基于IDA方法的高强钢组合Y型偏心支撑框架的结构影响系数研究
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摘要
高强钢组合偏心支撑钢框架作为一种新型的抗震结构体系,我国抗震规范中未明确引入相应的结构影响系数.依据我国抗震规范设计了4个多高层高强钢组合Y型偏心支撑钢框架,采用增量动力分析(Incremental Dynamic Analysis)方法确定各算例的性能曲线,基于改进的能力谱方法确定了各算例的结构影响系数R和位移放大系数Cd.研究表明,高强钢组合Y型偏心支撑钢框架在设防烈度和罕遇烈度下变形均满足规范要求;结构影响系数可取R=4.889,位移放大系数可取
As a new anti-seismic structural system,the relevant structural behavior factor of high strength steel composite eccentrically braced frame,has not been introduced into current Chinese seismic code,4 multistory high strength steel composite Y-type eccentrically braced frames were designed on the basis of Chinese seismic code.The incremental dynamic analysis was carried out to get the global capacity spectrums of each model,and then the structural behavior factors R and the displacement amplification factors Cd were calculated by the improved capacity spectrum method.The seismic performance of the structures was studied.It was found that the structural deformation under moderate and rare earthquake can meet the requirements of Chinese codes.The value of the structure behavior factor is 4.889,and the value of the displacement amplification factor is Cd=6.693.It's conservative to design the new structural system based on the current Chinese codes.
As a new anti-seismic structural system,the relevant structural behavior factor of high strength steel composite eccentrically braced frame,has not been introduced into current Chinese seismic code,4 multistory high strength steel composite Y-type eccentrically braced frames were designed on the basis of Chinese seismic code.The incremental dynamic analysis was carried out to get the global capacity spectrums of each model,and then the structural behavior factors R and the displacement amplification factors Cd were calculated by the improved capacity spectrum method.The seismic performance of the structures was studied.It was found that the structural deformation under moderate and rare earthquake can meet the requirements of Chinese codes.The value of the structure behavior factor is 4.889,and the value of the displacement amplification factor is Cd=6.693.It's conservative to design the new structural system based on the current Chinese codes.
引文
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[13]VIDIE T,FAJFAR P,FISCHINGER M.Consistent inelastic design spectra:strength and displacement[J].Earthquake Engineering and Structural Dynamics,1994,23(3):507-521.
[2]HINES E.M,JACOB C.C.Eccentric braced frame system performance[J].Structures Congress,2010,1332-1341.
[3]DOUGLAS A.Foutch.Seismic of eccentrically braced steel building[J].Journal of Structural Engineering,1989,115,(8):1857-1876.
[4]于安林,赵宝成,李仁达,等.K形和Y形偏心支撑钢框架滞回性能试验研究[J].建筑结构,2010,40(4):9-12.YU Anlin,ZHAO Baocheng,LI Renda,et al.Experimental study on hysteretic behavior of K and Y-eccentrically braced steel frames[J].Building Structure,2010,40(4):9-12.
[5]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):88-93BAN Huiyong,SHI Gang,SHI Yongjiu,et al.Research advances on mechanical properties of high strength structural steels[J].Building Structure,2013,43(2):88-93.
[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]VAMVATSIKOS D..Seismic performance,capacity and reliability of structures as seen through incremental dynamics analysis[D].Department of Civil and Environmental Eng,Stanford University,2002.
[8]周颖,吕西林,卜一.增量动力分析法在高层混合结构结性能评估中的应用[J].同济大学学报,2010,38(2):183-193.ZHOU Ying,LüXilin,BO Yi.Application of incremental dynamic analysis to seismic evaluation of hybrid structure[J].Journal of Tongji University,2010,38(2):183-193.
[9]Federal Emergency Management Agency.NEHRP guidelines for the seismic rehabilitation of building[R].Report FEMA 273:Guidelines.Washington DC:FEMA,1997.
[10]Applied Technology Council.A critical review of current approaches to earthquake-resistant design:ATC-33,34,40[R].Rewood City,California:Applied Technology Council,1996.
[11]杨俊芬,顾强,何涛,等.用增量动力分析方法确定人字形中心支撑钢框架的结构影响系数和位移放大系数(I)-方法[J].地震工程与工程震动,2010,30(2):64-71.YANG Junfen,GU Qiang,HE Tao,et al.Response modification factor and displacement amplification factor for inverted V-CBSFs based on IDA(I):method[J].Journal of Earthquake Engineering and Engineering Vibration,2010,30(2):64-71.
[12]周定松,吕西林.延性需求谱在基于性能的抗震设计中的应用[J].地震工程与工程震动,2004,24(1):30-38.ZHOU Dingsong,LüXilin.Application of ductility demand ppectra in performance-based seismic design[J].Journal of Earthquake Engineering and Engineering Vibration,2004,24(1):30-38.
[13]VIDIE T,FAJFAR P,FISCHINGER M.Consistent inelastic design spectra:strength and displacement[J].Earthquake Engineering and Structural Dynamics,1994,23(3):507-521.
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