适用于城市高层建筑群的震害预测模型研究

发布时间：2018-03-20 15:18

本文选题：区域震害分析　切入点：高层建筑　出处：《工程力学》2016年11期 　论文类型：期刊论文

【摘要】：高层建筑是城市建筑的重要组成部分,现有建筑震害预测模型难以满足城市区域高层建筑群震害分析的要求。该文提出了一套非线性多自由度弯剪耦合模型(NMFS)以及其参数标定方法。该模型:1)能模拟高层建筑显著的弯剪耦合变形行为。与传统的剪切层模型对比,该模型能准确的模拟高层建筑的层间位移角包络,其结果与精细有限元模型的结果非常接近;2)具有非常高的计算效率。与精细有限元模型对比,该模型的计算加速比超过60000倍;3)参数标定简单。仅需要借助于少量的建筑属性信息(结构高度、建设年代、设计信息和结构类型)就能生成整个模型的弹塑性参数;4)能输出各层时程响应以及层间位移角情况,使未来基于工程需求参数(EDP)的区域高层建筑经济损失预测成为了可能。论文针对一栋典型高层结构详细展示了模型的建立与标定流程,并对标定参数的准确性进行了校验。最后对北京CBD地区高层建筑群进行了震害模拟,验证了该方法在城市区域中应用的可行性。该文的成果期望为未来区域高层建筑的地震损失预测提供参考。
[Abstract]:High-rise buildings are an important part of urban buildings. The existing earthquake damage prediction models are difficult to meet the requirements of earthquake damage analysis of high-rise buildings in urban areas. This paper presents a set of nonlinear multi-degree-of-freedom bending shear coupling model (NMFS) and its parameter calibration method. The model: 1) can simulate high height. The remarkable bending and shear coupling deformation behavior of storey buildings. Compared with the traditional shear layer model, The model can accurately simulate the inter-story displacement angle envelope of high-rise buildings, and the results are very close to those of the fine finite element model. The calculation speedup ratio of the model is more than 60000 times 3) parameters are calibrated easily, and only a small amount of building attribute information (structural height, construction age) is needed. Design information and structure type) can generate the elastoplastic parameters of the whole model. It can output the time-history response of each layer and the displacement angle between layers. It is possible to predict the economic loss of regional high-rise building based on the engineering demand parameter EDP in the future. In this paper, the modeling and calibration process of a typical high-rise structure is presented in detail. The veracity of the calibration parameters is verified. Finally, the earthquake damage simulation of the high-rise buildings in CBD area of Beijing is carried out. The results of this paper are expected to provide a reference for earthquake damage prediction of high-rise buildings in the future.
【作者单位】：清华大学土木工程系土木工程安全与耐久教育部重点实验室;北京科技大学土木与环境工程学院;
【基金】：国家自然科学基金项目(51578320) 国家科技支撑计划项目(2015BAK14B02,2015BAK17B00) 中国地震局地球物理研究所基本科研专项项目(DQJB14C01)
【分类号】：P315.9;TU973.31

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