钢筋混凝土单向支承板在集中荷载下的简化非线性分析  

SIMPLIFIED NONLINEAR ANALYSIS OF REINFORCED CONCRETE PLATE SUPPORTED IN ONE WAY UNDER CONCENTRATED LOAD

作　　者：宋启根[1] 

机构地区：[1]东南大学

出　　处：《土木工程学报》1990年第3期58-69,共12页China Civil Engineering Journal

基　　金：国家自然科学基金

摘　　要：本文利用文献[1]的线弹性近似解,在关于开裂区与释放力矩的合理假定基础上,对集中荷载位于矩形板心及自由边中点的情况,用等刚度迭代法获得了单向支承板的非线性简化解。导出了:(1)计算板心或自由边中点弯矩和应力的简单实用公式;(2)钢筋应力最大点和直至屈服后的应力全过程实用计算公式。文中还提出了考虑混凝土拉伸硬化的简化分析方法。与多块板的试验结果作了比较,验证了本文方法和计算公式的适用性与精度。In this Paper. based on the formulas for linear analysis of one way orthotropic plates given in Ref.6 and on some rational assumption about cracking zone and released moment, a simplified nonlinear analysis of one-way reinforced concrete plate with concentrated(local rectangular)load can be located at the center of the plate or at the middle point of the free edge, is presented by using the initial stiffness iterative method.A simple formula for determining the bending moment and stress at the center or at the middle point of the free edge and a practical formula for computing the maximum stress of the reinforcing bar up to the yield point are derived. A simplified nonlinear analysis taking account of the tension-hardening of concrete is also presented.The analytical results are compared with the test results of numerous plate specimens to verify the accuracy of the method and formulas.

关 键 词：钢筋混凝土 板 单向支承 非线性 

分 类 号：TU375.201[建筑科学—结构工程]