基于静力试验的体外预应力自复位框架地震响应数值模拟
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摘要
一般在进行振动台模型试验时,由于试验引起结构构件损伤,很难在试验前或试验后实测构件或节点的力学参数,但是对于整体弹性模型或部分弹性模型,可以事后对其力学性能进行实测,将实测数据用于修正计算模型,经过修正的计算结果与振动台试验结果有更好对比性。体外预应力自复位框架(EPSCF)是一种新型抗震结构,将预应力筋设置在梁柱构件体外,达到易施工、易监测、可更换的目的。在振动台试验中,EPSCF主体结构保持弹性,耗能装置损坏。振动台试验后,进行EPSCF主体结构低周反复静力试验,实测结构在侧向力作用下的滞回曲线与骨架曲线,并计算出结构每层的抗侧刚度及等效阻尼比。将实测参数代入有限元模型中进行地震响应数值模拟,并与振动台试验结果进行对比。研究结果表明,经过静力试验校准的计算模型能更好地模拟振动台试验结果。
Generally, it is difficult for most models to get the mechanical parameters of components and joints before or after the shaking table test due to the damage during the test, but it is feasible for an elastic or partially elastic model. Measured mechanical parameters can be used to modify the analytical modelling, and get more comparable results with the shaking table test. External Prestressed Self-centering Frame(EPSCF) is a new type of seismic structure with the post-tensioned prestressing tendons installed outside the beams and columns, and this configuration is beneficial to achieve the purpose of easier operation, easier maintenance and easier replacement. The main body of EPSCF kept elastic and the energy-dissipating devices damaged during the shaking table test. Reversed-cyclic static test was carried out on the EPSCF model without damper after shaking table test, the hysteresis curves and skeleton curves of different layers were obtained, lateral stiffness and equivalent damping ratio of each layer were calculated. The measured mechanical parameters are imported to the finite element model to simulate the earthquake responses and calculated results are compared with the shake table test results. This research shows that calculation calibrated by static test can simulate the results of shaking table test more accurately.
Generally, it is difficult for most models to get the mechanical parameters of components and joints before or after the shaking table test due to the damage during the test, but it is feasible for an elastic or partially elastic model. Measured mechanical parameters can be used to modify the analytical modelling, and get more comparable results with the shaking table test. External Prestressed Self-centering Frame(EPSCF) is a new type of seismic structure with the post-tensioned prestressing tendons installed outside the beams and columns, and this configuration is beneficial to achieve the purpose of easier operation, easier maintenance and easier replacement. The main body of EPSCF kept elastic and the energy-dissipating devices damaged during the shaking table test. Reversed-cyclic static test was carried out on the EPSCF model without damper after shaking table test, the hysteresis curves and skeleton curves of different layers were obtained, lateral stiffness and equivalent damping ratio of each layer were calculated. The measured mechanical parameters are imported to the finite element model to simulate the earthquake responses and calculated results are compared with the shake table test results. This research shows that calculation calibrated by static test can simulate the results of shaking table test more accurately.
引文
[1] Priestley M J N, Tao J. Seismic response of precast prestressed concrete frames with partially debonded tendons[J]. PCI Journal, 1993, 38(1): 58-69.
[2] Priestley M J N, Macrae G A. Seismic tests of precast beam-to-column joint subassemblages with unbonded tendons[J]. PCI Journal, 1996, 41(1): 64-81.
[3] 周颖, 吕西林. 摇摆结构及自复位结构研究综述[J]. 建筑结构学报, 2011, 32(9): 1-10.ZHOU Ying, LU Xilin. State-of-the-art on rocking and self-centering structures[J]. Journal of Building Structures, 2011, 32(9): 1-10. (in Chinese)
[4] 吕西林, 崔晔, 刘兢兢. 自复位钢筋混凝土框架结构振动台试验研究[J]. 建筑结构学报, 2014, 35(1): 19-26.LU Xilin, CUI Ye, LIU Jingjing. Shaking table test of a self-centering reinforced concrete frame[J]. Journal of Building Structures, 2014, 35(1): 19-26. (in Chinese)
[5] 鲁亮, 徐颖超, 吕西林, 等. 自复位钢筋混凝土框架地震响应数值模拟[J]. 地震工程与工程振动, 2015, 35(5): 120-124.LU Liang, XU Yingchao, LU Xilin, et al. Numerical simulation on the earthquake response of a self-centering RC frame[J]. Earthquake Engineering and Engineering Dynamics, 2015, 35(5): 120-124. (in Chinese)
[6] LIU Xia, LU Liang, LU Xilin. Research on the seismic performance of an externally prestressed reinforced concrete frame[C]//Proceedings of the 6th International Conference on Advances in Experimental Structural Engineering, UIUC, Urbana, Illinois, USA, 2015.
[7] 鲁亮, 刘霞. 一种体外预应力钢筋混凝土摇摆框架抗震性能研究[J]. 振动与冲击, 2017, 36(9): 179-185+252.LU Liang, LIU Xia. Research on the seismic performance of an external prestressing rocking reinforced concrete frame[J]. Journal of Vibration and Shock, 2017, 36(9): 179-185+252. (in Chinese)
[8] 鲁亮, 刘霞, 徐颖超. 体外预应力自复位框架基于性能的抗震设计方法[J]. 地震工程与工程振动, 2016, 36(5): 35-45.LU Liang, LIU Xia, XU Yingchao. Performance-based seismic design method of external prestressing self-centering frame[J]. Earthquake Engineering and Engineering Dynamics, 2016, 36(5): 35-45. (in Chinese)
[9] 代桂霞, 鲁亮, 徐颖超. 体外预应力自复位结构预应力筋布置方案优化分析[J]. 结构工程师, 2017, 33(2): 26-33.DAI Guixia, LU Liang, XU Yingchao. Location optimization of prestressed tendons for an external prestressed self-centering RC frame[J]. Structural Engineers, 2017, 33(2): 26-33. (in Chinese)
[10] 代桂霞. 体外预应力自复位框架抗震性能振动台试验研究与分析[D]. 上海: 同济大学, 2017.DAI Guixia. Shaking table test and analysis on the seismic performance of an external prestressing self-centering frame[D]. Shanghai: Tongji University, 2017. (in Chinese)
[11] 鲁亮, 刘霞, 陈俊杰, 等. 基于弹塑性静力分析方法的一种摇摆式钢筋混凝土框架抗震性能研究[J]. 地震工程与工程振动, 2015, 35(2): 124-131.LU Liang, LIU Xia, CHEN Junjie, et al. Seismic performance study on a rocking reinforced concrete frame with pushover analysis[J]. Earthquake Engineering and Engineering Dynamics, 2015, 35(2): 124-131. (in Chinese)
[12] JGJ/T 101-2015建筑抗震试验规程[S]. 北京: 中国建筑工业出版社, 2015.JGJ/T 101-2015 Specificating of Testing Methods for Earthquake Resistant Building[S]. Beijing: China Architecture and Building Press, 2015. (in Chinese)
[13] 汪帜辉, 汪梦甫. 钢筋混凝土框架结构阻尼性能的研究[J]. 地震工程与工程振动, 2016, 36(3): 92-101.WANG Zhihui, WANG Mengfu. Research on damping property of reinforced concrete frame structures[J]. Earthquake Engineering and Engineering Dynamics, 2016, 36(3): 92-101. (in Chinese)
[14] 鲁亮, 樊宇, 吕西林, 等. 受控摇摆式钢筋混凝土框架抗震机理研究[J]. 地震工程与工程振动, 2015, 35(1): 66-76.LU Liang, FAN Yu, LU Xilin, et al. Research on the seismic performance of a controllable rocking RC frame[J]. Earthquake Engineering and Engineering Dynamics, 2015, 35(1): 66-76. (in Chinese)
[2] Priestley M J N, Macrae G A. Seismic tests of precast beam-to-column joint subassemblages with unbonded tendons[J]. PCI Journal, 1996, 41(1): 64-81.
[3] 周颖, 吕西林. 摇摆结构及自复位结构研究综述[J]. 建筑结构学报, 2011, 32(9): 1-10.ZHOU Ying, LU Xilin. State-of-the-art on rocking and self-centering structures[J]. Journal of Building Structures, 2011, 32(9): 1-10. (in Chinese)
[4] 吕西林, 崔晔, 刘兢兢. 自复位钢筋混凝土框架结构振动台试验研究[J]. 建筑结构学报, 2014, 35(1): 19-26.LU Xilin, CUI Ye, LIU Jingjing. Shaking table test of a self-centering reinforced concrete frame[J]. Journal of Building Structures, 2014, 35(1): 19-26. (in Chinese)
[5] 鲁亮, 徐颖超, 吕西林, 等. 自复位钢筋混凝土框架地震响应数值模拟[J]. 地震工程与工程振动, 2015, 35(5): 120-124.LU Liang, XU Yingchao, LU Xilin, et al. Numerical simulation on the earthquake response of a self-centering RC frame[J]. Earthquake Engineering and Engineering Dynamics, 2015, 35(5): 120-124. (in Chinese)
[6] LIU Xia, LU Liang, LU Xilin. Research on the seismic performance of an externally prestressed reinforced concrete frame[C]//Proceedings of the 6th International Conference on Advances in Experimental Structural Engineering, UIUC, Urbana, Illinois, USA, 2015.
[7] 鲁亮, 刘霞. 一种体外预应力钢筋混凝土摇摆框架抗震性能研究[J]. 振动与冲击, 2017, 36(9): 179-185+252.LU Liang, LIU Xia. Research on the seismic performance of an external prestressing rocking reinforced concrete frame[J]. Journal of Vibration and Shock, 2017, 36(9): 179-185+252. (in Chinese)
[8] 鲁亮, 刘霞, 徐颖超. 体外预应力自复位框架基于性能的抗震设计方法[J]. 地震工程与工程振动, 2016, 36(5): 35-45.LU Liang, LIU Xia, XU Yingchao. Performance-based seismic design method of external prestressing self-centering frame[J]. Earthquake Engineering and Engineering Dynamics, 2016, 36(5): 35-45. (in Chinese)
[9] 代桂霞, 鲁亮, 徐颖超. 体外预应力自复位结构预应力筋布置方案优化分析[J]. 结构工程师, 2017, 33(2): 26-33.DAI Guixia, LU Liang, XU Yingchao. Location optimization of prestressed tendons for an external prestressed self-centering RC frame[J]. Structural Engineers, 2017, 33(2): 26-33. (in Chinese)
[10] 代桂霞. 体外预应力自复位框架抗震性能振动台试验研究与分析[D]. 上海: 同济大学, 2017.DAI Guixia. Shaking table test and analysis on the seismic performance of an external prestressing self-centering frame[D]. Shanghai: Tongji University, 2017. (in Chinese)
[11] 鲁亮, 刘霞, 陈俊杰, 等. 基于弹塑性静力分析方法的一种摇摆式钢筋混凝土框架抗震性能研究[J]. 地震工程与工程振动, 2015, 35(2): 124-131.LU Liang, LIU Xia, CHEN Junjie, et al. Seismic performance study on a rocking reinforced concrete frame with pushover analysis[J]. Earthquake Engineering and Engineering Dynamics, 2015, 35(2): 124-131. (in Chinese)
[12] JGJ/T 101-2015建筑抗震试验规程[S]. 北京: 中国建筑工业出版社, 2015.JGJ/T 101-2015 Specificating of Testing Methods for Earthquake Resistant Building[S]. Beijing: China Architecture and Building Press, 2015. (in Chinese)
[13] 汪帜辉, 汪梦甫. 钢筋混凝土框架结构阻尼性能的研究[J]. 地震工程与工程振动, 2016, 36(3): 92-101.WANG Zhihui, WANG Mengfu. Research on damping property of reinforced concrete frame structures[J]. Earthquake Engineering and Engineering Dynamics, 2016, 36(3): 92-101. (in Chinese)
[14] 鲁亮, 樊宇, 吕西林, 等. 受控摇摆式钢筋混凝土框架抗震机理研究[J]. 地震工程与工程振动, 2015, 35(1): 66-76.LU Liang, FAN Yu, LU Xilin, et al. Research on the seismic performance of a controllable rocking RC frame[J]. Earthquake Engineering and Engineering Dynamics, 2015, 35(1): 66-76. (in Chinese)