钢框架柱抗爆简化分析模型研究  

Simplified Model for Analysis of Steel Frame Column Subjected to Blast Loading

作　　者：杨涛春[1,2] 李国强[1,3] 陆勇[4] 陈素文[1,3] Yang Taochun;Li Guoqiang;Lu Yong;Chen Suwen(School of Civil Engineering,Tongji University,Shanghai 200092,China;School of Civil Engineering and Architecture,University of Jinan,Ji’nan 250022,China;State Key Laboratory for Disaster Reduction in Civil Engineering,Tongji University,Shanghai 200092,China;School of Engineering,The University of Edinburgh,Edinburgh EH9 3JL,UK)

机构地区：[1]同济大学土木工程学院,上海200092 [2]济南大学土木建筑学院,济南250022 [3]同济大学土木工程防灾国家重点实验室,上海200092 [4]爱丁堡大学工程学院

出　　处：《天津大学学报（自然科学与工程技术版）》2017年第2期188-197,共10页Journal of Tianjin University：Science and Technology

基　　金：国家自然科学基金重大国际合作项目(51120185001)~~

摘　　要：钢框架中其他构件对柱端的约束是影响柱子抗爆响应特征的重要参数.为得到钢框架中受爆柱的合理抗爆分析模型,简化抗爆分析过程,以数值计算为基础,分析钢框架其他构件和楼层分布质量对受爆柱端约束的影响规律,并在此基础上推导得到受爆柱端约束的理论计算方法.结果表明:在爆炸荷载作用下,求解柱端约束时,可仅考虑与柱端直接相连的梁柱构件的约束作用,而这些构件的远端可简化为固定端;楼层分布质量的存在可减小柱端的位移响应,柱端所处楼层的分布质量对柱子响应影响显著;通过将与受爆柱端直接相连的梁柱构件等效为柱端的横向、竖向和转动约束弹簧及集中质量,可得到柱端约束模型及其计算方法.最后,通过与实际钢框架抗爆的整体分析模型对比,验证了钢框架柱简化分析模型的正确性.The column end constraint from other components in steel frame is an important factor which have a significant effect on the response of columns under blast loading. To derive a rational simplified model and simplify the blast-resistance analysis process for column in steel frame, the effect of adjacent components and the distributed mass of floors on the response of critical column are studied through numerical analysis. The results show that the contributionto the constraints include primarily beams and columns that are connected to the column directly, and these adjacent members can be simplified fixed at the far ends when calculating the constraints. The displacement at the constrainedcolumn end decreases because of the existence of floors mass. The distributed floor mass at the end of column significantly influence the column response. The directly connected members are represented by equivalent constraining springs and concentrated mass in horizontal, vertical and rotational directions,so the column end constraints model and its calculation method can be developed. The simplified blast-resistance model of column is verified through comparison with the response of the column in actual frames under blast loading.

关 键 词：钢框架柱 爆炸荷载 柱端约束 约束弹簧 简化模型 

分 类 号：TU393.2[建筑科学—结构工程]