(西安建筑科技大学结构工程与抗震教育部重点实验室，西安 710055)
［摘要］根据型钢混凝土(SRC)框架结构的特点，将其性能划分为基本完好、轻微损坏、中等破坏和防止倒塌四个水平，并用层间位移角限值予以量化；将SRC多自由度体系转化为等效单自由度体系，导出了相应的等效参数，并根据其性能水平确定出结构的目标位移。在此基础上，提出SRC框架结构基于位移的设计步骤，并依此对结构进行承载力设计，用静力弹塑性分析方法对所设计的SRC规则框架结构进行推覆分析，校核结构的侧移形状与初始设计侧移曲线是否一致，在不满足变形需求时，用推覆至该性能水平时的侧移曲线作为修正后的侧移曲线重新计算。算例分析表明，文中方法简便实用、结果精确，能够实现SRC框架结构基于位移抗震设计的目的。
［关键词］型钢混凝土框架结构；基于位移；性能水平；静力弹塑性分析
Research on displacement-based design method of steel reinforced concrete frame structures
Shi Qingxuan, Wang Qiuwei, Lei Jian(Key Laboratory of Structural Engineering and Earthquake Resistant, Ministry of Education, Xi’an University of Architecture & Technology, Xi’an 710055，China)
Abstract:The seismic performance of steel reinforced concrete (SRC) frames is divided into four levels which are basically well, slight destruction, secondary destruction and collapse prevention according to their characteristics, and the four levels are quantified with storey drift angle. The SRC multi-degree-of-freedom system is transformed into an equivalent single-degree-offreedom system and the corresponding parameters are derived, and the target displacement is also determined according to the corresponding performance levels. The displacement-based seismic design procedure of SRC structures is put forward, by which one regular SRC building is analyzed using Pushover analysis method, and the pushover drift curve is taken as the modified drift shape and the structure should be redesigned if the deformation resistance is insufficient. At last the numerical example shows that the method is accurate enough to achieve the aim of displacement-based seismic design of SRC structures.
Keywords:steel reinforced concrete frame structures; displacement-based; seismic performance levels; Pushover analysis
*高等学校博士学科点专项科研基金批准项目(20060703008)。
作者简介：史庆轩，教授，博导，Email：qingxuanshi@sina.com。
参考文献
［1］KOWALSKY M J, PRIESTLEY M J N, MACRAE G A. Displacement-based design of RC bridge columns in seismic region［J］. Earthquake Engineering and Structural Dynamics, 1995, (24): 1623-1643.
［2］钱稼茹，罗文斌. 建筑结构基于位移的抗震设计［J］. 建筑结构，2001，31(4)：201-209.
［3］MIRANDA E, GARCIA J G. Evaluation of approximate methods of estimate maximum inelastic displacement demands［J］. Earthquake Engineering and Structural Dynamics, 2002, 31(3): 539-560.
［4］SEAOC VISION 2000 Committee. Performance-Based Seismic Engineering［S］. Sacramento, California, US, 1995.
［5］GB50011—2001建筑抗震设计规范［S］. 北京：中国建筑工业出版社，2002.
［6］KOWALSKY M L. Displacement-based Design a Methodology for Seismic Design Applied to RC Bridge Columns［D］. University of California at San Diego, 1994.
［7］TAKEDA T, SOZEN M A, NIELSON N N. Reinforced concrete response to simulated earthquakes［J］. Journal of Structural Engineering, 1970, 96(12):2557-2573.
［8］JGJ138—2001/J130—2001型钢混凝土组合结构技术规程［S］. 北京：中国建筑工业出版社，2001.
［9］门进杰. 不规则钢筋混凝土框架结构基于性能的抗震设计理论和方法［D］. 西安：西安建筑科技大学, 2007.
［10］雷健. 型钢混凝土框架结构基于位移的抗震设计理论和方法［D］. 西安：西安建筑科技大学, 2008.