全铸钢结构塔铸钢件极限承载力试验研究  

Experimental research on ultimate loading capacity of cast steel elements in cast steel tower

作　　者：杨渊[1] 陈志华[1] 马克俭[1,2] 王小盾[1] 

机构地区：[1]天津大学,天津300072 [2]贵州大学,贵州贵阳550003

出　　处：《土木工程学报》2015年第9期31-40,共10页China Civil Engineering Journal

基　　金：天津市建交委科技项目(2012-13)

摘　　要：天津文化中心迎宾塔是国际上第一座主体结构为全铸钢结构的建筑,其主体结构通过铸钢件焊接形成。由于主体结构的力学性能与铸钢件直接相关,因此对其两种标准铸钢件进行在最复杂荷载工况下足尺模型的破坏性试验,并利用ANSYS软件进行相应的弹塑性有限元分析和其他典型荷载工况下的有限元分析。根据试验和有限元分析结果,得到试件在最复杂荷载工况中,设计和破坏荷载作用下的应力分布情况、荷载-位移曲线和破坏形态;得到试件在其他典型荷载工况中,设计和破坏荷载作用下的应力分布情况和破坏形态。结果表明,所采用的两种标准铸钢件的极限承载力在相应设计荷载的3倍以上,标准铸钢件具有足够的安全储备,可以满足"强节点弱杆件"的设计要求。Yingbin Tower in Tianjin Cultural Center is the first building in which the main structure completely applies cast steel in the world, and it was made of cast steel elements by welded connections. In order to study the mechanical properties of the main structure, experiments and the corresponding elastic-plastic finite element analysis on two full scale models of standard cast steel elements were carried out under the most complicated load case, and the finite element analysis for other typical load cases were also done by ANSYS. According to the experiment and finite element analysis results, the stress distribution, load-displacement curve and failure mode under the design and ultimate loads were obtained in the most complicated load case. The stress distribution and failure mode under the design and ultimate loads were also gained in other typical load cases. It is shown that the ultimate capacity of the standard cast steel element is more than 3 times of the design load. The standard cast steel elements have enough safety stock and meet the design requirement.

关 键 词：铸钢 铸钢节点 铸钢件 铸钢结构 极限承载力 破坏性试验 有限元分析 

分 类 号：TU392.6[建筑科学—结构工程]