体育场震后修复再建中混凝土结构消能减震设计研究
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摘要
以往是用高层建筑防屈曲支撑的混凝土减震加固方法,以加固震后体育场混凝土结构的防屈曲支撑力为重点,存在的问题是未考虑结构不同部位节点的防屈曲消能减震支撑性能,加固效果差,需要深入研究混凝土结构建筑加固措施,提高震后体育场修复质量。研究采用基于性能和需求的消能减震设计方法,合理布置混凝土的消能支撑结构,在混凝土结构中底层节点设置防屈曲消能减震支撑,其他节点设置黏滞阻尼器,获取最佳阻尼器设置方案,提高结构减震加固效果。仿真实验说明,EL-Centro(NS)地震波和Newhall地震波情况下,所研究方法设计的消能减震新结构平均顶点侧移值分别比原结构小62 mm和110 mm;在不同震级的情况下,节点间位移角新结构小于原结构,说明该方法设计的体育场修复中混凝土结构减震稳定性强,是一种有效的减震加固方法。
Previous seismic retrofitting methods for high-rise buildings have focused on the strengthening of the buckling-resistant bracing of the concrete structures in the post-earthquake stadium; however, they seldom consider the energy dissipation performance of joints in different parts of the structure, resulting in a poor strengthening effect. It is necessary to study the measures for strengthening the concrete structures to improve the restoration quality of the post-earthquake stadium. In this study, the energy dissipation brace structure of concrete is reasonably arranged using the performance-and demand-based energy dissipation design methods. The buckling-resistant energy dissipation braces are installed at joints on the bottom floor of the concrete structure, and viscous dampers are installed at other joints to improve the seismic absorption and reinforcement effect of the structure. The simulation results denoted that the average top drifts of the new energy dissipation structure designed by this method was 62 and 110 mm smaller than those of the original structure under EL-Centro(NS) and Newhall waves, respectively; under earthquakes of different magnitudes, the displacement angle between the nodes of the new structure was smaller than that in the original structure. The concrete structure designed using the proposed method exhibited strong seismic absorption stability, indicating that the proposed energy-dissipating design method is effective in seismic reduction and structural reinforcement.
Previous seismic retrofitting methods for high-rise buildings have focused on the strengthening of the buckling-resistant bracing of the concrete structures in the post-earthquake stadium; however, they seldom consider the energy dissipation performance of joints in different parts of the structure, resulting in a poor strengthening effect. It is necessary to study the measures for strengthening the concrete structures to improve the restoration quality of the post-earthquake stadium. In this study, the energy dissipation brace structure of concrete is reasonably arranged using the performance-and demand-based energy dissipation design methods. The buckling-resistant energy dissipation braces are installed at joints on the bottom floor of the concrete structure, and viscous dampers are installed at other joints to improve the seismic absorption and reinforcement effect of the structure. The simulation results denoted that the average top drifts of the new energy dissipation structure designed by this method was 62 and 110 mm smaller than those of the original structure under EL-Centro(NS) and Newhall waves, respectively; under earthquakes of different magnitudes, the displacement angle between the nodes of the new structure was smaller than that in the original structure. The concrete structure designed using the proposed method exhibited strong seismic absorption stability, indicating that the proposed energy-dissipating design method is effective in seismic reduction and structural reinforcement.
引文
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[12] 郑晓芬,孙汇涓,汪英俊,等.屈曲约束支撑-不规则混凝土结构体系的弹塑性地震反应分析[J].结构工程师,2016,32(4):139-146.ZHENG Xiaofen,SUN Huijuan,WANG Yingjun,et al.Elasto-Plastic Seismic Response Analysis of an Asymmetric-plan Reinforced Concrete Frame with Buckling-restrained Braces[J].Structural Engineers,2016,32(4):139-146.
[13] ANDERLINI E,FOREHAND D I M,STANSELL P,et al.Control of a Point Absorber Using Reinforcement Learning[J].IEEE Transactions on Sustainable Energy,2016,7(4):1681-1690.
[14] LIN P C,CONG Y H,ZHANG B Y.Fluorinated Liquid Crystalline Surfactants for Dispersion and Alignment of Carbon Nanotubes[J].Journal of Materials Science,2015,50(12):4187-4199.
[15] 赵祥,刘忠华,王社良,等.多维地震作用下大跨空间结构的减震控制分析[J].地震工程学报,2018,40(3):398-405.ZHAO Xiang,LIU Zhonghua,WANG Sheliang,et al.Seismic Control Analysis of Large-span Space Structures under Multidimensional Earthquakes[J].China Earthquake Engineering Journal,2018,40(3):398-405.
[2] 于敬海,陈俭连.某高层建筑采用防屈曲支撑的减震性能研究[J].工程抗震与加固改造,2015,37(2):121-125.YU Jinghai,CHEN Jianlian.Research on Damping Performance of a High-rise Building with BRB[J].Earthquake Resistant Engineering and Retrofitting,2015,37(2):121-125.
[3] 杨峰斌,晋娟茹,陈雪君.混凝土结构加固设计方法优选[J].施工技术,2016,45(21):22-24.YANG Fengbin,JIN Juanru,CHEN Xuejun.Concrete Structure Reinforcement Design Method Preference[J].Construction Technology,2016,45(21):22-24.
[4] 张瑞甫,曹淼,唐和生,等.3·11大地震中大空间结构破坏主因及加固对策[J].结构工程师,2015,31(2):21-27.ZHANG Ruifu,CAO Miao,TANG Hesheng,et al.Study on the Joint Damage and Retrofitting of a Large Span Structure after the Great East Japan Earthquake[J].Structural Engineers,2015,31(2):21-27.
[5] 肖珍珍,王登银,陈建叶,等.碾压混凝土高拱坝坝肩稳定及坝体开裂静动力分析[J].岩土力学,2015,36(12):3541-3547,3575.XIAO Zhenzhen,WANG Dengyin,CHEN Jianye,et al.Static and Dynamic Analyses of Abutment Stability and Dam Cracking of a Roller-compacted Concrete High-arch Dam[J].Rock and Soil Mechanics,2015,36(12):3541-3547,3575.
[6] 冷捷,刘文渊,王卫,等.形状记忆金属自复位钢框架抗震性能分析[J].工程抗震与加固改造,2017,39(2):129-135.LENG Jie,LIU Wenyuan,WANG Wei,et al.Seismic Behavior Analysis of Self-Centering Steel Frame with Shape Memory Alloy[J].Earthquake Resistant Engineering and Retrofitting,2017,39(2):129-135.
[7] 周颖,李宏描,邢丽丽.混合控制消能减震伸臂桁架上海中心抗震性能研究[J].振动与冲击,2016,35(21):188-195,228.ZHOU Ying,LI Hongmiao,XING Lili.Aseismic Performance of Shanghai Center with Hybrid Control Energy Dissipation Outriggers[J].Journal of Vibration and Shock,2016,35(21):188-195,228.
[8] 孙欣,丁建国,朱炜.基于优化模糊控制规则的磁流变阻尼减震结构地震反应分析[J].工程抗震与加固改造,2015,37(1):51-57,63.SUN Xin,DING Jianguo,ZHU Wei.Seismic Response Control of the Structure with Smart Mitigation System Using Magnetorheological Fluid Dampers Based on Optimizing Fuzzy Control Rules[J].Earthquake Resistant Engineering and Retrofitting,2015,37(1):51-57,63.
[9] 杜永峰,祁磊,黄小宁,等.基于变形和能量双参数损伤的消能摇摆架-框架结构抗震性能分析?[J].工业建筑,2016,46(10):59-64,88.DU Yongfeng,QI Lei,HUANG Xiaoning,et al.Aseismic Performance Analysis of Energy-dissipation Light Weight Rocking Frame Structure Based on Deformation and Energy Damage[J].Industrial Construction,2016,46(10):59-64,88.
[10] 夏建中.无粘结钢绞线体外预应力加固钢筋混凝土梁设计计算方法探讨[J].四川建筑科学研究,2017,43(3):46-48.XIA Jianzhong.Discussion on Reinforced Concrete Beams Strengthened by External Prestressing with Non-binding Stranded Steel Wire[J].Sichuan Building Science,2017,43(3):46-48.
[11] 李红,刘胜春.增大截面法加固钢筋混凝土构件的正截面承载力研究[J].北京交通大学学报,2015,39(4):96-100.LI Hong,LIU Shengchun.Research on Cross-section Capacity of Reinforced Concrete Member Strengthened by Increasing-Section Method[J].Journal of Beijing Jiaotong University,2015,39(4):96-100.
[12] 郑晓芬,孙汇涓,汪英俊,等.屈曲约束支撑-不规则混凝土结构体系的弹塑性地震反应分析[J].结构工程师,2016,32(4):139-146.ZHENG Xiaofen,SUN Huijuan,WANG Yingjun,et al.Elasto-Plastic Seismic Response Analysis of an Asymmetric-plan Reinforced Concrete Frame with Buckling-restrained Braces[J].Structural Engineers,2016,32(4):139-146.
[13] ANDERLINI E,FOREHAND D I M,STANSELL P,et al.Control of a Point Absorber Using Reinforcement Learning[J].IEEE Transactions on Sustainable Energy,2016,7(4):1681-1690.
[14] LIN P C,CONG Y H,ZHANG B Y.Fluorinated Liquid Crystalline Surfactants for Dispersion and Alignment of Carbon Nanotubes[J].Journal of Materials Science,2015,50(12):4187-4199.
[15] 赵祥,刘忠华,王社良,等.多维地震作用下大跨空间结构的减震控制分析[J].地震工程学报,2018,40(3):398-405.ZHAO Xiang,LIU Zhonghua,WANG Sheliang,et al.Seismic Control Analysis of Large-span Space Structures under Multidimensional Earthquakes[J].China Earthquake Engineering Journal,2018,40(3):398-405.
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