钢筋混凝土框架边柱突然失效模拟试验与分析研究

发布时间：2018-11-13 07:50

【摘要】：在偶然荷载作用下结构的失效机理是结构设计研究的重要内容。为研究框架结构在边柱突然失效瞬间结构的动力反应、内力重分布和破坏形态,湖南大学与美国南加州大学(USC)、美国加州大学戴维斯分校(UCDAVIS)、美国国家标准技术研究所(NIST)共同进行了1/2比例的3层3跨钢筋混凝土空间框架的倒塌试验。通过研究破坏瞬间结构的位移反应、加速度反应、钢筋应变和裂缝分布情况,揭示结构在竖向构件突然失效时结构的抗倒塌性能。研究结果表明按照抗震规范进行设计的框架结构在底层单个边柱突然失效时具有较好的抗连续倒塌性能,动力效应对结构的影响并不显著。并采用SAP2000有限元软件对结构在竖向构件突然失效时的位移反应、内力变化进行模拟分析,分析结果与试验结果吻和良好。
[Abstract]:The failure mechanism of structure under accidental load is an important part of structural design. In order to study the dynamic response, internal force redistribution and failure pattern of frame structure at the moment of sudden failure of edge column, Hunan University and University of Southern California (USC), University of California (UCDAVIS), University of California (USC), United States of America (USC), (UCDAVIS), The National Institute of National Standards and Technology (NIST) has conducted a 1 / 2 scale collapse test of a 3-story 3-span reinforced concrete space frame. By studying the displacement response, acceleration response, reinforcement strain and crack distribution of the structure at the moment of failure, the anti-collapse performance of the structure under the sudden failure of vertical members is revealed. The results show that the frame structure designed according to the seismic code has better resistance to continuous collapse in the case of sudden failure of a single side column at the bottom, but the effect of dynamic effect on the structure is not significant. The SAP2000 finite element software is used to simulate the displacement response and internal force change of the structure when the vertical member suddenly fails. The result of the analysis is good to the test result.
【作者单位】：湖南大学建筑安全与节能教育部重点实验室;湖南省建筑设计院;南加州大学;加州大学戴维斯分校;美国国家标准及技术研究院;
【基金】：“985”工程专项经费(531106004003),“千人计划”专项经费(531106004009)
【分类号】：TU375.4;TU317.1

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