拱壳杂交钢结构的防连续倒塌分析  

Analysis on Progressive Collapse of Conservatory Steel Structure

作　　者：石永久[1] 高阳[1] 王元清[1] 张昭一[2] 李国星 刘健[2] 

机构地区：[1]清华大学土木工程系,北京100084 [2]中国建筑科学研究院深圳分院,广东深圳518057 [3]珠海晶艺玻璃工程有限公司,广东珠海519070

出　　处：《沈阳建筑大学学报（自然科学版）》2010年第5期817-822,共6页Journal of Shenyang Jianzhu University：Natural Science

基　　金：KGE研究基金项目(200802);国家十一五科技支撑计划重点项目(2006BAJ03A02-1)

摘　　要：目的验算新加坡植物园展览温室拱壳杂交钢结构的抗连续倒塌能力.方法采用常用的改变传力路径方法,选取结构的初始破坏状态以及计算工况,运用ANSYS有限元软件对结构进行静力分析、特征值屈曲分析及荷载位移全过程分析.结果与完善结构相比,局部失效结构的内力及变形有较大提高,屈曲模态发生明显变化,结构在2.5倍左右的标准荷载作用下仍能继续承载.结论该结构在设定的初始破坏情况下不会发生连续倒塌,仍具有一定的整体性和延性,可见其具有良好的抗连续倒塌能力.The study is carried out on progressive collapse analysis of the conservatory arch-reticulated shell hybrid steel structure at gardens by the bay in Singapore.The usual alternate path method is adopted,with the reasonable initial damage situation and load cases are chosen.The linear static analysis,eigen value buckling analysis and elasto-plastic full range analysis are carried out with ANSYS.The usual alterrate path mcthod is adopted and the reasonable initial demage situation and load cases are chosen.The linear static aralysis,eigen value buckling analysis and ecasto-plastic full range analysis are cartied out with ANSYS.The result shows that,in comparison with perfect structure,the damage one gets higher stress and displacement,and its buckling model changes obviously.However,it can still keep on bearing when the factor of the standard load is up to about 2.5 times.In conclusion,the progressive collapse won′t happen under the given initial damage condition,and the structure has good integrity and ductility,and so does the anti-progressive collapse capacity.

关 键 词：拱壳杂交结构 连续倒塌 改变传力路径法 线弹性静力分析 非线性静力分析 

分 类 号：TU398.9[建筑科学—结构工程] TU317.103