摘要
为研究相关结构抗连续倒塌能力,应用OpenSEES有限元软件建立结构的三维模型,对某高层框架结构托梁拔柱的施工过程进行模拟,对改造前后结构抗连续倒塌能力进行分析。利用OpenSEES有限元软件中共用节点单元和remove element命令,实现对钻孔截柱过程的模拟,模拟得到被拔柱的柱顶竖向位移全过程曲线,与实测被拔柱顶竖向位移曲线吻合良好。利用OpenSEES有限元软件以非线性动力拆除构件法计算得到改造前后拔柱处竖向位移时程曲线和钢筋最大伸长率,依据国内外的连续倒塌判定准则。研究结果表明:该房屋在改造前后均具有足够的抗连续倒塌能力,该模拟分析方法可供类似加固改造工程设计和施工监控参考。
In order to study the resistance of related structures to progressive collapse, the finite element software OpenSEES? was used to establish a three-dimensional(3 D) model of the structures of interest to simulate the column removing and beam supporting construction process of a high-rise frame structure, and the resistance of the structures to progressive collapse before and after the reconstruction was analyzed. The process of drilling and cutting columns was simulated by using the common node elements and "remove element" commands in the OpenSEES. The simulated values of the whole process of vertical displacement curve at the top point of the removed columns are in good agreement with the measured values. The time history curve of vertical displacement at the top point of removed columns and the maximum elongation of the steel bars of the structures before and after reconstruction were calculated by the nonlinear dynamic demolition component method using OpenSEES software. According to the progressive collapse criterion at home and abroad, the analyzed results show that the structure has sufficient resistance before and after the reconstruction. The simulation and analysis method can be used as a reference for the design and construction monitoring of such reconstruction engineering.
作者
唐昌辉
梁欣易
TANG Changhui;LIANG Xinyi(School of Civil Engineering,Hunan University,Changsha 410082,China)
出处
《铁道科学与工程学报》
CAS
CSCD
北大核心
2019年第12期3068-3077,共10页
Journal of Railway Science and Engineering
基金
国家自然科学基金资助项目(51878268)
关键词
改造加固
托梁拔柱
施工过程模拟
连续倒塌
OPENSEES
reconstruction and strengthening
column removing and beam supporting
construction process simulation
progressive collapse
OpenSEES
