钢框架-钢筋混凝土剪力墙结构的地震能量反应分析
|
摘要
以17个钢框架-钢筋混凝土剪力墙混合结构为样本,选取结构自振周期T和结构刚度特征值λ作为分析参数,分析它们在不同类型地震动下的地震能量反应。研究表明,混合结构体系在地震作用下总输入能的大小主要与结构的自振周期以及地震动类型有关,剪力墙与钢框架之间的刚度关系对总输入能影响不大;总输入能等效速度谱的形态受地震动类型的影响很大,同一地震动作用下,幅值与等效速度谱值之间基本能够维持线性增长的关系,但随着结构塑性发展的加剧,这种线性增长关系的离散度会变大;在结构自振周期不变化的前提下,结构的滞回耗能比以及底部剪力墙承担滞回耗能的比例都会随结构刚度比的增大而减小。
Energy response analysis is carried out in 17 steel frame-reinforced concrete shear wall systems with different periods and stiffness ratios under 4 types of ground motions.It is shown that the input energy is sensitive to period T and motion type and the stiffness ratio λ has little influence on the input energy.Under the same ground motion,the input energy equivalent velocity is linearly increased with the peak acceleration of motion,and the linear relationship will be gradually changed with the plastic development of structure.The ratio of hysteretic energy to input energy and the ratio of hysteretic energy dissipated by bottom shear wall to hysteretic energy are decreased with the increase of stiffness ratio λ when the period T of the structure is not changed.
Energy response analysis is carried out in 17 steel frame-reinforced concrete shear wall systems with different periods and stiffness ratios under 4 types of ground motions.It is shown that the input energy is sensitive to period T and motion type and the stiffness ratio λ has little influence on the input energy.Under the same ground motion,the input energy equivalent velocity is linearly increased with the peak acceleration of motion,and the linear relationship will be gradually changed with the plastic development of structure.The ratio of hysteretic energy to input energy and the ratio of hysteretic energy dissipated by bottom shear wall to hysteretic energy are decreased with the increase of stiffness ratio λ when the period T of the structure is not changed.
引文
[1]Bahram MShahrooz,Bingnian Gong,Gokhan Tunc,et al.An overviewof reinforced concrete core wall-steel frame hybrid structures[J].Pro-gress in Structural Engineering and Materials,2001,3(2):149-158.
[2]Chia-Ming Uang,Vitelmo V Bertero.Evaluation of seismic energy in structures[J].Earthquake Engineering&Structural Dynamics,1990,19(1):77-90.
[3]周云,徐彤,周福霖.抗震与减震结构的能量分析方法研究与应用[J].地震工程与工程震动,1999,19(4):133-139.
[4]李国强,周向明,丁翔.高层建筑钢-混凝土混合结构模型模拟地震振动台试验研究[J].建筑结构学报,2001,22(2):2-7.
[5]龚炳年,郝锐坤,赵宁,等.钢-混凝土混合结构模型动力特性的试验研究[J].建筑结构学报,1995,16(3):37-43.
[6]GB 50011-2001,建筑抗震设计规范[S].北京:中国建筑工业出版社,2001.
[7]李国强,周向明,丁翔.钢筋混凝土剪力墙非线性动力分析模型[J].世界地震工程,2000,16(2):13-18.
[8]李国强,周昊圣,周向明.高层钢-混凝土混合结构弹塑性地震位移的工程实用计算[J].建筑结构学报,2003,24(1):40-45.
[9]Sucuoglu Haluk,Nurtug Alphan.Earthquake ground motion characteristics and seismic energy dissipation[J].Earthquake Engineering&Struc-tural Dynamics,1995,24(9):1195-1213.
[10]蒋立志,林荫琦,朱镜清.阻尼耗能在结构弹塑性地震反应中的作用[J].地震工程与工程震动,1996,16(3):30-38.
[2]Chia-Ming Uang,Vitelmo V Bertero.Evaluation of seismic energy in structures[J].Earthquake Engineering&Structural Dynamics,1990,19(1):77-90.
[3]周云,徐彤,周福霖.抗震与减震结构的能量分析方法研究与应用[J].地震工程与工程震动,1999,19(4):133-139.
[4]李国强,周向明,丁翔.高层建筑钢-混凝土混合结构模型模拟地震振动台试验研究[J].建筑结构学报,2001,22(2):2-7.
[5]龚炳年,郝锐坤,赵宁,等.钢-混凝土混合结构模型动力特性的试验研究[J].建筑结构学报,1995,16(3):37-43.
[6]GB 50011-2001,建筑抗震设计规范[S].北京:中国建筑工业出版社,2001.
[7]李国强,周向明,丁翔.钢筋混凝土剪力墙非线性动力分析模型[J].世界地震工程,2000,16(2):13-18.
[8]李国强,周昊圣,周向明.高层钢-混凝土混合结构弹塑性地震位移的工程实用计算[J].建筑结构学报,2003,24(1):40-45.
[9]Sucuoglu Haluk,Nurtug Alphan.Earthquake ground motion characteristics and seismic energy dissipation[J].Earthquake Engineering&Struc-tural Dynamics,1995,24(9):1195-1213.
[10]蒋立志,林荫琦,朱镜清.阻尼耗能在结构弹塑性地震反应中的作用[J].地震工程与工程震动,1996,16(3):30-38.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心