基于OpenSees摇摆防屈曲支撑钢框架抗震性能分析
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摘要
为研究摇摆防屈曲支撑钢框架抗震性能,采用Open Sees有限元软件,基于防屈曲支撑钢框架(BRBSF)和摇摆防屈曲支撑钢框架(RBRBSF)拟静力试验建立试验框架数值模型,采用多细分基于刚度法的梁柱单元模拟钢梁与钢柱,梁端削弱截面处用零长度截面单元模拟塑性铰出现,并采用缝(Gap)单元与桁架(Truss)单元模拟摇摆柱脚,对比模拟结果与试验结果,验证模型正确性,并进一步分析RBRBSF响应,结果表明:模型能准确预测BRBSF和RBRBSF抗震性能,摇摆柱脚可减轻主体框架损伤风险。
In order to study the performance of the rocking buckling-restrained braced steel frame,a numerical simulation model is established based on the pseudo-static test of buckling-restrained braced steel frame( BRBSF) and rocking buckling-restrained braced steel frame( RBRBSF) using Open Sees,the steel beam and steel column are modeled by thedispbeamcolumn element with multidivisional,the plastic hinge is simulated with a zerolengthsection element at the reduced beam section,and the Gap element and the Truss element are used to simulate the rocking column foot,the correctness of the model are verified by comparing the simulation results and the experimental results,and the responses of the RBRBSF are further analyzed. The research shows that the model can accurately predict the seismic performance of BRBSF and RBRBSF,the rocking column foot can reduce the damage risk of the main frame.
In order to study the performance of the rocking buckling-restrained braced steel frame,a numerical simulation model is established based on the pseudo-static test of buckling-restrained braced steel frame( BRBSF) and rocking buckling-restrained braced steel frame( RBRBSF) using Open Sees,the steel beam and steel column are modeled by thedispbeamcolumn element with multidivisional,the plastic hinge is simulated with a zerolengthsection element at the reduced beam section,and the Gap element and the Truss element are used to simulate the rocking column foot,the correctness of the model are verified by comparing the simulation results and the experimental results,and the responses of the RBRBSF are further analyzed. The research shows that the model can accurately predict the seismic performance of BRBSF and RBRBSF,the rocking column foot can reduce the damage risk of the main frame.
引文
[1] Ash C,Bartoletti S. Seismic rehabilitation of an existing braced frame hospital building by direct replacement with buckling-restrained braces[A]. ATC and SEI Conference on Improving the Seismic Performance of Existing Buildings and Other Structures[C]. 2009:68-74
[2] Shaw A,Bouma K. Seismic retrofit of the marin county hall of justice using steel buckling-restrained braced frames[A]. Structures 2004@Building on the Past,Securing the Future[C]. ASCE,2014:1-11.
[3]黄海涛,高向宇,李自强,等.用附加防屈曲支撑钢筋混凝土框架加固既有钢筋混凝土框架抗震性能试验研究[J].建筑结构学报,2013,34(12):52-61Huang Hai-tao, Gao Xiang-yu, Li Zi-qiang, et al.Experimental study on seismic behavior of reinforced concrete frames strengthened with additional reinforced concrete frames with buckling brace[J]. Journal of Building Structures,2013,34(12):52-61(in Chinese)
[4] Eghbali M,Asadian E,Amiri G G,et al. Seismic performance of steel frames equipped with bucklingrestrained braces(BRBs)using nonlinear static and dynamic analyses[J]. Journal of Vibroengineering,2017,19(2):1131-1146
[5] Tsai K,Hsiao P. Pseudo‐dynamic test of a full‐scale CFT/BRB frame—Part II:Seismic performance of buckling-restrained braces and connections[J].Earthquake Engineering&Structural Dynamics,2010,37(7):1099-1115
[6] Fahnestock L A,Ricles J M,Sause R. Experimental evaluation of a large-scale buckling-restrained braced frame[J]. Journal of Structural Engineering,2015,133(9):1205-1214
[7]吴徽,张国伟,赵健,等.防屈曲支撑加固既有RC框架结构抗震性能研究[J].土木工程学报,2013,46(7):37-46Wu Hui,Zhang Guo-wei,Zhao Jian,et al. Seismic performance of existing RC frame structures reinforced with buckling-restrained braces[J]. China Civil Engineering Journal,2013,46(7):37-46(in Chinese)
[8] Zhang Guo-wei, Chen Peng, Zhao Zi-wei, et al.Experimental study on seismic performance of rocking buckling-restrained brace steel frame with liftable column base[J]. Journal of Constructional Steel Research,2018,143:291-306
[9] Rossi P P. Importance of isotropic hardening in the modeling of buckling restrained braces[J]. Journal of Structural Engineering,2015,141(4):04014124
[2] Shaw A,Bouma K. Seismic retrofit of the marin county hall of justice using steel buckling-restrained braced frames[A]. Structures 2004@Building on the Past,Securing the Future[C]. ASCE,2014:1-11.
[3]黄海涛,高向宇,李自强,等.用附加防屈曲支撑钢筋混凝土框架加固既有钢筋混凝土框架抗震性能试验研究[J].建筑结构学报,2013,34(12):52-61Huang Hai-tao, Gao Xiang-yu, Li Zi-qiang, et al.Experimental study on seismic behavior of reinforced concrete frames strengthened with additional reinforced concrete frames with buckling brace[J]. Journal of Building Structures,2013,34(12):52-61(in Chinese)
[4] Eghbali M,Asadian E,Amiri G G,et al. Seismic performance of steel frames equipped with bucklingrestrained braces(BRBs)using nonlinear static and dynamic analyses[J]. Journal of Vibroengineering,2017,19(2):1131-1146
[5] Tsai K,Hsiao P. Pseudo‐dynamic test of a full‐scale CFT/BRB frame—Part II:Seismic performance of buckling-restrained braces and connections[J].Earthquake Engineering&Structural Dynamics,2010,37(7):1099-1115
[6] Fahnestock L A,Ricles J M,Sause R. Experimental evaluation of a large-scale buckling-restrained braced frame[J]. Journal of Structural Engineering,2015,133(9):1205-1214
[7]吴徽,张国伟,赵健,等.防屈曲支撑加固既有RC框架结构抗震性能研究[J].土木工程学报,2013,46(7):37-46Wu Hui,Zhang Guo-wei,Zhao Jian,et al. Seismic performance of existing RC frame structures reinforced with buckling-restrained braces[J]. China Civil Engineering Journal,2013,46(7):37-46(in Chinese)
[8] Zhang Guo-wei, Chen Peng, Zhao Zi-wei, et al.Experimental study on seismic performance of rocking buckling-restrained brace steel frame with liftable column base[J]. Journal of Constructional Steel Research,2018,143:291-306
[9] Rossi P P. Importance of isotropic hardening in the modeling of buckling restrained braces[J]. Journal of Structural Engineering,2015,141(4):04014124