摘要
为分析采用螺旋式竖向收进钢束筒结构的抗震性能,通过对其建立有限元模型,进行了小震弹性分析和动力弹塑性分析,分别以结构构件对应于不同破坏状态的塑性转角、压弯构件的应变以及竖向构件的最大层间位移角为参考控制标评估构件损伤等级。结果表明,在多遇和罕遇地震作用下,螺旋式竖向收进钢束筒结构的层间位移角均能满足规范限值要求,具有良好的抗震性能;受损构件不足2%,没有出现严重损坏的构件,结构满足预期的C级抗震性能目标;螺旋式竖向收进钢束筒结构中部收进框筒单元顶部与未收进框筒单元交接处的构件为薄弱构件,在抗震设计时需着重加强或设计成耗能构件。
In order to analyze the seismic performance of the steel bundled-tube structure using spiral vertical setback,the small seismic elastic analysis and dynamic elastoplasticity analysis were carried out by establishing a finite element model,and the damage level of the components was evaluated by taking the plastic angle corresponding to different failure states of the structural member,the strain of the bending member and the maximum interlayer displacement angle of the vertical member as the reference control targets.The results show that under the action of many and rare earthquakes,the interlayer displacement angle of the structure can meet the requirements of the specification limit and have good seismic performance;the frame beam is the main damaged member,and the result of assessing the damage level of the member by the strain of the bending member is more delicate;less than 2%of the damaged components were damaged,no severely damaged components were present,and the structure met the expected C-class seismic performance targets;the component at the junction of the top of the retracted frame cylinder unit and the frame cylinder unit without setback in the middle of the structure are weak components,and it is necessary to focus on strengthening or designing them as energy-consuming components when designing for seismic resistance.
作者
郝勇
郝雪倩
陈丰
李岩松
韩天骄
彭帅杰
HAO Yong;HAO Xue-qian;CHEN Feng;LI Yan-song;HAN Tian-jiao;PENG Shuai-jie(Hebei University of Architecture,Zhangjiakou,Hebei 075000)
出处
《河北建筑工程学院学报》
CAS
2022年第3期24-30,共7页
Journal of Hebei Institute of Architecture and Civil Engineering
基金
河北建筑工程学院博士科研启动基金(B-201808)
河北建筑工程学院创新基金项目(XY202107)
关键词
竖向收进
钢束筒结构
动力弹塑性分析
抗震性能
vertical setback
steel bundled-tube structure
dynamic elastoplasticity analysis
seismic performance
