普通伸臂桁架与屈曲约束支撑型伸臂桁架最优布置方案分析
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摘要
以兰州金茂大厦为背景,选取其伸臂桁架的高度、跨度和截面尺寸作为变量,设计了5种不同布置形式普通伸臂桁架和相应的5种屈曲约束支撑型消能减震伸臂桁架,采用ANSYS有限元软件进行了静力非线性分析和滞回加载分析,应用目标函数法进行优化对比。结果表明:在5种普通伸臂桁架和相应的5种屈曲约束支撑型伸臂桁架中,双跨对角斜撑型布置形式分别为两类不同伸臂桁架中满足抗震要求的最优布置形式。在满足等刚度的原则下,屈曲约束支撑型伸臂桁架耗能能力明显高于普通伸臂桁架。采用双跨对角斜撑型布置形式的屈曲约束支撑型伸臂桁架是抗震性能更优的伸臂桁架布置形式。
Based on the Lanzhou Jinmao Tower,the height,span and section size of an outrigger truss in the Jinmao Tower were chosen as the parameters to design five different arrangement forms ordinary outrigger trusses and energy dissipation outrigger trusses with buckling restrained braces. ANSYS was applied to do static nonlinear analysis and hysteresis analysis,and target function method was adopted to achieve optimizing analysis. The results indicate that outrigger truss in the form of double diagonal braces is the best layout form whether in five ordinary outrigger trusses or in five energy dissipation outrigger trusses with buckling restrained braces. Under the principle of equal stiffness,the energy dissipation performance of outrigger trusses with buckling restrained braces is superior to that of ordinary outrigger trusses. Outrigger truss with buckling restrained braces in the form of double diagonal braces is more effective layout form.
Based on the Lanzhou Jinmao Tower,the height,span and section size of an outrigger truss in the Jinmao Tower were chosen as the parameters to design five different arrangement forms ordinary outrigger trusses and energy dissipation outrigger trusses with buckling restrained braces. ANSYS was applied to do static nonlinear analysis and hysteresis analysis,and target function method was adopted to achieve optimizing analysis. The results indicate that outrigger truss in the form of double diagonal braces is the best layout form whether in five ordinary outrigger trusses or in five energy dissipation outrigger trusses with buckling restrained braces. Under the principle of equal stiffness,the energy dissipation performance of outrigger trusses with buckling restrained braces is superior to that of ordinary outrigger trusses. Outrigger truss with buckling restrained braces in the form of double diagonal braces is more effective layout form.
引文
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[10]严红,潘鹏,王元清,等.一字形全钢防屈曲支撑耗能性能试验研究[J].建筑结构学报,2012,33(11):142-149.(YAN Hong,PAN Peng,WANG Yuanqing,et al.Experimental study of bucklingrestrained braces with in-line steel core plate encased in double web wide flange steel outer unit[J].Journal of Building Structures,2012,33(11):142-149.(in Chinese))
[2]徐培福,黄吉峰,肖从真,等.带加强层的框架-核心筒结构抗震设计中的几个问题[J].建筑结构学报,1999,20(4):2-10.(XU Peifu,HUANG Jifeng,XIAO Congzhen,et al.Some problems in aseismic design of frame-core wall structures with strengthened stories[J].Journal of Building Structures,1999,20(4):2-10.(in Chinese))
[3]Jeremiah C.Application of damping in high-rise buildings[D].Boston,USA:Massachusetts Institute of Technology,2006.
[4]Chen Y,Mc Farland D M,Wang Z,et al.Analysis of tall buildings with damped outriggers[J].Journal of Structural Engineering,ASCE,2010,136(11):1435-1443.
[5]武莲霞,余志伟,孙飞飞.屈曲约束支撑在带伸臂高层建筑中的应用[J].建筑结构,2011,41(增刊1):120-124.(WU Lianxia,YU Zhiwei,SUN Feifei.Application of buckling restrained braces in a high-rise structure with outriggers[J].Building Structure,2011,41(Suppl.1):120-124.(in Chinese))
[6]任重翠,徐自国,肖从真,等.防屈曲支撑在超高层建筑结构伸臂桁架中的应用[J].建筑结构,2013,43(5):54-59.(REN Chongcui,XU Ziguo,XIAO Congzhen,et al.Application of unbonded brace in super high-rise structure with cantilever truss[J].Building Structure,2013,43(5):54-59.(in Chinese))
[7]赵宪忠,王斌,陈以一,等.上海中心大厦伸臂桁架与巨柱和核心筒连接的静力性能试验研究[J].建筑结构学报,2013,34(2):20-28.(ZHAO Xianzhong,WANG Bin,CHEN Yiyi,et al.Monotonic static tests on outrigger truss and its connection with mega column and core tube of the Shanghai Tower[J].Journal of Building Structures,2013,34(2):20-28.(in Chinese))
[8]陈以一,王斌,赵宪忠,等.上海中心大厦伸臂桁架与巨柱和核心筒连接的抗震性能试验研究[J].建筑结构学报,2013,34(2):29-36.(CHEN Yiyi,WANG Bin,ZHAO Xianzhong,et al.Hysteretic tests on outrigger truss and its connection with mega column and core tube of the Shanghai Tower[J].Journal of Building Structures,2013,34(2):29-36.(in Chinese))
[9]刘畅,黄用军,何远明.伸臂桁架工作性能研究和设计建议[J].建筑结构,2013,43(9):57-61.(LIU Chang,HUANG Yongjun,HE Yuanming.Study and design suggestions on work performance of outrigger trusses[J].Building Structure,2013,43(9):57-61.(in Chinese))
[10]严红,潘鹏,王元清,等.一字形全钢防屈曲支撑耗能性能试验研究[J].建筑结构学报,2012,33(11):142-149.(YAN Hong,PAN Peng,WANG Yuanqing,et al.Experimental study of bucklingrestrained braces with in-line steel core plate encased in double web wide flange steel outer unit[J].Journal of Building Structures,2012,33(11):142-149.(in Chinese))