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Damage Model of Multi-ribbed Slab Structure Based on Combination of Degrading Stiffness and Deformation

Author: WangMingDa
Tutor: YaoQianFeng
School: Beijing Jiaotong University
Course: Disaster Prevention and Reduction Engineering and Protective Engineering
Keywords: Ribbed composite wall Stiffness degradation Cumulative plastic deformation The dual parameters earthquake damage model
CLC: TU399
Type: Master's thesis
Year: 2008
Downloads: 76
Quote: 0
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Abstract


Ribbed composite wall structure is a new type of building structure system has a good seismic capacity and development prospects, it has achieved the important milestone in the theoretical and applied research. However, as a new type of structural system, relatively simple application form of complex force characteristics, structural damage model many restrictions Park model. In this paper, ribbed slab structure force component - ribbed composite wall for the study, based on analysis of existing damage parameters and several two-parameter seismic failure criterion, combined with the basic principles of damage mechanics and ribbed slab structure of its own characteristics, and using the method of testing means and theoretical analysis. Research and discussion focused on structural seismic damage model. Main contents and results are summarized as follows: 1. Use the point of view of the damage study ribbed composite wall collapse process under the earthquake's destruction, development and research status of earthquake damage theory are reviewed and injury problems three elaborate study level summary. Failure criterion based on the analysis of existing damage parameters and several two-parameter seismic, combined with the basic principles of damage mechanics and thermodynamics, and ribbed slab structure characteristics, the maximum displacement of the structural members at unloading stiffness degradation and normalized hysteretic energy consumption nonlinear combination of two damage parameter to express the degree of structural damage, and analyzed according to the results of the pre-ribbed composite wall low cyclic experiments to determine the model parameters, and eventually established ribbed composite wall the dual parameters earthquake damage model. 3. Quasi-static analysis of the the preliminary first batch of specimens and the second batch of specimens section wallboard IDARC6.1 program, repeated load test results using the quasi static hysteretic relationship, and according to the theoretical model comparative analysis of simulation force - displacement relationship IDARC program to get ribbed composite wall structure hysteretic rule parameters, the analysis of axial compression ratio, rib pillar quantity, rib pillar reinforcement ratio of shear span than the damage index. 4 The use of the proposed model and Park ribbed composite wall damage model were calculated damage index in different displacement amplitude, and are compared with the test results; analysis of the hysteretic energy share component seismic cumulative damage proportion of its relationship with the load path. The damage index corresponding provisions of the different level of destruction.

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CLC: > Industrial Technology > Building Science > Building structure > Other structures
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