CN111321819A - Biomimetic spine-column-swing-column hybrid seismically recoverable structural system - Google Patents

Abstract

The invention provides a bionic spine type column-swing column mixed anti-seismic recoverable structural system which comprises a plurality of steel spine type columns and at least one steel swing column, wherein the steel spine type columns and the at least one steel swing column are uniformly supported on the periphery of a floor slab of each layer; three steel column from the top down through toper arch and the sunken concatenation of back taper, a plurality of prestressing tendons evenly arrange along the circumference on each steel column inner wall, a plurality of prestressing tendons run through whole steel chine column. The invention has the advantages of assembly, shock absorption, shock resistance, restorability and collapse resistance.

Description

Biomimetic spine-column-swing-column hybrid seismically recoverable structural system

technical field

The invention belongs to the field of earthquake-resistant buildings, in particular to a bionic spine-type column-swinging column hybrid earthquake-resistant and recoverable structural system.

Background technique

my country is an earthquake-prone country, and based on the existing technological level and economic conditions, the fortification goals of "three levels" are put forward for the seismic design of buildings, namely "no damage in small earthquakes, repairable in moderate earthquakes, and no collapse in large earthquakes. ". Under the requirements of the three-level fortification, if the building structure is designed with the concept of the recoverable system, it can obtain higher seismic performance on the basis of satisfying the "three levels". Structural recoverability means that after a structure is subjected to a certain intensity of earthquake action, the structure can recover to a state with acceptable residual deformation without external intervention.

The bionic spine column belongs to a form of segmental column. The form of segmental column has been found in the seismic research of bridge piers, which can change the yield position of the bridge pier, play a certain shock absorption effect, and then cause the structure to be damaged. become smaller; in combination with prestressed reinforcement, segmental columns can also achieve structural recoverability. The swinging column is to set the bottom end of the column and the foundation to be hinged, and the column and the floor slabs of each floor are set to form a flexible connection. When the structure is greatly deformed, the swinging column has a resistance to collapse.

SUMMARY OF THE INVENTION

In view of this, the present invention aims to propose a bionic spine-type column-swinging column hybrid earthquake-resistant and recoverable structural system. Seismic recoverability and collapse resistance.

In order to achieve the above object, the technical scheme of the present invention is achieved in this way:

A bionic spine-type column-swing-column hybrid earthquake-resistant and recoverable structural system comprises a plurality of steel spine-type columns and at least one steel swinging column uniformly supported around the floors of each floor, and a plurality of steel spine-type columns at the bottom The bottom ends of the columns are all fixed on the foundation, the tops of several steel spine columns at the bottom are fixed on the floor slab of the lowest floor, and the ends of the other steel spine columns are fixed on the corresponding floor slabs. A frame structure is formed between the backbone column, the foundation and the floor slabs of each floor, and holes are reserved in the floor slabs of each floor. They are set through the reserved holes of the floor slabs of each floor in sequence;

Each steel backbone column includes steel column 1, steel column 2, steel column 3 and a number of prestressed steel bars; conical protrusions are arranged on the lower ends of steel column 1 and steel column 2, The upper end of the third column is provided with an inverted conical depression that cooperates with the conical protrusion, and the steel column 1, steel column 2 and steel column 3 are sequentially spliced through the conical protrusion and the inverted conical depression from top to bottom. Assembly, a number of prestressed steel bars are evenly arranged along the circumference on the inner wall of each steel column, and a number of prestressed steel bars run through the entire steel backbone column.

Further, the conical protrusion includes a steel cone and a lead block tip, the steel cone is integrally formed with a corresponding steel column, and the lead block tip is fixedly connected to the steel cone.

Further, both ends of the steel spine-type column are respectively fixed to the floor slabs of each floor and to the foundation through a steel plate.

Further, the steel rocking column is arranged at the center of the frame structure.

Further, the steel rocking column is arranged at the side of the frame structure.

Further, the lengths of the first, second and third steel columns are the same, and the lengths of the conical protrusions at the bottoms of the first and second steel columns are the same, which are half the length of the steel columns.

Further, the number of the steel spine-type columns and the steel swinging columns is set according to the requirements of the building frame structure. Specifically, four steel spine-type columns are set at each floor slab, and are supported at the corners of the floor slabs. One of the steel rocking columns is arranged at the place; the earthquake-resistant and recoverable structural system is arranged in the inner wall of the building frame structure.

Further, four prestressed steel bars are arranged in each steel backbone column.

Compared with the prior art, the bionic spine column-swinging column hybrid seismic recoverable structural system of the present invention has the following advantages:

The bionic spine-type column-swinging column hybrid anti-seismic recoverable structural system of the invention,

1. The structural mechanism of the structural system is simple, and it is easy to realize prefabricated construction.

2. Compared with the traditional building frame system, it has the properties of shock absorption, collapse resistance and recovery at the same time.

Description of drawings

The accompanying drawings constituting a part of the present invention are used to provide further understanding of the present invention, and the exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the attached image:

1 is a schematic structural diagram of a bionic spine-type column-swinging column hybrid earthquake-resistant and recoverable structural system according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a steel spine type column according to an embodiment of the present invention.

Description of reference numbers:

1-Floor, 2-Steel spine column, 3-Steel swing column, 4-Universal hinge, 5-Foundation, 6-Steel column one, 7-Steel column two, 8-Steel column three, 9-Prestressed Reinforcing bars, 10-connecting steel plates, 11-steel cones, 12-lead block tips.

Detailed ways

It should be noted that the embodiments of the present invention and the features of the embodiments may be combined with each other under the condition of no conflict.

The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

As shown in Fig. 1-Fig. 2, the bionic spine-swing-column hybrid earthquake-resistant and recoverable structural system includes several steel spine-type columns 2 and at least one steel swing uniformly supported around the floors 1 of each floor. Column 3, the bottom ends of several steel spine-type columns 2 at the bottom are fixed on the foundation 5, the tops of several steel spine-type columns 2 at the bottom are fixed on the floor 1 of the lowest floor, and the rest of several steel spine-type columns Both ends of the column 2 are fixed on the corresponding floor 1, a frame structure is formed between a number of steel spine columns 2 and the foundation 5 and the floor 1 of each floor, and holes are reserved on the floor 1 of each floor. The bottom end of the steel rocking column 3 is connected with the foundation 5 through the universal hinge 4, and the top end of the steel rocking column 3 is arranged through the reserved holes of the floor slabs 1 of each floor in turn;

Each steel spine type column 2 includes steel column one 6, steel column two 7, steel column three 8 and four prestressed steel bars 9; From the beginning, the upper ends of the steel column two 7 and the steel column three 8 are all provided with an inverted conical depression that cooperates with the conical protrusion, and the steel column one 6, the steel column two 7 and the steel column three 8 are from top to bottom. The four prestressed steel bars 9 are evenly arranged along the circumference on the inner wall of each steel column, and the four prestressed steel bars 9 all run through the entire steel backbone column 2 .

The conical protrusion includes a steel cone 11 and a lead block tip 12, the steel cone 11 is integrally formed with a corresponding steel column, and the lead block tip is fixedly connected with the steel cone.

Both ends of the steel spine-type column 2 are respectively fixed to the floor 1 of each floor and to the foundation 5 through a steel plate 10 .

The steel rocker column 3 is provided at the center of the frame structure or the steel rocker column 3 is provided at the sides of the frame structure.

Steel column 1, steel column 2 and steel column 3 have the same length, and the length of the conical protrusion at the bottom of steel column 1 and steel column 2 is the same, which is half the length of the steel column, that is, the conical protrusion is the same as the length of the steel column. The matching length of the inverted conical depression is half the length of the steel column, which ensures the reliability of the connection between the three steel columns, and the splicing and disconnection does not occur when a large bending occurs.

The number of steel spine-type columns 2 and steel swinging columns 3 is determined according to the requirements of the building frame structure. Specifically, four steel spine-type columns 2 are set at each floor slab 1, which are supported at the corners of the floor slab 1. One of the steel rocking columns 3 is arranged at the place; the earthquake-resistant and recoverable structural system is arranged in the inner wall of the building frame structure.

In actual use, a number of steel spine columns 2 and steel swing columns 3 can be set in the existing building frame system as required, and the reserved space between the steel swing columns 3 and the floor slab 1 can be reached according to the displacement angle between floors The principle of just contact between the two at the collapse limit is determined, and the flexible connection between the two should ensure that the column remains vertical when no horizontal force is applied.

The present application has shock-absorbing and recoverable performance: the existing building frame structure produces a relative horizontal displacement of the floor 1 under the action of an earthquake, which drives the steel spine-type column 2 assembled from three parts to bend and rotate. During the bending process , the prestressed steel bar 9 is stretched. When the relative horizontal displacement is zero, the structure moves to the initial state. Due to the existence of the prestressed steel bar 9, and it is further stretched, part of the seismic energy is consumed, the seismic response of the structure is reduced, and the purpose of shock absorption is achieved. Function.

The application has assembly and anti-collapse performance: a sufficiently long inter-embedding length is designed between the steel column one 6, the steel column two 7 and the steel column three 8 to ensure that the steel spine type column 2 will not be bent when a large bending occurs. Splice is broken. The presence of prestressed reinforcement bars 9 improves the integrity of the steel spine column 2 . At the same time, the steel rocking column 3 set in the existing building frame system is hinged with the foundation 5 and has reserved pores with the floor slabs 1 of each floor. When the existing building frame system has a certain relative displacement, it will To limit the continued tilting of the existing building frame architecture, so as to achieve the purpose of collapse resistance. In addition, if a plurality of steel rocking columns 3 are arranged according to the actual situation, the function of resisting torsional collapse of the whole structure can be achieved.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the present invention. within the scope of protection.

Claims (8)

1. A bionic spine-type column-swinging column hybrid anti-seismic recoverable structural system is characterized in that: comprising several steel spine-type columns (2) and at least one uniformly supported around the floor (1) of each floor. A steel rocking column (3), the bottom ends of a number of steel spine-type columns (2) at the bottom are fixed on the foundation (5), and the top ends of a number of steel spine-type columns (2) at the bottom are fixed on the bottom layer On the floor slab (1), the two ends of the other several steel backbone columns (2) are fixed on the corresponding floor slabs (1). A frame structure is formed between (1), and holes are reserved on the floor slabs (1) of each floor. The tops of the rocking columns (3) are arranged through the reserved holes of the floor slabs (1) of each floor in sequence; Each steel backbone column (2) includes steel column one (6), steel column two (7), steel column three (8) and several prestressed reinforcement bars (9); The lower ends of the second column (7) are provided with conical protrusions, and the upper ends of the second steel column (7) and the third steel column (8) are provided with inverted conical depressions matched with the tapered protrusions. Column one (6), steel column two (7) and steel column three (8) are assembled from top to bottom through conical protrusions and inverted conical depressions, and several prestressed steel bars (9) are installed on the inner wall of each steel column. The upper part is evenly arranged along the circumference, and several prestressed steel bars (9) run through the entire steel backbone column (2). 2. The bionic spine-type column-swinging column hybrid earthquake-resistant and recoverable structural system according to claim 1, wherein the conical protrusion comprises a steel cone (11) and a lead block tip (12) , the steel cone (11) is integrally formed with the corresponding steel column, and the tip of the lead block is fixedly connected with the steel cone. 3. The bionic spine-type column-swinging column hybrid anti-seismic and recoverable structural system according to claim 1, characterized in that: the two ends of the steel spine-type column (2) are respectively connected with a steel plate (10) to The floor slabs (1) of each floor are fixedly connected with the foundation (5). 4. The bionic spine-type column-swinging column hybrid earthquake-resistant and recoverable structural system according to claim 1, wherein the steel rocking column (3) is arranged at the center of the frame structure. 5. The bionic spine-type column-swinging column hybrid earthquake-resistant and recoverable structural system according to claim 1, wherein the steel rocking column (3) is arranged at the side of the frame structure. 6. The bionic spine-type column-swinging column hybrid anti-seismic recoverable structural system according to claim 2, wherein the first steel column, the second steel column and the third steel column have the same length, and the steel column one and the The lengths of the conical protrusions at the bottom of the second steel column are the same, which are half the length of the steel column. 7. The bionic spine-type column-swinging column hybrid seismic recoverable structural system according to claim 1, 2, 3, 5 or 6, characterized in that: the steel spine-type column (2) and the steel swinging column The number of the columns (3) is set according to the requirements of the building frame structure. Specifically, four steel spine-type columns (2) are arranged at each floor slab, and are supported at the corners of the floor slab. (3) Set one; the earthquake-resistant and recoverable structural system is set in the inner wall of the building frame structure. 8. The bionic spine-type column-swinging column hybrid earthquake-resistant and recoverable structural system according to claim 1, characterized in that: each steel spine-type column (2) is provided with the prestressed reinforcing bars (9) four root.

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