CN112982729B - Modularized concrete-filled steel tube multidimensional energy dissipation wall with uniformly distributed stress under earthquake - Google Patents
Modularized concrete-filled steel tube multidimensional energy dissipation wall with uniformly distributed stress under earthquake Download PDFInfo
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- 239000000463 material Substances 0.000 claims abstract description 28
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- 239000011150 reinforced concrete Substances 0.000 claims description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
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- E—FIXED CONSTRUCTIONS
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- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
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- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
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- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
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- E04B1/98—Protection against other undesired influences or dangers against vibrations or shocks; against mechanical destruction, e.g. by air-raids
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- E—FIXED CONSTRUCTIONS
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- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
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Abstract
The invention discloses a modularized concrete-filled steel tube multidimensional energy dissipation wall with uniformly distributed stress under an earthquake, and belongs to the technical field of assembled structure earthquake resistance. The system is composed of prefabricated special-shaped steel pipe concrete, connecting pieces among the steel pipe concrete, beam connecting pieces and bolts. The prefabricated special-shaped steel pipe concrete is filled with high-performance concrete polymer, and the mechanical property of the prefabricated special-shaped steel pipe concrete is complementary with that of an external steel pipe, so that the member has good ductility when deformed in the inside and the outside. The energy dissipation wall adopts a distributed wall body which is arranged along the beam direction or in the vertical beam direction, and when the distributed wall body deforms in the plane under the action of external multidimensional excitation, the energy dissipation wall provides lateral force resistance for the structure; when the wall is deformed out of the surface, the stress at the equal thickness position is uniformly distributed, and the bending energy consumption is simultaneously performed by fully utilizing the material performance. Each subassembly of this power consumption wall is prefabricated the production by the mill completely, and the quality is controllable, and adopts assembled modularization installation, and construction convenience is swift, reducible time limit for a project and cost.
Description
Technical Field
The invention relates to a modularized concrete-filled steel tube multidimensional energy dissipation wall with uniformly distributed stress under an earthquake, and belongs to the technical field of fabricated structure earthquake resistance.
Background
Earthquake disasters can cause damage and even collapse of building structures, so that casualties and economic losses are caused. The wall body is an indispensable component of the structure, and the lateral force resistance of the structure is improved or the wall body is only used for forming a partition plane space. However, the traditional wall has many limitations in form and function, and particularly, many problems are exposed under the action of an earthquake, the traditional reinforced concrete shear wall is easy to crack under the action of the earthquake, the phenomenon of damage and damage concentration exists, the damage is serious, the phenomenon of concentration shows that the material is not fully utilized and the ductility is poor, in addition, the bottom damage of the wall caused by the external deformation of the shear wall aggravates the rigidity degradation, the earthquake resistance performance is often not ideal, the overall earthquake resistance and shock absorption effects are limited, the shear wall is complicated to construct, the labor cost is high, the construction process is long, the influence of temperature is large, the environmental pollution is serious, and the material waste phenomenon exists in the construction process. The section steel shear wall also has the problems of insufficient material utilization, the performance of the wall body is still adversely affected by the out-of-plane deformation of the wall body, the steel consumption is large, and the construction cost is increased. The steel plate shear wall is easy to generate out-of-plane instability, and the out-of-plane disturbance of the wall body is caused by the multidimensional excitation property of the earthquake, so that the instability problem is more serious, and not only the wall body is easy to generate a tension band along the diagonal line of the wall and has a negative effect on the performance of two side columns, but the phenomenon can be improved by a rib-densifying method, but the steel consumption is increased, the material utilization rate is not obviously improved, and the building cost is increased. The masonry infilled wall is only used as a plane space partition in design, has poor ductility under the action of an earthquake, is easy to crack, influences the appearance, and even has the possibility of causing the risk of out-of-plane collapse. In addition, the performance of the wall body is affected when a hole is formed in the middle of the wall body, and the arrangement is not flexible. The main problems of the traditional wall body are that the material utilization is insufficient, the cost is high, the performance is not excellent, the influence of out-of-plane deformation on the mechanical property is large, the ductility is poor under the action of an earthquake, the rigidity is seriously degraded, and the energy consumption capability is limited.
The concrete member is easy to crack and the steel member is easy to stabilize, so that the defects of the two materials are macroscopically reflected, and the concrete and steel fully exert the respective material advantages by the provision of the steel tube concrete, so that the steel tube concrete member has high rigidity and bearing capacity under the action of external force, and the material is saved on the premise of ensuring the performance target, thereby reducing the construction cost; meanwhile, the steel plate has good ductility and stability, the probability of instantaneous damage of the component is reduced, and the energy consumption capability of the component can be ensured. The good mechanical property and economic benefit of the steel pipe concrete make it suitable for the construction of the wall body. In recent years, some scholars have discovered the potential of the concrete-filled steel tube shear wall and proposed some construction forms, but the construction forms are not flexible and practical and are not convenient to apply to actual engineering. Firstly, most construction forms depend on-site grouting, the steel pipe concrete wall is difficult to realize full vibration due to thickness, and the microscopic defect of the internal concrete is easy to occur, so that the macroscopic mechanical property of the wall body is influenced; the technical scheme that factory prefabrication is combined with whole wall hoisting is adopted in a small number of assembly type schemes, the problem of concrete mesoscopic defects is solved, the quality of the wall body is integrally controllable, the volume and the quality of the wall body are large, the requirement on hoisting assembly precision is high, and the danger and the difficulty in the hoisting construction process are increased. In addition, the problem of the overall performance reduction of the wall body caused by the local damage of the wall body due to the uneven stress distribution is not improved significantly. Therefore, the method has great significance for exploring a new construction scheme of the prefabricated concrete-filled steel tube wall and improving the wall structure from the aspect of optimizing the mechanical property.
Through the analysis, the invention provides the modularized concrete-filled steel tube multidimensional energy dissipation wall with uniformly distributed stress under the earthquake. The distributed wall body is formed by special-shaped steel pipe concrete and connecting pieces, and is connected by bolts, wherein the special-shaped steel pipe concrete is wrapped by soft steel, the internally poured concrete is high-ductility concrete, the ductility of the concrete is further improved under the action of a hoop of an external steel pipe, and the external steel pipe is not easy to be unstable under the action of bonding and supporting of the internal concrete. In addition, the front surface of the special-shaped steel pipe concrete is trapezoidal, and the front surface of the distributed wall body formed by combining the basic modules is hourglass-shaped, which is based on the result of uniform stress optimization. Based on the uniform stress optimization design, the stress of the component can be uniformly distributed under the conditions of uniformly distributed load and concentrated shearing force or inertia force at two ends, and the material utilization rate of the component is improved. According to the knowledge of material mechanics, when the top end of the triangular plate-shaped structure is subjected to concentrated load in the direction vertical to the normal line of the plane, the stress of each point of the equal-thickness surface is the same. But it is difficult to achieve an effective connection with other members at the top of the triangular plate-like structure because the contact surface at the top of the triangular plate-like structure is too small. Therefore, in view of the full stress mechanics model of the triangular plate, the special-shaped steel tube concrete is designed into a trapezoidal plate type component with a large height-thickness ratio, and the long bottom and the short bottom of the trapezoid follow a certain ratio so as to be close to the shape of the triangular plate. The 4 special-shaped steel pipe concretes are connected with the 1 steel pipe concrete connecting piece to form a distributed wall body, and the distributed wall body is axially symmetrical about a horizontal central line and a vertical central line of the front face of the steel pipe concrete connecting piece. The installation modes of the special-shaped steel pipe concretes on the upper part and the lower part of the connecting piece between the steel pipe concretes are the same, and the two special-shaped steel pipe concretes are symmetrical about the vertical center line of the connecting piece between the steel pipe concretes and are not connected with each other along the height of a wall. When the two ends of the wall body are dislocated along the normal line of the front surface of the wall body, the working principle of the wall body is equivalent to that the four independent special-shaped steel tube concrete are bent to consume energy together, the stress distribution of the cross section with the same thickness of each special-shaped steel tube is uniform in the bending process, the material performance is utilized to the maximum extent, and a large amount of energy is dissipated by the distributed wall body on the premise of less material consumption. When the two ends of the distributed wall are subjected to in-plane dislocation, the distributed wall has strong lateral resistance, the advantages of concrete and steel pipes are complementary, the ductility of the high-ductility concrete under the action of hoops of the external steel pipes is further enhanced, the damage distribution is relatively uniform, and the member has the advantages of low ductility and low rigidity degradation. The wall body distribution wall is arranged in an orthogonal shape, the normal direction of the front surface of part of the distribution wall is vertical to the axis of the beam, and the other part of the distribution wall is parallel to the axis of the beam, so that the wall body distribution wall can provide help for the lateral force resistance of the structure in the inner and outer directions of the wall surface and can efficiently dissipate energy. The specific principle is that external excitation can be decomposed into two directions, namely a beam direction and a vertical beam direction, when the external excitation acts, the wall body with the same direction as the excitation and the front external normal direction in the distribution wall body can start to consume energy, and the distribution wall body orthogonal to the distribution wall body provides lateral force resistance for the structure. Meanwhile, the wall body is very flexible in arrangement, different from the traditional shear wall which is influenced by punching, and the wall body can flexibly adapt to the punching requirement by changing the number and the orientation of the distributed walls. In conclusion, the system remarkably overcomes the defects of the existing wall body and is a composite energy consumption system with wide application prospect.
Disclosure of Invention
In order to overcome the defects that the construction difficulty of the existing wall form is high, the material performance cannot be fully and reasonably utilized, the outer energy consumption capacity of the wall surface is weak, the wall surface is easy to damage, the in-plane lateral resistance is affected, the ductility is insufficient and the like, the modularized concrete-filled steel tube multidimensional energy consumption wall with uniformly distributed stress under the earthquake is provided, the wall adopts a distributed modularized wall body, and a manufacturing construction method of factory prefabrication and full-dry assembly is adopted, so that the inner surface and the outer surface of the wall surface have strong energy consumption capacity and lateral resistance capacity, the damage is uniform and controllable, the rigidity degradation is not easy to occur while the ductility is very strong, and the wall can be flexibly arranged according to the hole opening requirement.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention discloses a modularized concrete-filled steel tube multidimensional energy dissipation wall with uniformly distributed stress under an earthquake, which mainly comprises: prefabricating special-shaped steel pipe concrete 1, connecting holes 2, steel pipe concrete interlayer connecting pieces 3, side face end plates 4, middle end plates 5, beam part connecting pieces 6, bolts 7 and beams 8; the front surface of the prefabricated special-shaped steel pipe concrete 1 is trapezoidal, and the connecting hole 2 on the long bottom side of the trapezoid is aligned with the bolt hole on the beam part connecting piece 6 and is connected with the bolt 7 by penetrating the bolt hole; aligning the trapezoidal short bottom side of the front surface of the prefabricated special-shaped concrete filled steel tube 1 with a bolt hole on the connecting piece 3 between the concrete filled steel tube and inserting a bolt 7 to complete the connection of the two; if roof beam 8 is the steel member, then roof beam portion connecting piece 6 accessible integrated into one piece mode is connected with roof beam 8, if roof beam 8 is the reinforced concrete component then accessible pre-buried mode carries out being connected between roof beam 8 and roof beam portion connecting piece 6.
The external steel pipe of the prefabricated special-shaped steel pipe concrete 1 is a special-shaped steel pipe, the thickness of the steel pipe is consistent, the thickness of the steel pipe can be selected within the range of 1-20mm according to the energy consumption requirement and the structural bearing capacity requirement, and the steel pipe is made of a mild steel material; the special-shaped steel pipe is integrally quadrangular, the top surface and the bottom surface are rectangular, the direction of the short sides of the rectangle is the wall thickness direction, the lengths of the short sides of the two rectangles are the same and parallel, and the length of the short sides can be taken within the range of 10cm-30 cm; the long side direction of the top surface rectangle and the bottom surface rectangle is the width direction of the distribution wall, and values can be taken within the interval of 30cm-200cm according to the structural space, the energy consumption capability and the bearing capacity; the distance between the top surface and the bottom surface can be selected within the range of 1.2m-3m according to the height of the structural layer. One of the two groups of opposite side surfaces of the quadrangular prism is in an congruent trapezoid shape, namely a front side surface and a rear side surface of the prefabricated special-shaped concrete filled steel tube 1, and the two surfaces are parallel and vertical to the top surface and the bottom surface; the end connected with the beam connecting piece 6 is a trapezoidal long bottom, the end connected with the beam connecting piece 6 is a trapezoidal short bottom, and the length ratio of the long bottom to the short bottom is controlled within the range of 1.5-5 so as to ensure that the stress is uniformly distributed in the direction vertical to the wall thickness and fully utilize the material performance; the other pair of side surfaces of the quadrangular prism are both rectangular.
Concrete is filled in the precast irregular steel tube concrete 1 irregular steel tube concrete, and different types of concrete polymers can be selected according to the performance requirements of components; when the structure has high strength requirement but is not sensitive to the manufacturing cost, graphene or carbon nano tube active powder concrete can be used as an inner filling material; when the structure has higher requirement on strength but is sensitive to manufacturing cost, common reactive powder concrete or engineering cement-based composite material can be used as an inner filling material; when the structure has lower requirements on the strength of the wall body and higher sensitivity to the manufacturing cost, rubber concrete can be used as an internal filling material; when the prefabricated special-shaped steel pipe concrete 1 is prefabricated in a factory, the internal concrete is uniform and dense, and the prefabricated special-shaped steel pipe concrete 1 after grouting can be treated by means of ultrasonic waves or centrifugation and the like.
The connecting hole 2 is positioned on the front side surface and the back side surface of the prefabricated special-shaped steel tube concrete 1, the positions are close to the top and the bottom, the connecting hole 2 is cylindrical and vertically penetrates through a component, the inner diameter of the connecting hole 2 is 10-20mm, the wall of the connecting hole 2 is tightly connected with the front side surface and the back side surface of the prefabricated special-shaped steel tube concrete 1, and the value of the wall thickness can be taken within the range of 1-10 mm according to the requirement of connecting strength; the connecting holes 2 can be arranged in a single layer or in multiple layers according to the requirement of the connection strength of the prefabricated special-shaped concrete filled steel tube 1 and the beam 8.
The steel pipe concrete-to-concrete connecting piece 3 is made of high-strength steel, the yield strength of the material of the high-strength steel is at least more than 500MPa, the high-strength steel is composed of 4 side end plates 4 and 1 middle end plate 5, the thickness of the middle end plate 5 is more than that of the two side end plates 4, and the thickness is within the range of 20mm-50 mm; the side end plates 4 and the middle end plate 5 are welded or integrally formed, the side end plates 4 are connected with the longer sides of the middle end plate 5, and the longer sides of the middle end plate 5 penetrate through the length center line of the longer sides and are parallel to the front horizontal center line of the side end plates 4; finally, the front view and the side view of the steel pipe concrete-filled connector 3 formed by the end plates are both H-shaped, the side end plates 4 and the middle end plate 5 are formed into 4U-shaped grooves in a conformal mode, the width of the bottom of each groove is equal to the thickness of the prefabricated special-shaped steel pipe concrete 1, and the length of each groove is equal to the short edge of the trapezoidal face of the prefabricated special-shaped steel pipe concrete 1; the side wall of the groove is provided with a through bolt hole, the size and the shape of the bolt hole are equal to those of the connecting hole 2, and the positions of the bolt holes correspond to those of the connecting hole.
The beam part connecting piece 6 is two regular quadrangular plates with the same shape, the material strength of the beam part connecting piece is at least more than 500MPa, the thickness of the beam part connecting piece is selected within the interval of 20mm-50mm according to the requirement of the connecting strength, two planes in the vertical thickness direction are a top surface and a bottom surface of the beam part connecting piece, the top surface or the bottom surface of the beam part connecting piece is vertically projected to the top surface or the bottom surface of the other beam part connecting piece along the normal direction of the top surface or the bottom surface of the beam part connecting piece, the projection surface is completely coincided with the plate surface, the positions of bolt holes formed in the top surface and the bottom surface of the two beams correspond to the positions of the connecting holes 2 of the long sides of the front trapezoidal surfaces and the rear sides of the prefabricated special-shaped steel pipe concrete 1, and the sizes and the shapes of the bolt holes are the same; the width of a groove formed by the two plates and the beam 8 is equal to the thickness of the special-shaped steel tube concrete 1, and the length of the groove is equal to the length of the long sides of the trapezoidal surfaces of the front side and the rear side of the prefabricated special-shaped steel tube concrete 1; the connection mode of the beam part connecting piece 6 and the beam 8 can adopt integral forming, bolt connection or pre-embedding according to the beam construction type.
The bolt 7 can be divided into 3 sections along the main shaft direction, namely a nut, a smooth round rod area and a thread area; the cross section of the nut can be regular polygon or circle, and the diameter of the circle or the longest diagonal of the regular polygon should be at least larger than the diameter of the bolt holes on the steel pipe concrete interval connecting piece 3 and the beam part connecting piece 6; the length of the smooth round rod area is equal to the sum of the thickness of two side surface end plates 4 of a connecting piece 3 between the steel pipe concretes and the thickness of a connecting hole 2 on the special-shaped steel pipe concrete 1, and the diameter of the smooth connecting rod area is equal to the diameter of a bolt hole on the side surface end plate 4 and the diameter of the connecting hole 2; the inner diameter of the threaded area is equal to the diameter of the smooth screw rod area, and the length of the threaded area is at least more than 5mm for ensuring the connection strength.
The beam 8 can be a reinforced concrete beam or a steel beam, when the reinforced concrete beam is adopted, the beam connecting piece 6 can be connected with the beam in a pre-buried mode, and the pre-buried part needs to be subjected to shear-resistant strengthening treatment along the width direction of the special-shaped steel pipe concrete 1; when the beam 8 is a steel beam, the beam connecting member 6 may be directly formed integrally with the beam 8 or connected by bolts, and a stiffening rib is added near the joint of the beam 8 and the beam connecting member 6 along the width direction of the special-shaped steel pipe concrete 1.
Compared with the existing wall body, the invention has the advantages that:
1. all components are prefabricated in factories and installed in a module assembling mode, construction is convenient, material waste is reduced, and the method is environment-friendly.
2. The wall surface has energy consumption capacity and lateral resistance capacity inside and outside, when the distributed wall body is deformed outside the surface, the stress of the profiled steel tube concrete equal-thickness surface is uniformly distributed, the material performance can be utilized to the maximum extent, and the energy consumption is high; when the distributed wall body is deformed in the plane, the good ductility of the outer-coated steel pipe and the inner-filled concrete and the synergistic effect between the outer-coated steel pipe and the inner-filled concrete are benefited, the whole wall body has good ductility, the rigidity degradation is not easy to occur, and the wall body has good energy consumption performance and lateral force resistance.
3. The arrangement is flexible, and the hole opening requirements can be flexibly adapted by changing the number and the orientation of the distribution walls.
Drawings
Fig. 1 is an overall schematic diagram of a modular concrete-filled steel tube multidimensional energy dissipation wall with uniformly distributed stress under an earthquake.
Fig. 2 is a schematic diagram of deformed concrete-filled steel tube.
FIG. 3 is a schematic sectional view of a special-shaped concrete filled steel tube
Fig. 4 is a schematic view of a connection member between concrete filled steel tubes.
Fig. 5 is a schematic view of a distributed wall.
Figure 6 is a schematic view of a beam and beam section connector.
Figure 7 is a cross-sectional view of a beam and beam connection.
Fig. 8 is a schematic view of a bolt.
In the figure: 1-prefabricating special-shaped steel pipe concrete, 2-connecting holes, 3-connecting pieces among the steel pipe concrete, 4-side end plates, 5-middle end plates, 6-beam part connecting pieces, 7-bolts and 8-beams.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, belong to the scope of the present invention.
As shown in the attached drawings 1 and 2, the modularized concrete-filled steel tube multidimensional energy dissipation wall with uniformly distributed stress under earthquake is composed of prefabricated special-shaped concrete-filled steel tube 1, connecting holes 2, connecting pieces 3 among the concrete-filled steel tube, side end plates 4, middle end plates 5, beam connecting pieces 6, bolts 7 and beams 8. The embodiment describes the concrete construction of the modular concrete-filled steel tube multi-dimensional energy dissipation wall with uniformly distributed stress under the earthquake by using an assembled reinforced concrete structure.
1, positioning and pre-embedding a beam part connecting piece 6 before the precast pouring process of a beam, shearing and reinforcing the beam along the direction of the beam part connecting piece 6, connecting a beam 8 with a support column after the beam maintenance is finished, and constructing the beam, the beam and the beam part connecting piece 6 as shown in figures 6 and 7; in this example the beam span is 6000mm, the column height is 2830mm, the length of the longitudinal beam section connecting piece 4 is 500mm, and the thickness is 20 mm. The length of the beam part connecting piece 4 in the axial direction of the vertical beam is 300mm, the thickness is 20mm, and the vertical beam is made of steel with the yield strength of 500 Mpa. Along roof beam to distributive wall body central line respectively apart from post medial surface 1500mm, 3000mm, 4500mm, 6 intervals are 100mm along two roof beam portion connecting pieces of roof beam axis direction, and 6 intervals are 100mm for two roof beam portion connecting pieces of perpendicular roof beam axis direction. Perpendicular roof beam axis direction distribution wall body central line is 750mm apart from post medial surface respectively, 2250mm, 3750mm, 5250mm, and 6 intervals are 100mm along two roof beam portion connecting pieces of roof beam axis direction, and 6 intervals are 50mm for two roof beam portion connecting pieces of perpendicular roof beam axis direction, and the bolt hole radius is 15mm on the roof beam portion connecting piece 6.
2, hoisting wall components, wherein the concrete material filled in the prefabricated special-shaped steel tube concrete 1 is an engineering cement-based composite material. After hoisting is finished, bolt holes of the grooves of the prefabricated special-shaped concrete filled steel tube 1 connected with the floor bottom beam 8 and the beam connecting piece 6 are aligned, the length of the trapezoidal long bottom of the prefabricated special-shaped concrete filled steel tube 1 of the distributed wall body with the normal line parallel to the axis direction of the beam is 500mm, the length of the short bottom is 300mm, the thickness of the concrete filled steel tube is 100mm, the thickness of the externally-coated steel tube is 10mm, and the steel tube is made of soft steel. The length of the trapezoid long bottom of the prefabricated special-shaped concrete filled steel tube 1 of the distributed wall body with the normal line of the front surface perpendicular to the axis direction of the beam is 300mm, the length of the short bottom is 200mm, the whole thickness is 100mm, and the outer-coated steel tube is soft steel with the thickness of 5 mm. The height of the prefabricated special-shaped steel pipe concrete 1 is 1400 mm. The bolt holes are aligned with the connecting holes 2 and then connected with bolts 7 inserted, the bolt is schematically shown in figure 5, the length of the bolt is 150mm, the radius of the bolt is 15mm, and the bolt is made of steel with the yield strength of 500 Mpa. As shown in the figures 1 and 5, the two prefabricated special-shaped steel pipe concretes 1 are symmetrically arranged when being connected with the beam part connecting piece 6, and the right-angle sides of the trapezoidal surfaces at the front side and the rear side of the prefabricated special-shaped steel pipe concretes are relatively close to each other.
3 place connecting piece 3 between concrete filled steel tube in special-shaped concrete filled steel tube 1, its material is the steel that yield strength is greater than 500Mpa, align bolt hole and connecting hole 2 and be connected, connecting piece 3 schematic diagram between concrete filled steel tube is shown in figure 4, the side end plate 4 width of connecting piece 3 between concrete filled steel tube equals special-shaped concrete filled steel tube 1 trapezoidal short base length, side end plate 4 height is 200mm, thickness is 20mm, middle end plate 5 thickness is 30mm, the bolt hole radius is 15mm on the connecting piece 3 between concrete filled steel tube.
4, placing two special-shaped steel pipe concretes 1 on the connecting piece 3 between the steel pipe concretes, wherein the special-shaped steel pipe concretes 1 and the lower part of the special-shaped steel pipe concretes 1 are arranged in an axial symmetry mode about the connecting piece 3 between the steel pipe concretes, aligning corresponding bolt holes, and finally adopting bolts for connection, wherein the overall schematic diagram of the distributed wall body is shown in a figure 5, and the schematic diagram of connecting bolts is shown in a figure 8.
The system is simple in structure, the components are prefabricated in a factory, the components are installed in a modularized mode during installation on a construction site, welding and wet operation are not needed, the system is convenient and efficient, the quality of the components is stable and controllable, the size and the quality of each component of the system are controllable, the transportation and hoisting cost is low, and the safety is high. The system adopts a distributed wall body, basic modules of the wall body are made of special-shaped steel pipe concrete with a trapezoidal front surface, the front surface of the wall body is in a hourglass shape after the basic modules are combined into the distributed wall body, and researches can confirm that when the upper end and the lower end of the wall body are dislocated in the direction vertical to the normal of the front surface under the shape, the stress at the equal-thickness parts of the wall body is uniformly distributed. The energy dissipation wall distributed wall body is perpendicular or parallel to the axial direction of the beam, under the action of earthquake or other multidimensional external excitation, the wall body with the normal direction at the front side and the lateral movement direction perpendicular provides lateral resistance for the structure and mainly generates bending energy dissipation, and the integral damage of the distributed wall body is controllable due to the characteristics of high ductility and difficulty in rigidity degradation of the special-shaped steel pipe concrete. The wall body with the normal direction on the front side parallel to the lateral movement direction is mainly used for bending energy consumption, stress distribution at equal thickness parts of the wall body is uniform, stress is reasonable, material properties are fully utilized, energy consumption is high, and vibration reduction efficiency is high. In addition, the wall body in the system can be in a distributed and modularized design, the arrangement is flexible in a building structure, and the influence on the arrangement of doors and windows is small. In summary, the modularized concrete filled steel tube multidimensional energy dissipation wall with uniformly distributed stress under earthquake is a novel multifunctional wall body with good multidimensional damping capacity, flexible arrangement and convenient installation and wide application prospect.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The utility model provides a modularization steel pipe concrete multidimension power consumption wall of stress evenly distributed under earthquake which characterized in that: the special-shaped concrete filled steel tube connecting piece comprises prefabricated special-shaped concrete filled steel tube (1), wherein the front surface of the prefabricated special-shaped concrete filled steel tube (1) is trapezoidal, and a connecting hole (2) on the long bottom side of the trapezoid is aligned with a bolt hole on a beam part connecting piece (6) and penetrates through a bolt (7) to complete connection of the two parts; aligning the trapezoidal short bottom side of the front surface of the prefabricated special-shaped concrete filled steel tube (1) with a bolt hole on the connecting piece (3) between the concrete filled steel tube and penetrating a bolt (7) to complete connection; the steel pipe concrete interlayer connecting piece (3) is arranged between the two prefabricated special-shaped steel pipe concretes (1), so that the wall body is in an hourglass shape; if roof beam (8) are the steel member, then roof beam portion connecting piece (6) are connected with roof beam (8) through integrated into one piece mode, if roof beam (8) are the reinforced concrete component then carry out being connected between roof beam (8) and roof beam portion connecting piece (6) through pre-buried mode.
2. The modular concrete-filled steel tube multidimensional energy dissipation wall with the stress evenly distributed under the earthquake as recited in claim 1, is characterized in that: the outer steel pipe of the prefabricated special-shaped steel pipe concrete (1) is a special-shaped steel pipe; the special-shaped steel pipe is integrally quadrangular, the top surface and the bottom surface are rectangular, the direction of the short sides of the rectangle is the wall thickness direction, and the lengths of the short sides of the two rectangles are the same and parallel; one of the two groups of opposite side surfaces of the quadrangular prism is in an congruent trapezoid shape, namely a front side surface and a rear side surface of the prefabricated special-shaped concrete filled steel tube (1), and the two surfaces are parallel and vertical to the top surface and the bottom surface; one end connected with the beam part connecting piece (6) is a trapezoid long bottom, and the other end connected with the steel pipe concrete room connecting piece (3) is a trapezoid short bottom; the other pair of side surfaces of the quadrangular prism are both rectangular.
3. The modular concrete-filled steel tube multidimensional energy dissipation wall with the stress evenly distributed under the earthquake as recited in claim 1, is characterized in that: concrete is filled in the special-shaped steel tube concrete of the prefabricated special-shaped steel tube concrete (1), and different types of concrete polymers are selected according to the performance requirements of the components; the filling material is graphene or carbon nano tube active powder concrete, or common active powder concrete or engineering cement-based composite material; when the precast special-shaped steel tube concrete (1) is precast in a factory, the internal concrete is uniform and dense, and the precast special-shaped steel tube concrete (1) after grouting is processed by adopting an ultrasonic or centrifugal means.
4. The modular concrete-filled steel tube multidimensional energy dissipation wall with the stress evenly distributed under the earthquake as recited in claim 1, is characterized in that: the connecting holes (2) are positioned on the front side surface and the back side surface of the prefabricated special-shaped concrete filled steel tube (1) and are close to the top and the bottom, the connecting holes (2) are cylindrical and vertically penetrate through a component, the inner diameter of each connecting hole (2) is 10-20mm, the wall of each connecting hole (2) is tightly connected with the front side surface and the back side surface of the prefabricated special-shaped concrete filled steel tube (1), and the value of the wall thickness is within the range of 1-10 mm according to the requirement of the connecting strength; the connecting holes (2) are arranged in a single layer or in multiple layers according to the requirement of the connection strength of the prefabricated special-shaped concrete filled steel tube (1) and the beam (8).
5. The modular concrete-filled steel tube multidimensional energy dissipation wall with the stress evenly distributed under the earthquake as recited in claim 1, is characterized in that: the connecting piece (3) between the concrete filled steel tubes adopts high-strength steel, the yield strength of the material of the high-strength steel is at least more than 500Mpa, the connecting piece is composed of four side end plates (4) and a middle end plate (5), the thickness of the middle end plate (5) is more than that of the side end plate (4), and the thickness is 20mm-50 mm; the side end plates (4) and the middle end plate (5) are welded or integrally formed, the side end plates (4) are connected with the longer side surfaces of the middle end plate (5), and the longer side surfaces of the middle end plate (5) penetrate through the length central line and are parallel to the front horizontal central line of the side end plates (4); finally, the front view and the side view of the steel pipe concrete-filled connector (3) formed by the end plates are both H-shaped, the side end plates (4) and the middle end plate (5) are formed into four U-shaped grooves in a conformal mode, the width of the bottom of each groove is equal to the thickness of the prefabricated special-shaped steel pipe concrete (1), and the length of each groove is equal to the short edge of the trapezoidal face of the prefabricated special-shaped steel pipe concrete (1); the side wall of the groove is provided with a through bolt hole, the size and the shape of the bolt hole are equal to those of the connecting hole (2), and the positions of the bolt holes correspond to those of the connecting hole.
6. The modular concrete-filled steel tube multidimensional energy dissipation wall with the stress evenly distributed under the earthquake as recited in claim 1, is characterized in that: the beam part connecting pieces (6) are two regular quadrangular plates with the same shape, the beam part connecting pieces are made of high-strength steel, two planes in the vertical thickness direction are a plate top surface and a bottom surface, vertical projection is carried out on the top surface or the bottom surface of the other plate along the normal direction of the plate top or the bottom surface, the projection surfaces are completely coincided with the plate surfaces, the positions of bolt holes formed in the top surface and the bottom surface of the two plates correspond to the positions of the connecting holes (2) on the long sides of the front trapezoidal surface and the rear trapezoidal surface of the prefabricated special-shaped steel pipe concrete (1), and the sizes and the shapes are the same; the width of a groove formed by the two plates and the beam (8) is equal to the thickness of the prefabricated special-shaped steel tube concrete (1), and the length of the groove is equal to the length of the long sides of the trapezoidal surfaces of the front side and the rear side of the prefabricated special-shaped steel tube concrete (1); the connection mode of the beam part connecting piece (6) and the beam (8) adopts integral forming, bolt connection or pre-embedding according to the beam structure type.
7. The modular concrete-filled steel tube multidimensional energy dissipation wall with the stress evenly distributed under the earthquake as recited in claim 1, is characterized in that: the bolt (7) is sequentially divided into three sections along the direction of a main shaft, namely a nut, a smooth round rod area and a thread area; the cross section of the nut is selected from a regular polygon or a circle, and the diameter of the circle or the longest diagonal of the regular polygon is at least larger than the diameter of bolt holes in the steel pipe concrete interval connecting piece (3) and the beam part connecting piece (6); the length of the smooth round rod area is equal to the sum of the thickness of two side end plates (4) of a connecting piece (3) between the concrete filled steel tubes and the thickness of a connecting hole (2) on the prefabricated special-shaped concrete filled steel tube (1), and the diameter of the smooth connecting rod area is equal to the diameter of a bolt hole on the side end plate (4) and the diameter of the connecting hole (2); the internal diameter of the threaded zone is equal to the diameter of the smooth screw zone, and the length of the threaded zone is at least greater than 5mm in order to ensure the connection strength.
8. The modular concrete-filled steel tube multidimensional energy dissipation wall with the stress evenly distributed under the earthquake as recited in claim 1, is characterized in that: the beam (8) is a reinforced concrete beam or a steel beam, when the reinforced concrete beam is adopted, the beam part connecting piece (6) is connected with the beam in a pre-embedded mode, and at the moment, the pre-embedded part is subjected to shear-resistant strengthening treatment along the width direction of the prefabricated special-shaped steel pipe concrete (1); when the beam (8) is a steel beam, the beam part connecting piece (6) is directly and integrally formed with the beam (8) or connected by bolts, and stiffening ribs are required to be additionally arranged near the joint part of the beam (8) and the beam part connecting piece (6) along the width direction of the prefabricated special-shaped steel pipe concrete (1).
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