立面收进超限结构弹塑性时程分析  

Elasto-Plastic Time History Analysis of a Super High-Rise Building with Setback in Elevation

作　　者：张博[1] 吴晓涵[1] 吕西林[1] 钱江[1] 

机构地区：[1]同济大学结构工程与防灾研究所,上海200092

出　　处：《结构工程师》2011年第6期34-40,共7页Structural Engineers

基　　金：国家自然科学基金中日国际合作项目(51022140006);国家重点基础研究发展计划973项目(2007CB714202)

摘　　要：上海嘉里静安综合发展项目南塔楼为超高层型钢混凝土框架—钢筋混凝土筒体结构。塔楼设有斜柱和加强层并有较大的立面收进,为立面规则性超限结构。文中采用NosaCAD有限元程序建立整体结构分析模型,通过7度多遇和7度罕遇烈度下的弹塑性时程分析,研究结构的变形、内力、破坏情况的发展历程。计算结果表明,小震情况下,结构构件未出现损坏。大震情况下,框架部分出现塑性铰的杆件未达到极限承载能力,筒体部分构件损坏顺序和分布较为合理,能在一定程度上耗散地震输入能量。结构最大层间位移角满足1/100的限值要求。结构可以满足小震不坏大震不倒的设防要求。The south tower of Kerry Center in Jing＇an Area is a super high-rise building with setback in elevation.It uses RC core and SRC frame structural system and contains inclined columns and strengthened stories.The calculation model of the overall structure was established in NosaCAD in the paper.The elasto-plastic time history analysis was carried out to study the seismic behavior of the structure like deformations,internal forces and damage patterns under the frequent and rare intensity of 7 degree earthquake.The results of the study showed that under the frequent earthquakes,there is no damaged element,under the rare earthquakes,yielding hinges occur on some elements of the frames but the structural components do not reach the ultimate carrying capacity.The order and distribution of damages on components of the tubes are reasonable,which can dissipate some dynamic energy.The maximum inter story drift of the building can meet the seismic design requirement of Chinese code.The structure satisfies the code requirements of no damage under frequent earthquake and standing without collapse under rare earthquake.

关 键 词：组合结构 弹塑性时程分析 立面收进 加强层 斜柱 

分 类 号：TU313[建筑科学—结构工程] TU398.9