平面不规则RC框剪结构基于性能的减震设计方法
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摘要
在引入最不利输入角度的基础上,运用改进的基于多模态推覆分析法对平面不规则RC框剪结构进行减震设计。首先,利用MATLAB小波变换系数法,判别地震动的最不利输入角度;然后,根据结构提出的性能目标,以多模态推覆分析的设计方法为主,结合能力谱法计算结构所需的附加阻尼比,选择相应的粘滞阻尼器,合理布置阻尼器的位置;最后,利用扭转角能力法对比分析原结构和减震结构的抗扭性能。分析结果表明:对于平面不规则RC框剪结构,地震动输入角度对结构的抗震性能有不可忽略的影响;利用改进的基于多模态推覆分析法对结构进行减震设计后可达到预先提出的性能目标,减小结构的扭转位移比,提高结构的抗震性能。
Based on the introduction of the critical angle, design of irregular plane RC frame-shear-wall structure was achieved using the improved multimode pushover analysis method. First, the critical angle of seismic wave was determined using the wavelet transform in MATLAB. Second, based on the performance requirement from the designed structure, the multimode pushover analysis method and the capacity spectrum were used to calculate the supplement damping ratio, and the corresponding viscous damper was selected and placed properly. Finally, the seismic performance was evaluated using the torsional angle capacity method. The results indicate that the critical angle of seismic wave show significant influence on the performance of the irregular plane RC frame-shear-wall structure. Meanwhile, the structural design based on the improved multimode pushover analysis method can achieve the expected purpose. Furthermore, the method can lead to significantly reduced structural torsional displacement ratio and highly improved structural seismic performance.
Based on the introduction of the critical angle, design of irregular plane RC frame-shear-wall structure was achieved using the improved multimode pushover analysis method. First, the critical angle of seismic wave was determined using the wavelet transform in MATLAB. Second, based on the performance requirement from the designed structure, the multimode pushover analysis method and the capacity spectrum were used to calculate the supplement damping ratio, and the corresponding viscous damper was selected and placed properly. Finally, the seismic performance was evaluated using the torsional angle capacity method. The results indicate that the critical angle of seismic wave show significant influence on the performance of the irregular plane RC frame-shear-wall structure. Meanwhile, the structural design based on the improved multimode pushover analysis method can achieve the expected purpose. Furthermore, the method can lead to significantly reduced structural torsional displacement ratio and highly improved structural seismic performance.
引文
[1]Mohammadjavad Hamidia,Andre Filiatrault,Amjad Aref.Seismic collapse capacity–based evaluation and design of frame buildings with viscous dampers using pushover analysis[J].Journal of Structural Engineering,2015,141(6):1―12.
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[13]门进杰,史庆轩,周琦.平面不规则钢筋混凝土框架结构基于性能的抗震评估方法[J].土木工程学报,2008,41(9):60―67.Men Jinjie,Shi Qingxuan,Zhou Qi.Method of performance based seismic evaluation for irregular plane reinforced concrete frame structures[J].China Civil Engineering Journal,2008,41(9):60―67.(in Chinese)
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[15]郭子雄,吕西林,王亚勇.建筑结构在罕遇地震下弹塑性变形验算的讨论[J].工程抗震,1999(1):13―19.Guo Zixiong,LüXilin,Wang Yayong.Discussion about calculation for elastic-plasti deformation under rare earthquake action[J].Earthquake Resistant,1999(1):13―19.(in Chinese)
[16]沈蒲生,龚胡广.双线性单自由度体系(SDOF)弹塑性位移比的研究[J].工程抗震与加固改造,2006,28(2):1―5.Shen Pusheng,Gong Huguang.Study of the inelastic displacement ratios for SDOF systems[J].Earthquake Resistant Engineering and Retrofitting,2006,28(2):1―5.(in Chinese)
[2]李刚,李宏男.基于位移的消能减震结构抗震设计方法[J].工程力学,2007,24(9):88―94.Li Gang,Li Hongnan.Displacement-based design for buildings with passive energy dissipation devices[J].Engineering Mechanics,2007,24(9):88―94.(in Chinese)
[3]蒋建,吕西林,翁大根.附加黏滞阻尼器减震结构基于性能的抗震设计方法[J].力学季刊,2009,30(4):577―586.Jiang Jian,LüXilin,Weng Dagen.Performance based seismic design method for structures with supplemental viscous dampers[J].Chinese Quarterly of Mechanics,2009,30(4):577―586.(in Chinese)
[4]Chopra A K,Goel R K.A modal pushover analysis procedure for estimating seismic demands for buildings[J].Earthquake Engineering and Structural Dynamics,2002,31(3):561―582.
[5]吴学淑,王翠坤.基于多模态的耗能减震设计[J].土木工程学报,2009,42(9):1―6.Wu Xueshu,Wang Cuikun.Multimode based design method for buildings with dissipation devices[J].China Civil Engineering Journal,2009,42(9):1―6.(in Chinese)
[6]Lagaros N D.Multi-component incremental dynamic analysis considering variable incident angle[J].Structure and Infrastructure Engineering,2010,6(1/2):77―94.
[7]尹犟,易伟建,胡其高.结构整体抗震性能评估新方法[J].工程力学,2010,27(3):123―131.Yin Jiang,Yi Weijian,Hu Qigao.The new method for estimating seismic performance of structures[J].Engineering Mechanics,2010,27(3):123―131.(in Chinese)
[8]何晓宇,李宏男.海洋平台确定多维地震动最不利输入方向的一种有效方法[J].振动与击,2007,26(12):49―54.He Xiaoyu,Li Hongnan.Application of wavelet transform in muti-components seismic response of offshore platform[J].China Civil Engineering Journal,2007,26(12):49―54.(in Chinese)
[9]陆新征,叶列平,缪志伟,等.建筑抗震弹塑性分析-原理、模型与在ABAQUS,MSC.MAR和SAP2000上的实践[M].北京:中国建筑工业出版社,2009:38―56.Lu Xinzheng,Ye Lieping,Miao Zhiwei,et al.Elasto-plastic analysis of building against earthquake-theory,model and implementation on ABAQUS,MSC.MAR and SAP2000[M].Beijing:China Building Industry Press,2009:38―56.(in Chinese)
[10]FEMA:Improvement of static nonlinear analysis procedures[R].Washington,D.C:Federal Emergency Management Agency,2005.
[11]GB50011-2010,建筑抗震设计规范[S].北京:中国建筑工业出版,2010.GB50011-2010,Code for seismic design of buildings[S].Beijing:China Building Industry Press,2010.(in Chinese)
[12]Seleemah A A,Constantinou M C.Investigation of seismic response of buildings with linear and nonlinear fluid viscous dampers[R].Rep.No.NCEER-97-0004,National Center for Earthquake Engineering Research,State University of New York at Buffalo,Buffalo,N.Y,2002.
[13]门进杰,史庆轩,周琦.平面不规则钢筋混凝土框架结构基于性能的抗震评估方法[J].土木工程学报,2008,41(9):60―67.Men Jinjie,Shi Qingxuan,Zhou Qi.Method of performance based seismic evaluation for irregular plane reinforced concrete frame structures[J].China Civil Engineering Journal,2008,41(9):60―67.(in Chinese)
[14]钱稼茹,姜鋆.判别结构扭转不规则的位移比计算方法探讨[J].建筑结构,2006,36(12):80―82.Qian Jiaru,Jiang Jun.Study on calculating methods of displacement ratio used to judge structural torsion irregularity[J].Building Structure,2006,36(12):80―82.(in Chinese)
[15]郭子雄,吕西林,王亚勇.建筑结构在罕遇地震下弹塑性变形验算的讨论[J].工程抗震,1999(1):13―19.Guo Zixiong,LüXilin,Wang Yayong.Discussion about calculation for elastic-plasti deformation under rare earthquake action[J].Earthquake Resistant,1999(1):13―19.(in Chinese)
[16]沈蒲生,龚胡广.双线性单自由度体系(SDOF)弹塑性位移比的研究[J].工程抗震与加固改造,2006,28(2):1―5.Shen Pusheng,Gong Huguang.Study of the inelastic displacement ratios for SDOF systems[J].Earthquake Resistant Engineering and Retrofitting,2006,28(2):1―5.(in Chinese)