考虑地震动谱形影响的钢筋混凝土框架结构抗倒塌能力评估

项目名称： 考虑地震动谱形影响的钢筋混凝土框架结构抗倒塌能力评估

项目编号： No.51268036

项目类型： 地区科学基金项目

立项/批准年度： 2013

项目学科： 建筑科学

项目作者： 韩建平

作者单位： 兰州理工大学

项目金额： 50万元

中文摘要： 基于倒塌率目标的抗震设计是结构抗震领域的主要发展方向，这就要求科学合理地评估结构的抗倒塌能力。而地震动的谱形特征及结构构件的强度、刚度退化特征对抗倒塌能力评估结果的影响很大。本项目着眼于提高结构抗倒塌能力评估结果的可靠性，就涉及的关键科学问题进行深入系统的研究，主要包括：选择汶川地震及其它典型地震动记录，深入分析地震动谱形特征及其对结构非线性响应的影响机理；通过复杂受力条件下构件滞回性能试验研究和数值模拟，研究考虑强度和刚度退化特征的构件滞回模型及主要控制参数；在此基础上，采用非线性动力分析和增量动力分析，研究可以考虑地震动谱形影响的地震动参数与结构非线性响应的相关性，提出充分且有效的地震动记录选择与调整方法；最后，通过对现有分析模型、分析方法及倒塌判别准则等的改进，提出考虑谱形影响、反映结构构件强度及刚度退化特征、基于概率的抗倒塌能力评估方法，为实现基于倒塌率目标的抗震设计奠定基础。

中文关键词： 地震动记录选择和调整；谱形；退化；增量动力分析；抗整体倒塌能力评估

英文摘要： Seismic design based on collapse probability under intense earthquakes is the main trend in the field of earthquake engineering. This makes it necessary to evaluate the collapse resistant capacity of the structures rationally. The characteristics of ground motion spectral shape influences the evaluation result of collapse resistant capacity as well as the characteristics of strength and stiffness deterioration of structural components. This project will focus on improving the reliabilty of evaluation results of collapse resistant capacity of the structures and the key scientific issues will be studied systematically. First, some qualified records from Wenchuan Earthquake and other earthquake events are chosen to investigate the characteristics of ground motion spectral shape and its influencing mechanism on nonlinear seismic responses of the structures. Second, in order to investigate strength and stiffness deterioration characteristics of structural components and the main governing parameters, a series of experimental and analytical simulation on structural components under complex combined actions will be conducted. Third, based on the aforementioned work, the correlation between the maximum seismic responses of the structures and selected ground motion parameters will be studied via nonlinear dynamic analys

英文关键词： selection and modification of ground motion record；spectral shape；deterioration；incremental dynamic analysis；global collapse resistance capacity evaluation