摘要
针对钢管束混凝土组合剪力墙两侧钢管束底部屈曲的破坏模式,提出了一种在两侧钢管束中内置通长加劲肋的加强方式。通过4片两侧钢管束带加劲肋的钢管束砼组合剪力墙和2片无加劲肋普通钢管束砼组合剪力墙的拟静力加载试验,研究在低周反复水平荷载作用下,两侧钢管束带加劲肋的钢管束砼组合剪力墙的压弯性能,分析讨论剪跨比和轴压比对加劲肋改善墙体抗震性能的影响。研究结果表明,两侧钢管束内置加劲肋可以有效提高端部钢管束的抗屈服能力,使剪力墙底部屈曲位置内移,提高剪力墙的承载力和耗能能力。在剪跨比和轴压比较大的情况下,其加强与改善效果越明显。
According to the failure mode of the bottom buckling of the steel tube bundles on both sides of the steel tube concrete composite shear wall,a strengthening method with long stiffeners built into the steel tube bundles on both sides of steel tube is proposed.Through the pseudo-static loading test of four steel tube bundle-concrete composite shear walls with stiffeners on both sides of the steel tube and two blank shear-walls without stiffeners,the mechanical properties of the steel tube bundle composite shear wall with stiffeners are analyzed under low-cycle repeated horizontal loads.The influence of shear span ratio and axial compression ratio on stiffeners to improve the seismic performance of walls is summarized and analyzed.The research results show that the built-in stiffeners of the steel tube bundles on both sides can effectively improve the yield resistance of the end steel tube bundles,move the bottom buckling position of the shear wall inward and improve the bearing capacity and energy dissipation capacity of the shear wall.When the shear span ratio and axial pressure are relatively large,the strengthening and improvement effects are more obvious.
作者
宋维国
周新刚
赵亚菲
夏小龙
宋国强
SONG Wei-guo;ZHOU Xin-gang;ZHAO Ya-fei;XIA Xiao-long;SONG Guo-qiang(School of Civil Engineering,Yantai University,Yantai 264005,China)
出处
《烟台大学学报（自然科学与工程版）》
CAS
2021年第3期348-354,共7页
Journal of Yantai University(Natural Science and Engineering Edition)
基金
山东省重大科技创新工程项目(2019JZZY020307)
烟台大学研究生科技创新基金资助项目(YDZD2007)。
关键词
组合剪力墙
两侧带加劲肋
剪跨比
轴压比
composite shear wall
stiffeners on both sides
shear span ratio
axial compression ratio
