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Earthquake damage assessment method for short-leg shear wall structure

An earthquake damage and shear wall technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problem of no convenient and accurate assessment method for damage, and achieve a simple, easy-to-implement and reliable estimation or assessment method. Effect

Inactive Publication Date: 2017-12-12
NANJING FORESTRY UNIV
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Problems solved by technology

[0005] The purpose of the present invention is to provide an earthquake damage assessment method for short limb shear wall structures, which solves the problem that there is no convenient and accurate assessment method for the damage of such structures under earthquake action

Method used

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  • Earthquake damage assessment method for short-leg shear wall structure
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  • Earthquake damage assessment method for short-leg shear wall structure

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Embodiment 1

[0020] Embodiment 1: A 12-storey short-leg shear wall structure residential building is used as a model to model. The total height of the structure is 35.1m, the height of the first floor is 3.2m, and the height of the remaining floors is 2.9m. The thickness of the wall pier of the shear wall is 200mm, the concrete strength grade of the shear wall is C35, and the concrete strength grade of the beam and slab is C30. The main reinforcement of shear wall and connecting beam adopts HRB335, and the stirrup adopts HPB300. The site category of the building is Class III, the seismic fortification intensity is 7 degrees 0.1g, the design earthquake group is the first group, and the seismic wave is Taft wave. Using ABAQUS finite element software to establish the calculation model of the short-limb shear wall structure, calculate the natural frequency of the structure, and use the first frequency as the external excitation frequency to obtain the first failure form of the structure, as sh...

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Abstract

The invention discloses an earthquake damage assessment method for a short-leg shear wall structure. A computing model is built by adopting finite element software, wherein a wall body and floor slabs adopt shell units; coupling beams and secondary beams adopt beam units; steel bars are defined as layers to be embedded in members; and an autooscillation circular frequency of the structure is calculated. Damage distribution of the short-leg shear wall structure under translational resonance excitation is calculated by adopting a concrete plastic damage constitutive model; a state of damage of cross sections of all wall legs is obtained by continuously adding excitation amplitude; a basic destruction form is obtained; and at the moment, corresponding plastic energy consumption is limited plastic energy consumption of the structure. An earthquake wave is subjected to wavelet packet decomposition to form sub-waves taking the autooscillation frequency of the structure as a center; and plastic energy consumption demands of the sub-waves are calculated. Structure safety is judged; a safe structure is judged; and an overall damage index of the structure is calculated; and a damage level is judged. The method has the beneficial effect that the overall damage level of the short-leg shear wall structure under the action of an earthquake can be accurately and reliably estimated or assessed.

Description

technical field [0001] The invention belongs to the technical field of buildings and relates to an earthquake damage assessment method for a short-limb shear wall structure. Background technique [0002] Earthquake is an unpredictable natural phenomenon. A destructive earthquake exceeding the design intensity is very likely to occur. Once it occurs, it will cause inestimable losses. The "5.12" Wenchuan Earthquake gave us a stern warning. The short-leg shear wall structure is a new structural system between the shear wall and the special-shaped column, and its width-thickness ratio is between 5 and 8. Because this structural system has the advantages of both frame and shear wall, it is widely used in residential construction in our country. The short-leg shear wall structure is developed from the general shear wall structure, and absorbs the advantages of the special-shaped column structure without corrugated corners in the room. At the same time, it is easier to meet variou...

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/13G06F30/23
Inventor 孙敦本徐莹
Owner NANJING FORESTRY UNIV
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