247 results about "Seismic loading" patented technology

The invention discloses a self-resetting pier column structural system with a built-in energy dissipation assembly and an implementing method for the self-resetting pier column structural system, and belongs to the field of bridge engineering. The self-resetting pier column structural system consists of a pier column, a bridge abutment, energy dissipation steel bars, non-adhesion prestressed steel bars with an elastic resetting function and an embedded part; in the novel pier column structural system capable of effectively reducing residual deformation and ensuring sufficient energy dissipation, a pier is connected with the bridge abutment through the energy dissipation steel bars and the non-adhesion prestressed steel bars. Compared with the conventional pier column node, the self-resetting pier column structural system has the advantages that: the non-adhesion prestressed steel bars are positioned in the axle center of the pier column, a self-resetting restoring force can be generated, and the problem that the conventional pier has large residual deformation under the action of an earthquake load and cannot serve people any longer can be solved well; the self-resetting pier column structural system is flexible in design and definite in structural stress; the pier is ensured to have sufficient strength and rigidity; and the self-resetting pier column structural system can be implemented by a prefabricating or on-site pouring method, is easy and convenient to construct, and is an advanced and practical novel pier column system.

The invention discloses an external energy-consumption self-resetting bridge pier stud structure system and a realization method thereof, belonging to the field of bridgework. The structure system mainly comprises a bridge pier stud, a bridge abutment, an unbonded prestressed reinforcement, an external energy consumption device, a pier embedded part and a bridge abutment embedded part, wherein the bridge pier stud and the bridge abutment are connected by the unbonded prestressed reinforcement and the external energy consumption device, so that residual deformation can be effectively reduced, and energy consumption can be guaranteed. The external energy-consumption self-resetting bridge pier stud structure system is flexible in design and has specific structure stress. The unbonded prestressed reinforcement on the axis position of the pier stud can be used for generating self-resetting restoring force. The problem that the traditional bridge pier has larger residual deformation and cannot continuously serve after the earthquake loading action is solved. The bridge pier has enough strength and rigidity. The external energy-consumption self-resetting bridge pier stud structure system is realized in a cast-in-situ or prefabricating mode and is easy to construct and is a novel pier stud structure system which is advanced and practical and can realize quick replacement and repair after the earthquake..

A method and apparatus for installing elevator car and counterweight guide rails within an elevator hoistway of a building that requires no welding operations to be performed in order to connect the brackets together. The connector brackets of the invention include cooperating support and connector brackets each having a plurality of strategically arranged, indexable connector holes that permit the necessary degree of adjustment of the brackets to properly position the guide rails within the hoistway. Specially configured connector bolts are provided which impart substantial structural integrity to the interconnected bracket and positively preclude shifting of the interconnected brackets even as a result of projected seismic loading.

This invention relates to a structural cementitious panel (SCP) panel able to resist lateral forces imposed by high wind and earthquake loads in regions where they are required by building codes. These panels may be used for shear walls, flooring or roofing or other locations where shear panels are used in residential or commercial construction. The panels employ one or more layers of a continuous phase resulting from the curing of an aqueous mixture of inorganic binder reinforced with glass fibers and containing lightweight filler particles. One or more reinforcement members, such as mesh or plate sheets, are bonded to at least one surface of the panel to provide a completed panel that can breathe and has weather resistant characteristics to be capable of sustaining exposure to the elements during construction, without damage.

A seismic isolation bearing comprises a lower plate, an upper plate, and a cylindrical roller in rolling contact with an upwardly facing bearing surface of the lower plate and a downwardly facing surface of the upper plate. The lower plate is fixable to a base, while the upper plate is fixable to a superstructure, for example a bridge deck. One or both bearing surfaces are sloped to form a central trough at which the cylindrical roller resides under normal weight of the superstructure, and toward which the roller is biased when relative displacement between the lower and upper plates occurs to provide a constant restoring force. A pair of sidewall members are fixed to the lower plate to withstand strong forces directed laterally with respect to the isolation axis along which rolling displacement occurs, and a pair of sliding guides carried one at each end of the roller provide dry frictional damping as they engage an inner wall surface of a corresponding sidewall member. The isolation bearing preferably comprises a locking mechanism that prevents relative displacement under normal non-seismic horizontal loading, but allows the bearing to function as intended under seismic loading. Visco-elastic or viscous dampers, linear springs, and nonlinear springs such as hardening springs are preferably mounted between the lower and upper plates to reduce bearing displacement, dissipate energy, and otherwise adjust periodic motion characteristics of the bearing. Further embodiments providing isolation along orthogonal X and Y axes are also disclosed.

The invention relates to three-dimensional slope stability prediction method under an earthquake load effect. The method comprises the following steps. Firstly, a specific to-be-predicted slope body is chosen, the three-dimensional sliding surface shape and the geometric dimension are confirmed, three-dimensional surfaces are divided into a slip surface and a side slope surface, and the slip surface and the side slope surface are shown with equations. Secondly, discretization is performed on the three-dimensional slope body. Thirdly, a predicated equation set of three-dimensional slope stability with consideration of the earthquake load effect is set, and last data of a three-dimensional slope stability coefficient is obtained through the equation set. Fourthly, whether the stability coefficient is larger than a set slope stability critical value or not is judged based on the last condition of the stability coefficient and by searching the most disadvantageous condition of the slope under the earthquake load effect. The three-dimensional slope stability prediction method under the earthquake load effect has the advantages that a dynamic effect of earthquake load in a slope engineering is considered, calculation precision is improved, and a predicted result is reliable.

The invention relates to a novel TLD which combines liquid damping and liquid column damping. The novel TLD comprises a water tank, a baffle, a baffle fixing and adjusting device, elastic supports and a hinge device. The novel TLD combines the advantages of a TLD and a TLCD (Tuned Liquid Column Damper), is simple manufacturing and multi-purpose and can improve damping and shock-absorbing effects. According to the novel TLD, the rectangular deep water tank is utilized as a basic model, the middle of the bottom of the water tank is hinged and fixed, and two ends of the bottom of the water tank are provided with the elastic supports. The center of the water tank is provided with the vertically-arranged flat plate, and the length of the flat plate in the liquid inside the tank is adjustable. When wind loads or earthquake loads are in action, liquid in the water tank can generate vibration in a horizontal direction and can also generate liquid level change in the vertical direction, and accordingly the vibration energy loss of the liquid can be increased. The flow condition of the liquid can also be changed by adjusting the height of the flat plate so as to adjust the damping ratio of the liquid damper.

The invention relates to an existing building surrounding type story-adding structure and a construction method thereof, and belongs to the field of structure seismic strengthening. According to the invention, outer covering type steel structures are added on the periphery of an existing building, and the steel structures surround the existing building and are connected end to end on the plane, so that the horizontal seismic load of the whole structures can be effectively increased. According to the invention, when newly added load-bearing type steel columns of the surrounding type structures exceed the top part of the existing building, load-bearing cross beams are arranged and connected with the newly added load-bearing type steel columns. The whole load at the upper parts of the newly added load-bearing cross beams is transmitted to the newly added load-bearing type steel columns and then the foundation. The surrounding type story-adding technology enables the new structures and the old structures to be closely connected in a hinged or rigid manner, so that the structure stability is increased, the stress system of the whole structure is reasonable, and the safety and the reliability of the whole structure are ensured. Through existing building surrounding type story-adding construction, the present problem about housing difficulty of people is solved and meanwhile a great deal of land resource of the nation is saved.

The invention discloses an assembly type recycled concrete node with steel bar truss girders at end parts and a manufacturing method thereof, belonging to the technical field of constructing of prefabricated parts and key nodes and regenerating of concrete. The assembly type recycled concrete node has the advantages of environment friendliness, energy saving and convenience in construction, and is applicable to prefabricated construction, so that the problems that the key nodes of the existing prefabricated parts are poor in seismic performance and severe in seismic hazard, and the defect that the node construction is difficult can be overcome by integrally casting a wing-tip beam and an upright post; and moreover, autoclaved curing prefabrication forming is adopted, so the compactness, the casting quality and the strength of the concrete at the nodes are remarkably improved, thereby realizing an anti-seismic design target of strong nodes and weak rods, as well as connecting the wing-tip beam with the prefabricated beam with the steel bar truss girders by bar splicing. A stirrup strengthening zone is arranged at the connecting part, and the connecting part is set to be a post-cast strip, so that plastic hinges are easily formed under earthquake load action. An ideal failure mechanism with the anti-seismic design concept of strong columns and weak beams, and strong shear and weak bending can be extensively applied to precast construction.

A link-fuse joint resists bending moments and shears generated by seismic loading. A joint connection includes a first plate assembly having a first connection plate including a first diagonal slot formed therethrough. A second plate assembly has a second connection plate including a second diagonal slot formed therethrough. The second diagonal slot is diagonally opposed to the first diagonal slot. The second connection plate is position such that at least a portion of the second diagonal slot aligns with a portion of the first diagonal slot. A pin is positioned through the first diagonal slot and the second diagonal slot. The joint connection accommodates a slippage of at least one of the first and second plate assemblies relative to each other when the joint connection is subject to a seismic load and without significant loss of clamping force.

The invention discloses a prefabricated prestress heat-preservation external wall board, a special mold and a manufacturing method of the external wall board and belongs to the field of building steel structures. The prefabricated prestress heat-preservation external wall board comprises a heat-preservation core board, reinforcement fabrics located on the two sides of the heat-preservation core board and concrete layers poured onto the reinforcement fabrics. A plurality of full-length heat-preservation core board ribs are arranged on the heat-preservation core board, and a plurality of concrete ribs staggered and mutually matched with the heat-preservation core board ribs are arranged on the concrete layers; and a shear-resisting connecting piece connected with the corresponding reinforcement fabric is arranged between every two adjacent heat-preservation core board ribs in a crossed mode, and prestressed tendons are arranged in a groove formed between every two adjacent heat-preservation core board ribs and/or a groove formed between every two adjacent concrete ribs. The prefabricated prestress heat-preservation external wall board is small in self weight, large in stiffness, good in heat-preservation effect, not prone to generating cracks under the wind load and the earthquake load and capable of reducing wet construction at a construction site.

In an earthquake resisting design method of a PC construction, a column and a beam, which are high-strength precast prestress concrete members, is joined by binding juncture with a prestressing tendon. A grout is filled and bonded. A first stage linear resilient design is employed, where all construction members are not damaged, for earthquakes up to a predetermined earthquake load design value. A second stage linear resilient design is employed, where earthquake energy is absorbed by breakage of the bond of the grout, and principal construction members are not damaged, for earthquakes exceeding the predetermined earthquake load design value. By employing a non-linear resilient design in which the first stage linear resilient design and the second stage linear resilient design is combined, an earthquake-resisting design level is significantly increased, the construction can resist earthquakes exceeding a seismic intensity 6 upper.

The invention discloses a self-reset beam-column joint based on SMA bars and a steel structure building, and belongs to the field of buildings. The self-reset beam-column joint comprises steel beams,steel columns, a connecting plate and at least two SMA bars, wherein the middles of one ends of the steel beams and the connecting plate are provided with round bolt holes correspondingly, one end ofthe connecting plate is fixedly connected with the corresponding steel column, the other end of the connecting plate penetrates through the round bolt holes through bolts to be connected with the steel beams, and a space for allowing the steel beams to rotate around the round bolt holes is reserved between the steel beams and the steel columns; and one ends of the SMA bars are fixedly connected with the steel columns, the other ends of the SMA bars are fixedly connected with the steel beams, and the SMA bars are distributed in an up-down symmetrical mode with respect to the round bolt holes. The self-reset beam-column joint has good energy dissipation performance and the self-reset ability under action of the earthquake load, the allowable deformation range is large, the reciprocating loadbehavior is symmetrical, the self-reset beam-column joint cannot lose the initial stiffness under the lower temperature and after being subjected to large deformation, the structure beams, the structure columns and the joint cannot be damaged after an earthquake, the structure is simple, production and mounting are simple and convenient, and economic benefits are high.

The invention relates to a damper with vibration energy dissipated through a soft steel surface internal yield deformation mechanism. The damper is used for energy dissipation and vibration reduction of a house building. An assembly type soft steel damper optimized through an equal-stress line comprises a soft steel energy dissipation piece, an anti-buckling clamping plate, L-shaped connecting plates, anchoring steel plates, a polyfluortetraethylene plate, pre-pressing fastening bolts, friction type high-strength connecting bolts, a limiting bolt, embedded anchoring steel bars and flexible filling materials. The assembly type soft steel damper optimized through the equal-stress line can serve as a dividing element of a building to be installed in a structure and does not bear a vertical load; when the assembly type soft steel damper bears a wind load or an earthquake load, the elastic-plastic hysteretic behavior generated when the soft steel energy dissipation piece deforms dissipates the energy input by the wind load or the earthquake load, and thus main components of the structure are protected; the soft steel energy dissipation piece is optimized through the equal-stress line, so that accumulated plastic deformation of the energy dissipation piece is greatly reduced, and the low cycle fatigue performance of the energy dissipation piece is enhanced.

The invention discloses a dissipative element of a grouting sleeve, comprising an inner tube and an outer tube which are arranged coaxially. The slit between the lap sections of the outer tube and the inner tube is provided with expanding cement slurry, and an expanding cement sheath is formed after the expanding cement slurry is cured. The pretension force of the expanding cement slurry enables the friction force of the contact surface between the expanding cement sheath and the sleeve body to be increased. At normal operating condition, the dissipative element can be used as ordinary support to bear axial loading; with the effect of earthquake loading, the dissipative element consumes and absorbs the earthquake energy by relative sliding of inner and outer tubes. The member has no too high requirement for machining precision, thereby saving steel material and having low cost. After the dissipative element is damaged and inactive in earthquake hazard, the dissipative element of a grouting sleeve is just needed to be replaced and the operation is very convenient.

The invention discloses a multilayer oblique slotted self anti-buckling steel plate shear wall comprising multilayer oblique slotted steel plate shear walls; slot holes of the oblique slots can divide the steel plate shear wall into a plurality of oblique plate strips; the slotting direction of the oblique slots of the same layer steel plate shear wall is same; the oblique slot directions of two adjacent layers of steel plate shear walls are opposite to each other; the two adjacent layers of the steel plate shear walls are bonded through a damping rubber; the surrounding of the multilayer steel plate shear walls is connected with an edge frame; under reciprocating horizontal earthquake load effect, the oblique plate strips of same direction are respectively under unidirectional pulled or unidirectional pressed states; the tension force rigidity of the pulled oblique plate strips in certain layer can provide external-plane support for the pressed oblique plate strips of another layer, thus realizing self anti-buckling effect. The multilayer oblique slotted self anti-buckling steel plate shear wall can serve as a novel bearing dissipating energy type anti-side force member, can effectively reduce lateral deformation of multi-storey high-rise building under horizontal load, thus enhancing dissipating energy capability of the multi-storey high-rise building under earthquake loads.

The invention discloses a grouting reinforcement and earthquake resisting method for an earth and rockfill dam, which includes the technical steps: using a drilling machine to drill holes at certain intervals on the upstream top and the downstream top of a dam in a range from one-quarter dam height to one-fifth dam height during filling of the dam; driving grouting casings for drilling supporting or pre-embedding horizontal grouting casings with holes in real time; injecting polymer materials into the grouting casings through grouting pipes; allowing the polymer materials to chemically react in the grouting casings and quickly swell and allowing the polymer materials to permeate into surrounding rockfill to be cemented with rockfill through voids inside the rockfill; and forming a solid flexible reinforced complex so that cohesion of rockfill complex is increased and seismic resistance of the dam is improved. The method is applicable to newly built earth and rockfill dams, is also applicable to earth and rockfill dams built already, and is fast in construction, the reinforcement is the flexible complex and adaptable to deformation of the dam under the action of seismic load, and good seismic resisting effect is achieved.

The invention provides a method for monitoring the seismic deformation of a building curtain wall based on digital speckle marks, and the method comprises the following basic steps: 1) fixing a test piece frame on an earthquake simulation vibration platform, assembling a to-be-detected curtain wall on the frame, and manually marking speckle patterns with random characteristics on the surface of the curtain wall; 2) erecting two industrial digital cameras to image speckle patterns on the surface of the test piece; 3) fitting artificial seismic waves according to the characteristics of a plannedconstruction site, carrying out graded loading for multiple times, and collecting speckle images at the same time; 4) performing three-dimensional digital image correlation matching calculation of the acquired digital image sequence in a computer to obtain full-field displacement and deformation information of the surface of the building curtain wall under the action of a seismic load. Through the digital speckle image marking and optical measurement method, the quantitative data of the full-field deformation of the curtain wall under the earthquake load effect is obtained, the measurement result is more accurate, the measurement steps are simpler, and the application range is wider.

The invention relates to a spherical multidirectional force measuring support base. The spherical multidirectional force measuring support base comprises an upper support plate, a combined downswing, a base and a plurality of pressure sensors. The bottom surface of the upper support plate is a convex spherical surface, the top surface of the combined downswing is a concave spherical surface, the concave spherical surface is spliced by two identical concave spherical surfaces or four identical concave spherical surfaces, and the upper support plate contacts with the combined downswing in a spherical mode. The pressure sensors in the horizontal direction are arranged between the combined downswing and vertical walls of the base. The spherical multidirectional dynamometric support base can be utilized as supports for bridges, buildings or other engineering structures to measure and monitor various loads including dead load, dynamic load, impact load, earthquake load, additional load caused by temperature variation, and the like.