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本文结合连续深梁对我筋混凝土非线性有限元分析方法进行讨论。其中对混凝土 开裂的混合模型做了探讨,并分析比较连续深梁支承的各种计算模型;论证了钢筋混 凝土连续深梁引用部分弹性支承的合理性;对单元开裂后的刚度处理做了改进;编制 了钢筋混凝土深梁受力全过程分析程序.对若干根连续深梁做了计算;做了六根承受 集中荷载的两跨连续深梁试验,用边加载边调平的方法保证试验梁为刚性支承.裂缝 分布、开裂荷载、破坏荷载以及P-δ曲线等计算结果基本上反映了深梁主要特性。
This paper discusses the nonlinear finite element analysis method of reinforced concrete with continuous deep beams. The mixed model of concrete cracking was discussed, and various calculation models for continuous deep beam support were analyzed. The rationality of the elastic support for the reference part of reinforced concrete continuous beam was demonstrated, and the stiffness treatment after cracking of the unit was improved. 5. The program for analyzing the full process of reinforced concrete deep beams was compiled. Several continuous deep beams were calculated; six continuous deep beams with two loads subjected to concentrated loads were tested, and the test beams were rigidly supported by the method of leveling by edge loading. The results of crack distribution, cracking load, failure load, and P-δ curve basically reflect the main characteristics of deep beams.