装配整体式网格剪力墙压弯承载力计算方法  

THE COMPRESSION-BENDING CAPACITY CALCULATION OF MONOLITHIC PRECAST GRID SHEAR WALL

作　　者：李斌 黄炜[2] LI Bin;HUANG Wei(School of Urban Planning and Municipal Engineering,Xi’an Polytechnic University,Xi’an 710600,China;School of Civil Engineering,Xi’an University of Architecture and Technology,Xi’an 710055,China)

机构地区：[1]西安工程大学城市规划与市政工程学院,西安710600 [2]西安建筑科技大学土木工程学院,西安710055

出　　处：《工程力学》2020年第5期178-189,共12页Engineering Mechanics

基　　金：国家自然科学基金项目(51578446);陕西省住房城乡建设科技科研开发计划项目(2015-K143)。

摘　　要：通过6榀装配整体式网格剪力墙试件的低周反复荷载试验,研究了预制墙板竖向钢筋连接方式、竖向接缝形式,布筋方式对墙体抗震性能及压弯承载力的影响,试验结果表明:6榀墙体均发生以竖向边缘构架破坏为主的弯曲型破坏;预制墙板竖向钢筋采用预埋件焊接时,能有效提升墙体的承载力;预制墙板竖向接缝形式对墙体的承载力影响不大;井字形布筋墙体的承载力及延性略大于其他类型布筋墙体。基于平截面假定,充分考虑预制墙板可靠连接钢筋作用,忽略未连接钢筋作用,建立墙体在开裂、屈服、峰值、极限状态弯矩-曲率计算方法,并对影响其各阶段承载力计算公式的因素进行分析。结果表明,所建立的弯矩-曲率计算公式能较为准确地描述装配整体式网格剪力墙各阶段的荷载-变形关系,计算值与试验结果吻合较好。The cyclic loading test of 6 specimens of monolithic precast grid shear wall was conducted, and the influence of vertical reinforcement splicing in a precast panel, of vertical joints connection form, and of reinforcement pattern of a precast panel on seismic performance and bending capacity of walls was studied. The test shows that 6 specimens suffered from bending failure mainly due to the failure of vertical edge frame. The bearing capacity could be effectively improved, when the vertical reinforcement of a precast panel was welded with embedded parts. The vertical joints connection form had little effect on the bearing capacity of specimens. The bearing capacity and ductility of well-shaped reinforced wall were slightly larger than those of other types of reinforced wall. Based on the assumption of plane section, a calculation method for moment-curvature in cracking, yielding, peak, and ultimate state of walls was established, taking fully into account the role of reliable connecting steel bars in a precast panel and ignoring the role of unrelated steel bars, and the main factors influencing the calculation formula of bearing capacity of walls at different states were discussed. It is shown that the proposed moment-curvature calculation method can be used to predict the load-deformation relationship of monolithic precast grid shear walls accurately. The calculated values were in a good agreement with the experimental results.

关 键 词：装配整体式网格剪力墙 低周反复荷载试验 弯曲破坏 压弯承载力 弯矩-曲率 

分 类 号：TU398.2[建筑科学—结构工程]