基于實(shí)證數(shù)據(jù)的框架結(jié)構(gòu)地震損失評估
[Abstract]:The performance-based seismic design method can effectively reduce the socio-economic losses caused by earthquakes and is one of the main directions of seismic engineering development in the future. In the process of design, it is necessary to obtain the possible earthquake loss by evaluating the building performance and loss, and then to link the design scheme with the performance and loss. Based on the building performance and loss assessment method in FEMA P-58, this paper takes the RC frame structure which conforms to the design code of our country as the evaluation object, and completes the following research contents: 1. The design parameters affecting seismic behavior of frame joints are summarized and the design points of frame joints in Chinese and American codes are compared in detail. According to the flow chart of establishing vulnerability function, the performance grade classification and test data screening criteria are determined, and the effective data of 48 nodes are obtained by selecting 15 research papers. The probabilistic model of node vulnerability is calibrated by parameter estimation method, and the goodness of fit is tested. The test vulnerability model of frame joints is established by using logarithmic normal distribution. 2. The vulnerability of the infilled wall is studied by using the idea similar to that of the frame joint, and the screening criteria for the experimental data of the infilled wall are determined, 15 articles are selected, and 30 effective data of the wall are obtained. Based on the logarithmic normal distribution, the test vulnerability model of infilled walls is established. 3. In this paper, a new three-story frame structure with serious damage in the Ludian earthquake is selected as the research object, and the PERFORM-3D finite element model considering the infilled wall is established. The whole process of seismic response of the structure is demonstrated by elastic-plastic time-history analysis. The simulation results are compared with the actual earthquake damage, and the applicability of the model in the simulation of macroscopic earthquake damage is proved. Compared with the difference of seismic performance of the structure model with or without infilled wall, it is found that the residual deformation of the structure increases obviously after considering the infilled wall. Three far-field ground motions, three near-field pulsed ground motions, three near-field non-pulsed ground motions and Ludian Longtou Mountain ground motion records were selected as inputs. The structural requirements parameters under different intensity earthquakes were obtained by IDA analysis. The probabilistic model is analyzed. 4. 4. Based on the principle of FEMA P-58 performance and loss assessment, the performance model of the target structure (including the information of structure cost, component cost and quantity) is established, and the calculation program of structural economic loss is compiled. The seismic economic loss of the structure is evaluated by the method based on strength and time.
【學(xué)位授予單位】:中國地震局工程力學(xué)研究所
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2017
【分類號】:TU352.11
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