides a construction method for the pile type continuous rigid frame bridge. The pile type continuous rigid frame bridge has the advantages that the anti-seismic requirement is met, construction is convenient, construction cost is saved, and the construction period is shortened.

The invention discloses a multi-pier system high in durability and resistant to earthquake collapsing and a construction method, and belongs to the field of bridge engineering. The system is mainly composed of a bearing platform, a middle pier, side piers, a prefabricated cover beam and others. All the piers are made from stainless steel tube concrete and prefabricated in a factory, anti-pull rings are arranged at the two ends of steel tubes, and non-bonding prestressed tendons are arranged in the middles of sections. The dimension of the section of the middle pier is larger than that of the side piers on the left side and the right side, and the steel tubes at the boundary positions of the middle pier, the bearing platform and the cover beam are annularly cut off after construction is completed. CFRP is wound around the upper ends and the lower ends of the side piers. According to the structural system, construction advantages of prefabricated structures are utilized, and the risk ofdurability is low in a normal using state. Under a strong earthquake, the middle pier is converted into a rocking-self returning system to prolong a structural natural vibration period without damageto the middle pier; axial bearing capacity of the multi-pier system is provided. Under the strong earthquake, the side piers are similar to steel tube concrete, can provide lateral strength, rigidityand energy consumption capacity, but bear small axial force, and will not collapse and get damaged.

The invention provides a marine ranching device which comprises an upper major structure, a buoyancy structure and a positioning connecting structure. A plurality of functional modules are carried onthe upper major structure, and the buoyancy structure is used for supporting the upper major structure and providing buoyancy for the marine ranching device; the buoyancy structure comprises a plurality of vertical supporting pipes and a plurality of transverse supporting pipes, and the upper ends of the vertical supporting pipes are connected with the bottom faces of the upper major structure. Each transverse supporting pipe is arranged between every two adjacent vertical supporting pipes, the upper end of the positioning connecting structure is connected with the lower ends of the vertical supporting pipes, and the lower end of the positioning connecting structure is positioned at the ocean floor. The marine ranching device has the characteristics that the natural vibration period in a horizontal plane is long and the rigidity is small, the horizontal motion period range of the marine ranching device is much larger than the period range of the wave load, and thus even if the marine ranching device is under a deep sea severe environment condition, the good motion response is obtained.

The invention relates to a horizontal swing type shock insulation support with a beam falling prevention function, which comprises an upper sliding plate, an upper support plate, a spherical crown lining plate and a lower support plate which are sequentially arranged from top to bottom, and sliding friction pairs are arranged between the upper sliding plate and the upper support plate, between the upper support plate and the spherical crown lining plate and between the spherical crown lining plate and the lower support plate; a circular sinking groove is formed in the lower surface of the upper sliding plate, a circular clamping tenon in clearance fit with the circular sinking groove is arranged on the upper surface of the upper support plate, and the circular sinking groove and the circular clamping tenon are eccentrically arranged. The problems that in the actual working process of an existing support, shock absorption and isolation of upper and lower structures of a building cannot be achieved, and a multi-direction movable support cannot reasonably limit the relative displacement range between the upper and lower portions of the support and between the upper and lower structures of a bridge (or the building) and the like are solved.

The invention provides an assembly type concrete beam column joint with a damping device, and belongs to the field of architectural and civil engineering. By means of butt joint of groove holes reserved in upper and lower columns and prefabricated T-shaped beams, prefabricated reinforced concrete columns and prefabricated reinforced concrete T-shaped beams are reinforced through L-shaped reinforcing steel plates and special-shaped reinforcing steel plates. In-column external extending steel pipes and in-column external extending main ribs penetrate through the prefabricated reinforced concretecolumns to enhance the bending resistance and pressure resistance of a beam column, and damping supporting rods are arranged between the prefabricated reinforced concrete columns and the prefabricated reinforced concrete T-shaped beams. The prefabricated concrete beam column joint is convenient to construct, the manufacturing cost is reduced, the construction speed is high, and the overall structure accords with the principle that the columns are strong, the beams are weak, joints are strong and components are weak. The structure has multiple damping protection lines and has necessary strength and good deformation performance and energy-dissipating capacity, the structure is easy to connect, the overall stability is high, and joint connection portions can be reinforced to adapt to assembly type integrated development.

The invention discloses a connecting joint for an H-section steel partially encased recycled concrete composite column and an H-section steel girder. The connecting joint comprises the composite column and the H-section steel girder. The composite column comprises H-section steel, a plurality of transverse pull rods welded to flange plates on the two sides of the H-shaped steel in the length direction of the H-section steel, recycled concrete, side plates, a reinforcing plate and an additional plate. A containing cavity formed by an H-section steel web plate and the flange plates is filled with the recycled concrete, and the side plates, the reinforcing plate and the additional plate are welded to the joint of the grinder and the column. The side plates are parallel to the H-section steel web plate. The reinforcing plate is located at one side of the composite column, and the two ends of the reinforcing plate are welded to the side plates respectively. The additional plate is vertically welded to the flange plates of the H-section steel. A web plate of the H-section steel girder and the additional plate are welded, and flange plates of the H-section steel girder and the flange plates of the H-section steel are welded and fixed. According to the connecting joint, the side plates, the additional plate and the connecting plate are additionally welded to the joint of the girder and the column, so that the connecting joint has good ductility, the natural period of vibration of the structure is prolonged, the amplitude is reduced, and earthquake damage is reduced.

The invention discloses a longitudinal elastic constraint multifunctional seismic mitigation and isolation support. The support comprises a lower seat plate; a middle seat plate which is in sliding connection with the lower seat plate and is provided with a first cambered surface; a rotating piece which is located on the middle seat plate and provided with a second cambered surface, wherein the second cambered surface makes contact with the first cambered surface; a first limiting device which is installed on the rotating part and abuts against the middle seat plate to limit the first cambered surface to slide relative to the second cambered surface, wherein the connecting strength of the first limiting device and the rotating part is smaller than a preset threshold value; second limiting devices which are installed on the lower seat plate and located on the two sides of the middle seat plate in the longitudinal bridge direction respectively to limit the sliding distance of the middle seat plate in the longitudinal bridge direction; and a restraining device which comprises a connecting assembly and an elastic piece, wherein the connecting assembly is connected with the lower seat plate and the elastic piece. The support has the longitudinal adjustable limiting function and longitudinal elastic constraint, the anti-seismic property is improved, a telescopic adjuster can be omitted for a large-span bridge, the maintenance workload is reduced, and the construction cost and the operation cost can be saved.

The invention provides a torsion-resistance and shock-absorption support with natural vibration frequency adjustable. The torsion-resistance and shock-absorption support comprises a top plate, a sliding groove and two sets of elastic shock-absorption blocks, wherein a first pivoting part is downwards formed in the middle of the top plate, the sliding groove is opposite to the top plate, a second pivoting part is upwards formed in the middle of the sliding groove, and the first pivoting part is pivoted to the second pivoting part through a pivoting shaft; the shock-absorption blocks are elastically supported and slidably arranged between the top plate and the sliding groove, and the two sets of shock-absorption blocks are located on the two sides of the pivoting shaft respectively. The shock-absorption blocks play a role in vertical shock absorption, and the shock-absorption blocks are matched with the pivoting shaft to achieve the effect of torsional buffering, so that the shock-absorption performance is greatly improved; the shock-absorption blocks are arranged in the sliding groove in a sliding mode, the position of the shock-absorption blocks in the sliding groove is adjusted tochange the distance between the shock-absorption blocks and the pivoting shaft, and then the rotation rigidity of the shock-absorption support is changed. Therefore, the shock-absorption effect can be greatly improved, and the rotating rigidity and the shock-absorption performance can be adjusted according to the actual condition of transportation materials.

The invention provides a trigger type limited negative stiffness high-strength spring damping support. The trigger type limited negative stiffness high-strength spring damping support comprises an upper connecting steel plate, a support upper-layer structure, supporting columns, a spring combination, a rubber support layer and a lower connecting steel plate. The support upper-layer structure is arranged at the top end of the upper connecting steel plate; and the supporting columns are perpendicularly hinged to the upper connecting steel plate and the lower connecting steel plate, the rubber layer support is installed between the upper connecting steel plate and the lower connecting steel plate, and the spring combination is perpendicularly anchored to the upper connecting steel plate and the lower connecting steel plate and hinged to the upper connecting steel plate and the lower connecting steel plate to form a ''K-shaped'' combined component. The damping support has beneficial effects that an enough bearing force is provided when an earthquake magnitude is low, negative stiffness performance is triggered when the earthquake magnitude is large, the negative stiffness and a commonpositive stiffness shock insulation support are combined in parallel, a total hysteretic curve is full, a shock insulation layer has a large damping ratio, a displacement response of structural vibration is effectively reduced, and an ideal shock insulation effect is achieved.

The invention relates to a joint bar through type prefabricated circular hole plate wall seismic isolation structure. The structure is of a multi-layer assembly type structure and sequentially comprises a structural bottom plate, a vibration isolation layer floor slab and a plurality of standard layer floor slabs from bottom to top, wherein prefabricated circular hole plate walls serve as wall faces between the floor slabs, every two adjacent prefabricated circular hole plate walls are horizontally connected through a soft cable structure, slurry is poured between the two adjacent prefabricated circular hole plate walls, the upper prefabricated circular hole plate wall and the lower prefabricated circular hole plate wall are vertically connected through a through joint bar, slurry is poured between the upper prefabricated circular hole plate wall and the lower prefabricated circular hole plate wall, the upper portion of the joint bar is fixed through a positioning mold, the top of the first-layer wall is connected with a seismic isolation layer floor through thick steel plates and seismic isolation supports, and the thick steel plates are fixed in a closed mode, so that the integrity of the first-layer wall top horizontal components is enhanced. The novel structure system is light in weight, suitable for standardized production, convenient to transport, convenient and fast to assemble, good in shock insulation performance, firm in overall structure, low in cost, fast to construct and safe in structure.

The invention discloses a DVOR (Doppler Vor) omnidirectional range reflective net antenna damping system. A damping support I is arranged between an upper strut and a lower strut of a reflective net bracket, a damping support II is arranged between a reflective net and an antenna orbit, and the two damping supports are high-damping rubber gaskets with built-in gasket lined steel plates. The system is reasonable in design and convenient to install, and is easy to replace when the rubber is aged after installation; the damping support I is arranged between a steel girder and the orbit, so that contact between meshes and the orbit is radically avoided, and the trample problem during overhauling or construction is solved; the damping supports serving as dampers consume energy inside, thus effectively counteracting the influence of wind load on an orbit antenna under severe weather and reducing the vibration frequency and times of the antenna orbit; the antenna orbit is effectively separated from the reflective net steel girder, thus avoiding resonance caused by the same frequency with the reflective net; and the damping support II prolongs the natural vibration period of the structure and reduces the vibration frequency of the structure without influencing the structural strength.

This invention relates to a hard shell pumice concrete and light block, and their preparation. First immerse the pumice to water saturation; then dry the wet pumice, to reach surface dry; add sand, cement, water, additives in the mixer for agitation; add the pre-humid pumice in the mixer for continues agitation; the pumice after agitation and wrap carries out nature maintenance then gain hard shell pumice; at last use water to mix the cement, fine bone power and hard shell pumice to produce hard shell pumice concrete. The hard shell closes orifice of the pumice surface, increase the strength, and improve its surface roughness. It reduces cement consumption, in particular prevents cement mud being sucked into holes, reduces the density of concrete, reduce the thermal conductivity, and increase noise insulation properties. The hole of light block is designed as Oval. Because paving starch easily, so improve the lime linking quality, and reduce influence of the construction factors on the wall force-resistant and strength and incubation properties.