摘要
为研究混凝土剪力墙的非弹性刚度,根据悬臂剪力墙试件拟静力试验资料,建立了其侧移分析的简化力学模型,推导了考虑弯曲变形和剪切变形的剪力墙抗侧刚度计算公式;基于15组混凝土悬臂剪力墙试件的荷载-侧移试验数据,对影响剪力墙抗侧刚度的主要因素(包括边缘构件配筋率、轴压比以及纵筋的屈服应变等)进行多元非线性回归分析,给出了悬臂剪力墙开裂、屈服和峰值点的侧向刚度计算公式,并与试验结果进行比较.对比发现计算的数据点均在45°斜线两侧,分布比较集中,拟合效果较好.
In order to study the inelastic lateral stiffness of reinforced concrete shear walls,according to the pseudo-static experimental results of cantilever shear walls,the simplified mechanical model of the lateral displacement analysis is established,and the calculation formula of the lateral stiffness considering the flexural and shear deformation is derived for shear walls.Based on 15 groups of load-displacement experimental data of RC cantilever shear walls,by the use of multiple nonlinear regression of the main influencing factors(including the longitudinal reinforcement ratio of the confined boundary element,axial load ratio and the yield strain of the longitudinal reinforcement etc.)on the lateral stiffness,the formula in calculating the lateral stiffness is obtained at such characteristic points as crack point,yield point and peak point,which are compared with the experimental results.It is indicated that:the calculated lateral stiffness with the proposed formula is in agreement with the test results;the calculated data points are uniformly on both sides of the 45°oblique line,the data distribution is concentrated,and the fitting effect is good.
作者
熊二刚
陈恒丰
涂蕊
张倩
梁兴文
XIONG Ergang;CHEN Hengfeng;TU Rui;ZHANG Qian;LIANG Xingwen(School of Civil Engineering,Chang’an University,Xi’an 710061,China;School of Human Settlements and Civil Engineering,Xi’an Euraisa University,Xi’an 710065,China;School of Civil Engineering,Xi’an University of Architecture&Technology,Xi’an 710055,China)
出处
《应用基础与工程科学学报》
EI
CSCD
北大核心
2021年第3期669-679,共11页
Journal of Basic Science and Engineering
基金
国家自然科学基金项目(51108035,51808046)
陕西省重点研发计划项目(2021SF-461)
陕西省自然科学基金项目(2020JQ-917)
西安欧亚学院科研基金项目资助(2018XJZK03)
关键词
侧向刚度
悬臂剪力墙
弯曲变形
剪切变形
多元非线性回归
骨架曲线
lateral stiffness
cantilever shear wall
flexural deformation
shear deformation
multiple nonlinear regression
skeleton curve
