116results about How to "Prevent local buckling" patented technology

The invention relates to a shear hysteretic damper, which comprises an upper rigid connecting plate and a lower rigid connecting plate which are connected with a building structure, a hysteretic energy-consuming web plate, and a flange plate, wherein the rigid connecting plates and the flange plate are fixedly connected to the hysteretic energy-consuming web plate. At least one side of the hysteretic energy-consuming web plate is provided with transverse stiffening ribs or/and longitudinal stiffening ribs. The flexibility-fineness ratio parameter of the hysteretic energy-consuming web plate is between 0.2 and 0.5, the plate thickness ratio of the flange plate to the web plate is not less than 4, the rigidness ratio of the stiffening ribs is not less than 3.0, and the shape factor is between 0.5 and 1.5. The hysteretic energy-consuming web plate is made of rolled steel the yield strength of which is not more than 235MPa, the flange plate and the rigid connecting plates are made of the rolled steel the yield strength of which is not less than 235MPa, and the stiffening ribs are made of the rolled steel the yield strength of which is not less than 235MPa. The shear hysteretic damper has the advantages of simple structure, stable performance, low manufacture and maintenance cost, small space occupation ratio, easy space distribution, replacement after an earthquake and the like.

The invention is a variable section conversion node for profiled steel concrete framework-steel support structure, interconnecting in-pillar profiled steel, in-beam profiled steel, steel support, in-pillar reinforced concrete and in-beam reinforced concrete and pouring then into an organic whole, where the steel support is orthogonally connected with in-pillar an in-beam profiled steel flange plates by section conversion, the web of the in-beam profiled steel in the node connection position is converted into heightening variable section web and the top surface of the heightening variable section web is welded with widening variable section upper wing plate, the bottom surface of the heightening variable section web is welded with widening variable section lower wing plate; the shape of the steel support in the node connecting position is converted into structure of variable section node conversion region and two flange plates of the steel support in variable section conversion region are orthogonally connected with the in-pillar and in-beam profiled steel respectively. And the invention intensifies fore bearing performance of node regions of the profiled steel concrete framework-steel support structure and ability of cooperating of profiled steel and reinforced concrete.

The invention discloses a U-shaped steel-encased regenerated composite beam and a construction method thereof. The U-shaped steel-encased regenerated composite beam comprises one or more disused concrete blocks, new concrete, and U-shaped encased steel, the disused concrete blocks are arranged inside the U-shaped encased steel, and the gap between the disused concrete block and the U-shaped encased steel is filled with the new concrete. The method includes the following steps: the U-shaped encased steel is made as the formwork of a beam and is integrated with the formwork of the floor slab or roof slab; a layer of new concrete is first poured into the U-shaped encased steel, then the disused concrete blocks and new concrete are alternately put into the U-shaped encased steel, tamping is utilized then to distributed the disused concrete blocks into the new concrete; steel bars of the floor slab or the roof slab are put into the formwork of the floor slab or the roof slab, and the new concrete is poured into the formwork of the floor slab or the roof slab. The invention can save a great amount of energy consumed in the processes of breaking, screening, purifying and the like for the concrete waste.

The invention discloses a shear-type stiffened metal damper, which comprises an energy-dissipating steel plate, stiffening ribs are respectively arranged on the left and right sides of the energy-dissipating steel plate, horizontal connecting steel plates are respectively arranged on the upper end and the lower end of the energy-dissipating steel plate, Flange plates are arranged at the front end and rear end respectively, the stiffeners on the left side and the right side of the energy dissipation steel plate are arranged symmetrically or asymmetrically, and the stiffeners on the same side of the energy dissipation steel plate are arranged without crossing. The invention utilizes the advantages of relatively large initial rigidity when the steel plate is stressed in the plane, and prevents the buckling of the energy-dissipating steel plate by means of stiffening, thereby ensuring the energy-dissipating capacity and stability of the damper; There are no cross welds, and the stiffeners can be set in full length without truncating, which is convenient for welding, and the welding quality is easy to guarantee.

The invention relates to a steel pipe concrete flange combining beam with a concrete fender. A web is arranged in the length direction of a lower fender; the front surface and the back surface of the web are provided with stiffening ribs; the upper end of the web is provided with a steel pipe concrete upper flange formed by pouring self-compacting concrete in a steel pipe; and the upper end of a rectangular steel pipe concrete upper flange is provided with a concrete upper fender. The steel pipe of the rectangular steel pipe concrete upper flange is a rectangular steel pipe, and the cross section is in a rectangular annular shape. The web is in a trapezoidal waveform or sinusoidal waveform or planform shape. The invention can replace the traditional hot rolling I-steel and H-steel combining beam and a welding I-steel combining beam, has the advantages of convenient construction, light deadweight, large bearing capacity, high torsion rigidity, high ductility, and the like, is a combining structure which can fully exert the advantages of two materials of structural steel and high-performance concrete and has favorable application prospect in bridge and structure engineering.

The invention discloses a fiber reinforced plastics-steel composite pipe restricted structural steel high-strength concrete column, which comprises longitudinal bars, hoopings, high-strength concrete, a structural steel and a fiber reinforced plastics-steel composite pipe; the longitudinal bars are distributed in the height direction of the column, the circular hoopings are sleeved in the height direction of the longitudinal bars, the structural steel is distributed in the hoopings along the height direction of the column, and the fiber reinforced plastics-steel composite pipe is sleeved outside of the hoopings in the height direction of the column; the fiber reinforced plastics-steel composite pipe is composed of a steel pipe used as an inner wall and a fiber reinforced plastics pipe used as an external wall, high-strength solid concrete is poured in the fiber reinforced plastics-steel composite pipe, and the fiber reinforced plastics-steel composite pipe is broken at two ends of the column. With the column provided by the invention, the axial compression ratio and the seismic performance of the structural steel high-strength concrete column are improved, and the endurance quality of the steel pipe restricted structural steel high-strength concrete column is also improved; and problems, such as high dosage of steel, troubles in connection with reinforced concrete beams, and the like, of the steel pipe structural steel high-strength concrete column are solved.

The invention discloses an anti-buckling steel plate seismic shear wall provided with stiffening ribs. The anti-buckling steel plate seismic shear wall comprises a steel plate wall, horizontal stiffening ribs, vertical stiffening ribs, steel columns and steel girders, wherein the steel plate wall is arranged in a frame formed by the steel columns and the steel girders, and the multiple horizontal stiffening ribs are uniformly fixed on two side wall surfaces of the steel plate wall at vertical intervals and horizontally welded on the steel plate wall; the multiple vertical stiffening ribs are fixed between the horizontal stiffening ribs at horizontal intervals and are vertically arranged, and upper ends and lower ends of the vertical stiffening ribs are welded with the horizontal stiffening ribs; a gap is reserved between each vertical stiffening rib and the steel plate wall. According to the anti-buckling steel plate seismic shear wall provided with the stiffening ribs, overall buckling and local buckling of the steel plate wall can be prevented, so that the steel plate wall can only yield, and the shear capacity and the severe earthquake energy dissipation performance of the steel plate wall are improved; the anti-buckling steel plate seismic shear wall is simple in structure and reasonable in stress, can bear horizontal force under the action of the earthquakes, and is convenient to construct and high in degree of industrialization.

The invention relates to a connecting node of a beam and a column of building steel structures, in particular to a connecting node of a square steel pipe column and H-shaped steel beams for multi-layer and high-rise steel structures. The connecting node comprises a square steel pipe column, H-shaped steel beams and T-shaped steels; the T-shaped steels are arranged on the lateral wall of the square steel pipe column and the upper and lower wing edges of the H-shaped steels; webs of the T-shaped steels are connected with the wing edges of the H-shaped steel beams; and the wing edges of the T-shaped steels are fixedly connected with the lateral walls of the square steel pipe column. According to the connecting node of the square steel pipe column and the H-shaped steel beams, the connecting node is simple in structure, and the problem of construction difficulty in installing an internal separating plate is solved; a plastic hinge shifts outwards and better shock-absorbing property is achieved; the construction of an upper floor and the casting of concrete in the square steel pipe are not influenced; and the steel consumption is low. Therefore, the connecting node has high economic and social benefits.

The invention provides a connecting joint of a prefabricated steel pipe restraining reinforced concrete pier and a bearing platform and a construction method thereof. The connecting joint connects a prefabricated bridge pier and a bearing platform. The prefabricated bridge pier includes a steel pipe joint, an upper steel pipe and concrete. The steel pipe joint includes a lower steel pipe, a perforated steel plate and a connecting steel plate. The upper steel pipe is arranged above the lower steel pipe. The construction method of the connecting joint includes manufacturing a steel pipe joint, arranging longitudinal steel bars, pouring bridge pier concrete, hoisting a prefabricated pier and pouring filling concrete and the like. The connecting joint simplifies the formwork process. The construction speed is fast. The construction quality is improved. The construction environment is improved. The labor cost and the construction cost are saved. The bearing capacity of the connecting jointof the prefabricated pier and the bearing platform is improved on the basis of ensuring that the outer-wrapped steel pipe does not bear vertical load and greater lateral binding force on the core concrete is provided.

The invention discloses an effective load space cabin structure applicable to an orbiter, comprising a cabin body and cabin doors; the cabin doors are connected to the cabin body; the cabin doors can open and close the cabin body; the cabin doors are two symmetrical opposite-opening structures, and every cabin door comprises an inner skin, an outer skin, main force bearing beams, honeycomb cores, a reinforcing rib and a heat protecting structure; the honeycomb cores are located between the inner skin and the outer skin; a guide flow slot is arranged on a contact position of the honeycomb cores and the outer skin, the reinforcing rib is arranged between the honeycomb cores, and connected to the main force bearing beams; three cabin door locks are evenly distributed on the main force bearing beams, the two cabin doors are locked to each other in the process of closing; the thermal protecting structure is arranged on the outer skin, and arranged in a staggering manner; the vapor return absorption of the surface of the thermal protecting structure under the natural environment is not more than 0.15%, thus the effective load cabin door structure is high in structural rigidity, good in structure compatibility and sealing property; meanwhile, the effective load space cabin structure can meet integration and lightweight requirements at the same time.

The invention discloses a hollow-sandwich multi-cavity steel pipe concrete member and a preparation method thereof. The hollow-sandwich multi-cavity steel pipe concrete member comprises an internal steel pipe and an external steel pipe which are concentrically placed; a space between the internal steel pipe and the external steel pipe is filled with concrete; a plurality of transverse diaphragms are uniformly distributed on the external wall of the internal steel pipe around the axis of the internal steel pipe; each transverse diaphragm is placed along the full length of the internal steel pipe in the axial direction; the external end part of each transverse diaphragm is in clamping connection with a groove formed in the internal wall of the external steel pipe; convex teeth are arranged on the internal wall of the external steel pipe and the external wall of the internal steel pipe; a plurality of shear grooves are uniformly formed in the side surfaces of the transverse diaphragms inthe axial direction; a plurality of external cylinders made of carbon fiber composite materials are bonded outside the external steel pipe in the annular direction; and the external cylinders are notconnected with the end part of the external steel pipe. According to the hollow-sandwich multi-cavity steel pipe concrete member, the corrosion resistance is high, less separation phenomena between the steel pipe walls and the concrete are less, the steel pipes are unlikely to generate local buckling, and the stressed states of the concrete in three directions are uniform.

The invention discloses a composite steel pipe concrete column with a built-in steel pipe beam tube. The composite steel pipe concrete column comprises an outer tube steel pipe, wherein a plurality of inner tube steel pipe concrete columns are arranged in the outer tube steel pipe; each inner tube steel pipe concrete column comprises an inner tube steel pipe; inner tube concrete is filled in the inner tube steel pipe; the inner tube steel pipe concrete columns are connected through connecting lacing elements; a plurality of enhanced bonding ribs are arranged on the inner wall of the outer tube steel pipe; between-pipe concrete is filled between the outer tube concrete pipe and the inner tube concrete columns; The composite steel pipe concrete column with the built-in steel pipe beam tube has the advantages that the carrying force is high; the intensity storage is great; the durability is higher; the cross section dimension and the dead weight of the column component are reduced; the high-intensity materials are sufficiently utilized; the energy sources and the energy sources are saved; the sustainable development requirements are met.

The invention discloses a rectangular steel pipe column-H steel beam full-bolt connection self-rigidity node and a construction method. The node comprises a rectangular steel pipe column, an H-shapedsteel beam and a connection force transmission part; the connection force transmission part comprises an upper rectangular hoop, a lower rectangular hoop, upper unequal limb angle steel, lower unequallimb angle steel and a vertical web connection plate; the upper unequal limb angle steel and the lower unequal limb angle steel comprise unequal limb angle steel short limbs connected with the rectangular steel pipe column and unequal limb angle steel long limbs connected with the flange of the H-shaped steel beam; the upper rectangular hoop and the lower rectangular hoop sleeve the outer sides of the unequal limb angle steel short limbs and are connected with the rectangular steel pipe column through one-way locking high-strength bolts; the vertical web connection plate is located on an H-shaped steel beam web, fixed to the rectangular steel pipe column and connected with the H-shaped steel beam web. The node is reasonable and reliable in force transmission, capable of achieving design standardization and manufacturing standardization, accurate and convenient to install, suitable for assembly-type connection of a square steel pipe column and an H-shaped steel beam structure and is asemi-rigid node with good ductility and high anti-seismic and energy-consumption capacity.

The invention discloses a steering control system of a nine-shaft automobile chassis crane. The steering control system comprises a pull rod type steering transmission mechanism and a hydraulic power-assisted steering system, wherein the pull rod type steering transmission mechanism is used for controlling corresponding wheels on a first steering shaft, a second steering shaft, a third steering shaft, a fourth steering shaft and a fifth steering shaft to steer; the pull rod type steering transmission mechanism comprises a first rocker arm, a second rocker arm and a third rocker arm which are respectively used for controlling the wheels on the corresponding steering shafts to steer through a pull rod assembly; and the pull rod type steering transmission mechanism also comprises a first auxiliary rocker arm and an auxiliary pull rod assembly, the first auxiliary rock arm is arranged between any two adjacent rocker arms in the three rocker arms, and the auxiliary pull rod assembly is used for sequentially hinging the three rocker arms and the first auxiliary rocker arm. By using the steering control system, the condition that parts of the pull rod assembly are overlong is avoided, and the phenomenon that parts of the pull rod assembly is instable and bent can be effectively prevented; and furthermore, the safety performance in operating vehicles is improved on the basis of avoiding the abnormal wearing of a tire. On the basis, the invention also provides a nine-shaft automobile chassis crane with the steering control system.

The invention discloses a novel energyconsuming prefabricated shear wall and a manufacturing and mounting method thereof, and relates to the technical field of prefabricated building construction. Thenovel energyconsuming prefabricated shear wall comprises a reinforced concrete slab, a profile steel energy consuming supportis arranged in the reinforced concrete slab, reinforcing meshes are arranged both in the reinforced concrete slab and at the top and bottom of profile steel energy consuming support, the reinforcing meshes are interwoven by horizontally distributed ribs and vertically distributed ribs, a positioning protrusion is arranged on each of the two sides of the top of the reinforced concrete slab, positioning grooves matching with the positioning protrusions are formed in boththe two sides of the bottom of the reinforced concrete slab, a stirrup and a beam steel are arranged at the top of the reinforced concrete slab, and an anchor steel is arranged at the bottom of the reinforced concrete slab. According to the novel energyconsuming prefabricated shear wall, bearing capacity is high, energy consuming capability is high, construction using the manufacturing and mounting method is convenient and quick, a next layer of prefabricated shear wall can be hoisted without concrete setting, and the construction period is greatly shortened.

The invention discloses a built-in truss combined structure which comprises a combined body. The combined body is composed of steel plates and end columns. A cavity is formed among the end columns and the steel plates. Trusses are arranged in the cavity and fixed to the steel plates in a welded mode. Each truss comprises web members and chord members, wherein the chord members are fixed to the corresponding steel plates in a welded mode. Shear resisting components are arranged on the inner sides of the end columns. Concrete is poured in the cavity. The trusses and the shear resisting components are all arranged in the concrete. According to the built-in truss combined structure, advantages of steel and the concrete are fully achieved, and the structure has an excellent energy-dissipating capacity and a good mechanical property; the trusses are fixed to the steel plates in the welded mode, the steel plates on the two sides are restrained through the trusses, and premature occurrence of local buckling of the steel plates in the construction and use stage is prevented; and meanwhile, the cavity formed by the end columns and the steel plates can serve as a template for concrete pouring, and the construction cost is lowered.

The invention discloses a recycled concrete Z-shaped pier stud, which is formed by welding two steel plates and two round steel pipes respectively with a U-shaped steel groove; ordinary aggregate concrete is cast in the U-shaped steel grooves and between the two parallel steel plates; recycled aggregate concrete is cast in the round steel pipes. The recycled concrete Z-shaped pier stud disclosed by the invention is capable of overcoming the problem that the use of recycled concrete is limited due to the fact that strength and endurance quality are poor and the like, is in favor of popularization and application and engineering garbage recycling of the recycled concrete in bridge engineering, and can be applied to skew bridges in regions with strong seismic intensity and regions that building materials are difficult to transport; for bridges damaged by earthquakes, the damaged bridges can be immediately crushed into the recycled concrete, and natural aggregate is replaced with part of the recycled concrete to repair or rebuild the bridges, so that the transport cost is reduced, and post-disaster reconstruction is advantageously recovered.

The invention discloses an assembled building system based on inner insertion plate and clamping plate connecting beam column nodes. A lower column module comprises lower columns; all the lower columns are provided with first support plates, outer extension plates and inner insertion plates; an upper column module comprises upper columns; all the upper columns are provided with second support plates; the upper columns are correspondingly inserted in the inner insertion plates of the lower columns, and are connected through bolts; a beam module comprises a main beam and a secondary beam; wire passing holes are reserved on web plates of the main beam and the secondary beam; and the connection of all the modules is realized through bolts among the main beam web plate, the outer extension plates and clamping plates, between a main beam lower flange and the first support plates and between a main beam upper flange and the second support plates. Beam columns can be assembled in scene only byadopting bolts, so that the assembly speed is high, and the construction period is shortened. Ribbed support plates achieve a positioning effect on the beams to bear part of the bending moment. The upper and lower columns are conveniently installed by the inner insertion plates to reduce the lifting difficulty. The ribbed support plates and the clamping plates are provided to realize outer shifting of plastic hinges. Pipelines are separated from a main body structure, so that the maintenance is convenient, and the clearance is improved.