论文部分内容阅读
为防止因局部构件破坏而引起整体结构的连续倒塌,针对横琴发展大厦巨型转换桁架-钢支撑筒框架结构的高危结构单元进行拉索松弛、崩断,桁架层杆件失效,角柱失效以及角柱受汽车冲击等情况下的结构连续倒塌分析,采用MIDAS/Gen软件对剩余结构进行线弹性静力分析,构件破坏根据GSA 2003简化的评估准则以及钢构件应力控制法判断。分析结果表明,该结构有较高的抗连续倒塌的能力,对于含结构拉索、桁架层且层刚度突变的该类结构,建议桁架层中部杆件适当增大刚度及承载能力,筒内支撑强度和刚度也需加强,柱子做适当汽车防撞处理。
In order to prevent the continuous collapse of the whole structure caused by the failure of local components, aiming at the high-risk structural elements of the huge conversion truss-steel support frame structure of Hengqin Development Building, the cable slack, collapse, truss layer failure, corner column failure and corner column Under the conditions of continuous vehicle collapse and other structural collapse analysis, the remaining structures were linearly elastostatically analyzed by MIDAS / Gen software. The component failure was judged according to GSA 2003 Simplified Evaluation Criteria and Steel Member Stress Control Method. The results show that the structure has a high capability of continuous collapse. For such structures with structural cables and truss layers with sudden changes in stiffness, it is suggested that the middle part of the truss layer should increase the rigidity and bearing capacity properly, The strength and stiffness also need to be strengthened, and the pillars should be handled properly against collision.