带加强层高层建筑直接基于位移的抗震设计(Ⅱ)——算例分析
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摘要
基于带加强层高层建筑结构的特点,根据论文(I)所提出直接基于位移的抗震设计方法,对一幢带有2个加强层的超高层建筑结构进行了基于位移的抗震设计。设定结构的目标性能水准为中震作用下结构"使用良好"以及大震作用下"保证人身安全"。中震作用下结构"使用良好",结构处在弹性阶段,结构分析及参数计算采用弹性方法。大震作用下结构"保证人身安全",结构进入弹塑性工作阶段,结构分析及参数计算考虑弹塑性特点。设计过程的特点突出:关键楼层的提出、选取均体现了带加强层高层建筑结构的受力变形特点;考虑高阶振型数量的选择、水平地震作用的计算充分体现了方法实用性;在地震作用的计算、结构性能的控制方面提出了一些改进和新思路。设计过程验证了所用直接基于位移抗震设计方法的有效性、可行性以及实用性。
Based on the mechanical characteristics of highrise structures with strengthened stories,the authors performed a direct displacement based seismic design for a highrise structure with 2 strengthened stories according to the direct displacement based seismic design principle.The performance levels were set to be "serviceability" under moderate earthquake and "life safety" under major earthquake,respectively.The structure was in elastic stage for the performance of "serviceability" under moderate earthquake,so in the structure analysis and the parameter calculation we adopted the elastic method.For the performance of "life safety" under major earthquake,the structure was in elasto-plastic stage and in the structure analysis and parameter calculation,we considered the effect of plastic deformation.The design procedures have the following features:(1) definition and selection of "key" stories are based on the mechanical characteristics of highrise structures with strengthened stories;(2) determination of mode number and the calculation of horizontal earthquake action verify the applicability of the design procedure;(3) some new ideas are proposed to improve the earthquake action calculation and structural performance control.The design procedures verify the effectiveness,feasibility and applicability of the proposed direct displacement based seismic design method.
Based on the mechanical characteristics of highrise structures with strengthened stories,the authors performed a direct displacement based seismic design for a highrise structure with 2 strengthened stories according to the direct displacement based seismic design principle.The performance levels were set to be "serviceability" under moderate earthquake and "life safety" under major earthquake,respectively.The structure was in elastic stage for the performance of "serviceability" under moderate earthquake,so in the structure analysis and the parameter calculation we adopted the elastic method.For the performance of "life safety" under major earthquake,the structure was in elasto-plastic stage and in the structure analysis and parameter calculation,we considered the effect of plastic deformation.The design procedures have the following features:(1) definition and selection of "key" stories are based on the mechanical characteristics of highrise structures with strengthened stories;(2) determination of mode number and the calculation of horizontal earthquake action verify the applicability of the design procedure;(3) some new ideas are proposed to improve the earthquake action calculation and structural performance control.The design procedures verify the effectiveness,feasibility and applicability of the proposed direct displacement based seismic design method.
引文
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[8]杨克家,梁兴文.带加强层高层建筑结构直接基于位移的抗震设计[J].地震工程与工程振动,2011,31(5):174-181.
[9]梁兴文,黄雅婕,杨其伟.钢筋混凝土框架结构基于位移的抗震设计方法研究[J].土木工程学报,2005,38(9):53-61.
[2]钟善桐,刘大林.刚伸臂在钢管混凝土高层框筒结构体系中的工作性能[J].哈尔滨建筑大学学报,2002,35(1):12-19.
[3]程绍革,刘经伟.上海仙乐斯广场模型振动台试验[J].建筑科学1998,14(5):8-13.
[4]蒋利学,胡绍隆.钢筋混凝土超高层建筑层间位移的模型试验研究[J].建筑结构,2001,31(1):3-6.
[5]邱仓虎,詹永勤,吴彦明.深圳罗湖商务大厦结构修改设计[J].建筑结构学报,2003,23(3):80-84.
[6]徐培福,傅学怡,王翠坤.复杂高层建筑结构设计[M].北京:中国建筑工业出版社,2005.
[7]杨克家,梁兴文,李波.带加强层超高层结构受力性能研究及设计建议[J].建筑结构,2008,38(2):111-115.
[8]杨克家,梁兴文.带加强层高层建筑结构直接基于位移的抗震设计[J].地震工程与工程振动,2011,31(5):174-181.
[9]梁兴文,黄雅婕,杨其伟.钢筋混凝土框架结构基于位移的抗震设计方法研究[J].土木工程学报,2005,38(9):53-61.
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