CN101457549B - Energy-dissipating and shock-absorbing joints of wood or bamboo frame structures - Google Patents

Abstract

The present invention relates to an energy-dissipating and shock-absorbing joint of an anti-seismic wood (bamboo) frame structure, which is characterized in that it comprises a post cover, a shock-absorbing piece and a U-shaped clip, wherein the shock-absorbing piece is connected with the post cover, and the frame beam 9 passes through the The U-shaped clip 6 is closely combined with the shock absorber to form a frame node with proper rigidity, strength and certain ductility. Advantages: First, rigid joints connect wooden (bamboo) beams and columns into a frame structure system with earthquake resistance, which does not require wall loads, can make full use of the mechanical properties of materials, and reduces cost; second, adopts energy dissipation Earthquake technology improves the safety of the structure; thirdly, the wood (bamboo) frame structure building with energy dissipation and shock absorption nodes is especially suitable for promotion in residential buildings in towns (villages) in my country. This kind of building can be produced in factories. The on-site installation avoids the situation that residents of towns (townships) and villages self-build houses without technical support and earthquake-resistant fortifications, and will greatly improve the safety and comfort of towns (townships) and village residents' self-built houses.

Description

Energy-dissipating and shock-absorbing joints of wood or bamboo frame structures

technical field

The invention relates to an energy-dissipating and shock-absorbing node of an anti-seismic wood (bamboo) frame structure, which belongs to the technical field of structural building materials.

Background technique

my country's traditional wooden structure buildings use log materials, and the beams and columns are connected by mortise and tenon joints. This structural system has two fatal weaknesses: (1) The joint connection strength is insufficient and the stiffness is small. Under the action of horizontal lateral force, it cannot form a stable geometric structure. Invariant system; (2) The ductility of the joints is small, and brittle failures are prone to occur under strong earthquakes. Studies have shown that such structures have poor seismic performance and low timber utilization. Since the 1970s in North America, a lot of research and development work has been done on wood structure buildings, especially in the development and application of wood structure residential buildings. Materials, these have become the main materials of residential buildings in Europe and the United States today, and the corresponding standards are relatively mature. In some developed countries in Europe and the United States, more than 90% of low-rise residences are wooden structures. However, wooden structures in Europe and the United States use densely packed wooden keels and high-strength wooden material panels to form a wall bearing system, that is, a shear wall structural system. Although this structural system has strong earthquake resistance, it consumes a lot of materials and costs more than 3,500 yuan. RMB/m ² is not suitable for promotion in towns (townships) and villages in China.

Contents of the invention

The purpose of the present invention is to propose a special energy-dissipating and shock-absorbing node for wood (bamboo) structures, and wood (bamboo) beams and columns are connected into a frame structure system with resistance to horizontal earthquakes. This structure system does not need wall bearings. Therefore, it is not only different from the traditional Chinese wood structure system, but also different from the wall-bearing wood structure system in North America, and it is innovative in two aspects of node connection and structural system.

The technical solution of the present invention: it is characterized in that it includes a column sleeve, a shock absorbing plate, a U-shaped card, a U-shaped sealing plate, and a nut, wherein the shock absorbing plate and the column sleeve are connected correspondingly, and the U-shaped card is connected by the sealing plate and the nut. The A frame beam, the B frame beam and the shock absorber are closely combined.

Advantages of the present invention: first, the rigid joints connect wooden (bamboo) beams and columns into a frame structure system with earthquake resistance, which does not require wall bearings, can make full use of the mechanical properties of materials, and reduces the cost; second, adopts The energy-dissipating and shock-absorbing technology improves the safety of the structure; thirdly, the wood (bamboo) frame structure building with energy-dissipating and shock-absorbing joints is especially suitable for promotion in residential buildings in towns (villages) in China. This kind of building can be used in Factory production and on-site installation avoid the situation that residents of towns (townships) and villages self-build houses without technical support and earthquake-resistant fortifications, and will greatly improve the safety and comfort of towns (townships) and village residents' self-built houses;

Description of drawings

Accompanying drawing 1 is a schematic diagram of the column sleeve structure in the energy-dissipating and shock-absorbing frame structure,

Accompanying drawing 2 is the structure schematic diagram of U-shaped card in the frame structure of energy dissipation and shock absorption,

Accompanying drawing 3 is a schematic diagram of the node structure in the energy-dissipating and shock-absorbing frame structure,

Accompanying drawing 4 is the connection schematic diagram of beam column and node in the frame structure of energy dissipation and shock absorption.

In the figure, 1 is the upper column sleeve, 2 is the lower column sleeve, 3 is the horizontal partition of the column sleeve, 4 is the upper shock absorber, 5 is the lower shock absorber, 6 is the U-shaped card, and 7 is the U-shaped card sealing plate , 8 is a nut, 9 is an A frame beam, 10 is a B frame beam, 11 is an upper frame column, and 12 is a lower frame column.

Detailed ways

Comparing with accompanying drawing 1, its structure is to comprise column cover, damping plate and U-shaped card 6 and U-shaped clamping plate, nut, and wherein shock absorbing plate and column cover are connected correspondingly, and U-shaped card 6 passes through sealing plate 8 and nut The A frame beam 9, the B frame beam 10 are closely combined with the damping sheet.

The column cover is divided into an upper column cover 1 and a lower column cover 2. There is a column cover transverse partition 3 in the middle of the upper column cover 1 and the lower column cover 2. The upper column cover 1 and the lower column cover 2 connect the upper frame column 11, the lower column cover The frame columns 12 are firmly connected.

The shock-absorbing sheet is divided into an upper shock-absorbing sheet 4 and a lower shock-absorbing sheet 5, and the upper shock-absorbing sheet 4 and the lower shock-absorbing sheet 5 are connected with the upper column cover 1 and the lower column cover 2 respectively, and the upper shock-absorbing sheet 4 1. The distance between the lower damping sheets 5 is equal to the section height of the beam plus 1 mm.

The A frame beam 9 and the B frame beam 10 are placed between the upper shock absorbing sheet 4 and the lower shock absorbing sheet 5 from the side of the node.

The U-shaped card 6 and the sealing plate 7 are fastened by nuts 8 .

The energy-dissipating and shock-absorbing joints have appropriate stiffness, strength and ductility. Under strong earthquakes, the frame consumes seismic energy input through the joints, ensuring the safety of columns and beams under strong earthquakes and avoiding brittle damage to the structure. Seismic fortification goals stipulated in the "Code for Seismic Design of Buildings".

The function of the column sleeve is to firmly connect the upper and lower columns into a whole, and to bear the internal force transmitted from the frame beam to the column. The function of the energy dissipation shock absorber is to fix the frame beam, bear the bending moment and shear force at both ends, and consume the seismic energy under the strong earthquake. The function of the U-shaped card is to fix the frame beam laterally, and fix the beam and the shock absorber as a whole. When the frame is installed, the frame beam is put into the shock-absorbing node from the side of the node, through the U-shaped card, the sealing plate and the nut beam Tightly combined with the shock absorber;

work process

The working principle of the energy dissipation and shock absorption joint is: the column sleeve connects the upper and lower columns into a whole, which ensures the connection strength of the upper and lower columns at the joint, and at the same time, the side plate of the column sleeve can improve the bending strength and shear resistance of the column end Strength: The vertical shear force of the frame beam is transmitted to the column through the column sleeve partition. This structure makes the full section of the column end under pressure without causing stress concentration at the column end. Compared with the bolt connection, the shear resistance of the joint can be greatly improved Bearing capacity: Under normal use conditions, the shock absorber and the column sleeve form a rigid node, connecting beams and columns into a frame that can resist lateral loads. Under strong earthquakes, the shock absorber withstands repeated loads, through its own nonlinear The deformation consumes the energy input of the earthquake. Through proper design, most of the deformation can be concentrated on the shock absorber, avoiding the brittle failure of wood (bamboo) materials, increasing the ductility of the structure, and plastic hinges appear on the beams, so that The structure can fully reduce the seismic response and ensure that the structure will not collapse under the action of a large earthquake exceeding the fortification intensity.

Claims (3)

1. wood or bamboo Wood (bamboo) frame construction energy dissipating and damping node, it is characterized in that comprising column sleeve, vibration damping sheet and U-shaped card and U-shaped card shrouding, nut, wherein vibration damping sheet is corresponding with column sleeve joins, the U-shaped cartoon is crossed U-shaped card shrouding and nut with the A-Frame beam, B Vierendeel girder and vibration damping sheet are combined closely, column sleeve divides goes up column sleeve and following column sleeve, in the middle of last column sleeve and the following column sleeve column sleeve diaphragm is arranged, last column sleeve will be gone up with following column sleeve, two-layer frame column closely connects down, vibration damping sheet divides goes up vibration damping sheet, following vibration damping sheet, last vibration damping sheet, following vibration damping sheet respectively with last column sleeve, following column sleeve correspondence is joined, last vibration damping sheet, distance between the following vibration damping sheet determines according to the depth of section of Vierendeel girder, and promptly the clear distance between the vibration damping sheet equals the beam section height and adds 1mm.

2. wood according to claim 1 or bamboo Wood (bamboo) frame construction energy dissipating and damping node, it is characterized in that described Vierendeel girder put into vibration damping sheet from the side of damping node, down between the vibration damping sheet.

3. wood according to claim 1 or bamboo Wood (bamboo) frame construction energy dissipating and damping node is characterized in that described U-shaped card and U-shaped card shrouding are fastening by nut.

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