摘要
为研究高耦连比对含型钢边缘构件混合连肢墙结构滞回性能的影响,进行了一个耦连比为45%的5层含型钢边缘构件混合连肢墙结构1/3缩尺模型拟静力试验。基于试验结果,从结构的承载能力、刚度退化、位移延性、耗能能力及破坏模式等方面评价了结构的抗震性能。研究表明:耦连比为45%的混合连肢墙体系在一定程度上降低了墙肢底部弯矩,钢梁的变形能力较强,各层连梁成为沿墙体全高设置的一种耗能构件,扩大了能量耗散的范围,是一种典型的多重抗震设防体系,满足了抗震设计中对于延性的要求,得到的滞回曲线为稳定的梭形。与耦连比为30%试件的试验结果对比表明,耦连比较高时墙肢裂缝分布较为分散,结构上部出现了微小的反向弯曲现象,钢连梁塑性发展更充分,对结构整体抗震性能的贡献提高。
To study the effect of high coupling ratio （CR） on hysteretic behavior of innovative hybrid coupled wall systems with shape steel boundary elements, a 1/3 scale 5 storey model with CR = 4.5% was tested under cyclic loading. Ba^ed on the test results, the seismic behavior is evaluated in terms of bearing capacity, rigidity degeneration, ductility, energy dissipation, and the failure mode. Test results reveal that the moment at the bottom of the wall was reduced to a large extent, and the steel beam has good deformability. Coupling beams at each layer act as energy dissipating damper set along the full height of the wall, expanding the scope of the energy dissipation. The hysteretic curve appears to be typically stable ＂ shuttle＂ form, and the structure is a multiple seismic system, satisfying the demand of seismic ductility design. Compared with specimen CR-30, the cracks in the concrete wall are distributed relatively scattered and it is found that the slight bending in the opposite direction occurred at the top of the structure. So the plastic deformation of coupling beams is more substantial with higher CR, and the seismic behavior of the system is improved.
出处
《土木工程学报》
EI
CSCD
北大核心
2013年第1期52-60,共9页
China Civil Engineering Journal
基金
国家自然科学基金(50878182)
陕西省自然科学基金(SJ08E209)
关键词
混合连肢墙
型钢边缘构件
钢连梁
耦连比
抗震性能
hybrid coupled wall system
shape steel boundary element
steel coHpling beam
coupling ratio （CR）
seismic behavior
