摘要
针对当前非杆系钢筋混凝土结构配筋设计过程中“弹性应力图形法”无法对材料非线性特征、裂缝形态和钢筋应力等进行分析的不足,提出三维弹性有限元和二维非线性有限元方法相结合的复合型配筋设计方法。通过对复合型方法中“弹性应力等效原则”和“平面子结构理论”的研究,从理论上论证了复合型设计方法的可行性和合理性,给出了具体的技术路线和计算分析流程,并通过程序开发解决了三维弹性有限元计算结果和二维非线性有限元模型之间过渡环节数据管理和传递的问题。将此方法应用在龙滩导流隧洞进水口结构和苏通大桥桥墩承台结构配筋设计和优化中,对不同配筋情况下结构的裂缝形态、裂缝宽度、裂缝深度和钢筋应力等进行了深入研究,并以此得出了最优的配筋设计方案。
Based on three-dimensional elastic FEM and two-dimensional non-linear FEM, a composite reinforcement design method is proposed for non-member RC structures. This method overcomes the shortcoming of the elastic stress graph method which is inadequate in handling the analysis of non-member RC structures involving material nonlinearity , crack pattern and stress calculations in steel reinforments.. The key methods of elastic tress equivalence and plane substructure are studied, and the feasibility and rationality of the composite method is proven. The specific problems in intermediate data management and data transfer are solved. This composite method is employed in the reinforcement optimization of the Longtan water-diversion tunnel and the Sutong bridge pier. The calculation results include crack form, crack depth, crack width and stress distribution in steel.
出处
《土木工程学报》
EI
CSCD
北大核心
2006年第5期23-28,共6页
China Civil Engineering Journal
