钢筋混凝土板有限元非线性分析

本文研究钢筋混凝土板分层的有限元非线性分析方法。将钢筋混凝土板离散成三角形单元,沿板厚再将板分为五层(其中包括一层钢筋层),考虑混凝土材料的非线性性能,采用Fortran语言编制了计算程序。对四点支承、跨中承受集中荷载的板进行了全过程计算。计算得出了荷载-挠度曲线,裂缝开展图式等。并将荷载-挠度曲线与试验结果进行比较,两者吻合较好。

Nonlinear Analysis of Reinforced Concrete Slab by Finite Element Method

This paper presents a layered finite element incremental procedure to predict the behavior of reinforced concrete slab in the pre- and post-cracking ranges. The nonlinearity of behavior of concrete, continuously changing character dueto cracking propagation under monotonically increasing loads were taken intoaccount. During the analysis, tension steel reinforcement in both directions werereplaced by an equivalent thin steel layer with the appropriate thickness, concretend steel layers were divided into triangular elements. A computer program was developed that can be used to calculate the completebehavior, from zero load until failure, of a reinforced concrete slab under mono-tonically increasing loads. Two-way square reinforced concrete slab, supported at the four corners andsubjected to a concentrated load in the center, was calculated by means of thisprogram. Computed load-deflection curves show reasonable agreements with testresults.