考虑楼板效应的钢结构地震反应对比分析.pdfVIP

22 3 Vol. 22 No. 3 2010 9 Journal of Gansu Sciences Sep. 2010 孙玉萍, 万婧娟, 刘 迪 ( , 730050) : 以10 层钢结构为研究对象, 在罕遇地震作用下, 通过ANSYS 有限元数值方法, 对纯框架 结构及 心耗能支撑结构在考虑楼板作用与不考虑楼板作用情况下结构的地震响应进行了比较分 析, 结果表明: 在考虑楼板作用下纯框架结构顶层位移X Y 方向分别减小了31. 3% 和33. 9%; 结构 顶层加速度X Y 方向分别增大了39. 7%和45. 2% . 由于楼板的约束效应, 结构的整体刚度增加, 自 振周期减小. 考虑比不考虑楼板作用同样的耗能结构耗能能力减小了, 在分析耗能结构时不能忽略 楼板作用.分析结果为钢结构抗震设计提供了参考. : 钢框架; 罕遇地震; 楼板效应; 心耗能支撑 : TU 391 : A :2010) Comparative Analysis of Earthquake Responses of Steel Frames under the Effect of Floor Slabs SUN Yuping, WAN Jingjuan, IU Di (School of Civ il Engineering , Lanz hou Univ ersity of Science and Technology , L anzhou 730050, China) Abstract: A 10layer steel structure is studied as the object under a rare earthquake action, the earthquake responses of a pure frame structure and an eccentrically energy dissipating brace structure are analyzed u sing ANSYS finite element numerical method.T he result show s that the top floor displacements in X and Y directions of the pure frame structure,when considering slab action were reduced by 31. 3% and 33. 9% re spectively in contrast with those without considering slab action.T he top floor accelerations in X and Y di rections of pure frame structure when considering slab action were increased by 39.7% and 45. 2% respec tively in contrast with those without considering slab action. Because of the constraint effect of floor effect, the natural cycle was decreased. The energy dissipated of the same energydissipating structure when con sidering slab action was reduced than that without considering slab action. T he slab action should not be neglected when we analyze the ener