轮辐式大跨度张拉结构地震反应分析(Ⅰ)  

SEISMIC RESPONSE OF A RUNG-SHAPE LONG-SPAN TENSILE STRUCTURE (Ⅰ)

作　　者：冼耀强[1,2] 刘伯权[1] 丁江澍[1,3] 

机构地区：[1]长安大学建筑工程学院,西安710061 [2]招商局地产控股股份有限公司,广东佛山528000 [3]佛山市建筑工程质量检测站,广东佛山528000

出　　处：《工业建筑》2011年第4期112-118,共7页Industrial Construction

基　　金：佛山市科技专项发展基金(2007055B)

摘　　要：以世纪莲体育中心轮辐式大跨度张拉索膜结构为研究对象,采用ANSYS程序,建立有限元模型,分析地震波作用下结构的动力特性。结果表明:结构竖向刚度较小,垂跨比达到1/1 152;多遇烈度下的层间位移角达到1/467,水平向位移不可忽视;峰值加速度相同时,不同类型的地震波对该结构的地震反应差别不大;峰值加速度出现的先后对结构的振动影响甚微;随地震波峰值加速度增大,拉索轴应力几乎不变,但上、下压环及腹杆的弯曲应力变化较大;设计时,地震作用必须参与荷载组合,且应考虑地震波不同方向及多维组合作用的影响。Using the program,ANSYS,a finite element model of the rung-shape long-span tensile cable-membrane structure in Foshan Century Lotus Stadium was set up to investigate its dynamic performance under earthquake waves.Results show that the structure’s vertical stiffness is weak,and its sag-to-span ratio is 1 /1 152.Because its story drift is 1 /467,the structure’s horizontal displacement should not be neglect.The structure’s seismic responses are similar under different types of earthquake waves when their peak-accelerations are equal.At the same time,the order of the acceleration reaching its peak has small effects on the vibration of the structure.With the increase of the peak-acceleration,the axis stress of the tension cables does not vary,but the bending stress of the upper compression ring,the lower compression ring,and the truss web,has obviously changed.During the design process,seismic loading should be calculated in the load combination.Furthermore,the effects of the waves’direction and their combination should be considered.

关 键 词：轮辐式大跨度张拉结构 动力特性 地震作用 时程分析 

分 类 号：TU399[建筑科学—结构工程] TU352.1