【摘要】 采用组合式钢筋混凝土非线性有限元方法，对集中荷载作用下钢筋混凝土板进行了极限承载力分析．混凝土材料采用弹塑性本构模型；为考虑材料达到极限强度后的性能，用弥散裂缝模式模拟混凝土拉裂后的应变软化及应力释放，用应变空间破坏面近似处理混凝土的压碎型破坏；钢筋采用等效薄膜模拟．经与试验结果对比，两者吻合性较好．更多还原

【Abstract】 Based on the integral 3D nonlinear element method, the reinforced concrete slabs subjected to concentrated load have been analyzed. The material model assumed for concrete is elasto plastic with strain hardening in triaxial compression and elastic brittle in tension. The smeared crack method is used to model the postcracking property and stress release. A failure surface in strain space is used to check crushing of the concrete. The steel bars are treated as membrane elements.The results obtained are in good agreement with experimental results.更多还原