（西安建筑科技大学土木工程学院钢结构科研团队， 西安 710055）

［摘要］对一个单层单跨剪切屈服型高强钢组合K型偏心支撑框架试件的滞回性能进行了低周往复循环试验研究，并且建立了多个层数不同的高强钢组合K型偏心支撑框架和Q345钢K型偏心支撑框架有限元模型，对其滞回性能进行了非线性数值分析，对两种结构的承载力、强度退化、刚度退化、延性、耗能能力以及用钢量进行了对比。研究表明：在满足抗震要求的前提下，高强钢组合K型偏心支撑框架的抗震性能良好，略差于相同设计条件下Q345钢K型偏心支撑框架的，但是构件截面较小，可以节省钢材、降低造价，具有较高的经济效益。

［关键词］高强钢; 偏心支撑; 有限元; 滞回性能; 用钢量

中图分类号：TU391      文献标识码：A      文章编号：1002-848X(2014)17-0007-08

Numerical analysis on the seismic performance of high strength steel composite K-type eccentrically braced frames

Lian Ming, Su Mingzhou, Guo Yan

 (Research Team of Steel Structure, School of Civil Engineering, Xi′an University of Architecture and Technology, Xi′an 710055, China)

Abstract:The hysteretic behavior of K-type eccentrically braced frames with high strength steel combination (K-HSS-EBFs) with one-bay and single story was studied under cyclic loading. The finite element models with different stories both of K-HSS-EBFs and Q345 K-EBFs were established to carry out  the nonlinear numerical analyses for they hysteretic behavior. The bearing load capacity, stiffness degeneration, ductility, energy dissipation capacity and the usage of the steel of two structures were compared. The results indicate that the seismic performance of the K-HSS-EBFs is good,but slightly lower than that of Q345 K-EBFs with the same design conditions.The K-HSS-EBFs have smaller section of structural members and well meet the demands of the design codes and have highly economic efficiency by saving steel.

Keywords:high strength steel; eccentrical brace; finite element; hysteretic behavior; usage of steel

*国家自然科学基金项目(51178382)。

作者简介：连鸣，博士研究生，Email: lianming0821@163.com。

参考文献

［1］ROEDER C W, POPOV E P. Eccentrically braced steel frames for earthquake ［J］. Journal of Structural Division, 1978, 104(3): 391-412.

［2］HJELMSTAD K D, POPOV E P. Characteristics of eccentrically braced frames ［J］. Journal of the Structural Engineering, 1982, 110(2): 340-353.

［3］BOSCO M, ROSSI P P. Seismic behaviour of eccentrically braced frames ［J］. Engineering Structures, 2009, 31（3）: 664-674.

［4］戴国欣, 王飞, 施刚, 等. Q345与Q460结构钢材单调和循环加载性能比较［J］. 工业建筑, 2012, 42(1): 13-17.

［5］施刚, 石永久, 王元清. 超高强度钢材钢结构的工程应用［J］. 建筑钢结构进展, 2008, 10(4): 32-38.

［6］DUBINA D, STRATAN A, DINU F. Dual high-strength steel eccentrically braced frames with removable links［J］. Earthquake Engineering and Structural Dynamics, 2008, 37(15): 1703-1720.

［7］JGJ 99—98 高层民用建筑钢结构技术规程［S］. 北京: 中国建筑工业出版社, 1998.

［8］GB 50017—2010 建筑抗震设计规范［S］. 北京: 中国建筑工业出版社, 2010.

［9］班慧勇, 施刚, 石永久, 等. 建筑结构用高强度钢材力学性能研究进展［J］. 建筑结构, 2013, 43(2): 8894.

［10］黄羽立, 陆新征, 叶列平, 等. 基于多点位移控制的推覆分析算法［J］. 工程力学, 2011, 28(2):18-23.

［11］ELLINGWOOD B R. Earthquake risk assessment of building structures ［J］. Reliability Engineering and System Safety, 2001, 74（3）: 251-262.

［12］侯和涛, 邱灿星, 李国强, 等. 带节能复合墙板钢框架低周反复荷载试验研究［J］. 工程力学, 2012, 29(9): 177-192.

［13］PARK R. Ductility evaluation from laboratory and analytical testing ［C］//Proceedings of Ninth World Conference on Earthquake Engineering. Tokyo,1988:605-616.