某门球场钢结构倒塌原因分析及数值模拟

Analysis and numerical simulation of the cause analysis of a steel structure collapse in a gate-ball court

对某钢结构门球场的倒塌原因进行检测鉴定和有限元分析。首先,通过现场检测和调查可知,该结构存在明显的设计和施工缺陷;其次,采用有限元软件LS-DYNA再现了倒塌过程,结果表明:在恒载及突发雪荷载作用下,结构承载能力不足从而引起结构整体倒塌。因此,该结构未进行正规的设计、节点构造等施工质量缺陷是造成结构倒塌的根本原因。

Detection and identification and finite element analysis of the cause of the collapse are carried out for a steel structure in a gate-ball court.Firstly,through the field test and investigation,it could be found that the structure had obvious design and constructional defects.Secondly,the collapse process was reproduced by using LS-DYNA software.The results show that the structure carrying capacity is insufficient under the dead load and the action of sudden snow,which cause the whole collapse of the structure.Therefore,the structure was not formally designed,and there are joint construction and other construction quality defects,which are the root cause of the collapse of the structure.