建筑结构学报2025，Vol.46Issue(5)：98-112,15.DOI:10.14006/j.jzjgxb.2024.G020
交替轴向拉压荷载作用下剪切破坏控制的RC剪力墙抗震性能研究
Seismic performance of shear failure controlled RC shear walls under alternating axial tension and compression
摘要
Abstract
With the increase in building height,the bottom wall piers of reinforced concrete(RC)shear wall structures may experience alternating tensile-shear-bending(hereinafter referred to as tensile shear)and compressive-shear-bending(hereinafter referred to as compressive shear)stress states under strong seismic forces.To clarify the seismic performance of RC shear walls controlled by shear failure under alternating axial tension and compression,quasi-static tests and numerical studies were conducted.In the experiment,five identical large-scale shear wall specimens were subjected to low-cycle cyclic loading.Three specimens underwent alternating tensile-shear and compressive-shear loading under different target axial tensile forces(maximum axial tensile forces),while the remaining two served as control specimens,subjected to tensile-shear and compressive-shear loading,respectively.The test results indicate that different axial force states alter the crack patterns and failure modes of the specimens.As the target axial force increases,the shear capacity of specimens under alternating tension and compression decreases in both tensile-shear and compressive-shear states,with a more significant reduction in the former.Moreover,specimens subjected to alternating tension and compression exhibit wider and more extensive crack distribution in the tensile-shear state but ultimately undergo shear failure in the compressive-shear state.Based on the test results,the shear capacity formulas for RC shear walls in the ACI 318-19 code and JGJ 3-2010 were evaluated,indicating that the tensile-shear capacity calculation in ACI 318-19 may be unsafe.A nonlinear finite element model was used for parametric analysis of the shear capacity of RC shear walls under alternating tension and compression,revealing that this effect negatively impacts compressive-shear capacity while having a relatively minor effect on tensile-shear capacity.Additionally,the internal force distribution of the bottom wall piers in double-leg shear walls was analyzed,showing that when one wall pier is in tension,the shear force and bending moment borne by the compressive wall pier on the opposite side increase significantly,potentially exceeding the amplification factor specified in JGJ 3-2010.关键词
RC剪力墙/双肢剪力墙/交替轴向拉压荷载/拟静力试验/有限元分析/受剪承载力Key words
RC shear wall/coupled shear walls/alternating axial tensile and compressive loads/quasi-static test/finite element analysis/shear bearing capacity分类
土木建筑引用本文复制引用
陈晖,黄勇谋,丁雅博,孙敬明,易伟建,周云..交替轴向拉压荷载作用下剪切破坏控制的RC剪力墙抗震性能研究[J].建筑结构学报,2025,46(5):98-112,15.基金项目
国家自然科学基金项目(52008161),中国博士后科学基金项目(2021T140196). （52008161）
