剪力墙板开裂后混凝土受拉性能的试验研究

Experimental Study of Tensile Capacity of Concrete in RC Shear Wall after Cracking

本文通过8片剪力墙板的试验,用计算机对各级荷载下钢筋连续应变值的分析,找出了钢筋混凝土剪力墙板开裂后裂缝间混凝土受拉性能的变化规律。给出了钢筋应变不均匀系数ψ的计算公式。利用该公式可对材料的计算应力-应变曲线进行修正,使得用有限元法计算钢筋混凝土剪力墙及其它以弯曲变形为主的墙板结构时能得出更加准确的结果。

Through the test of 8 RC shear wall specimens and the computer analysis of the strains of steel bars with keyways in the spccimens, the authors have studied the remains of tensile stress of concrete between cracks after cracking and put forward a formula to calculate coefficient ψ, the ununiform distribution factor of steel strain. This coefficient can be used to modify the calculated steel strain in cracked zone, so as to make the results of using finite element method to analyze shear walls more accurate.