【摘要】 对于混凝土梁和预应力混杂C/G纤维布分别采用非线性组合单元和层壳单元模拟,采用Owen屈服准则和Hinton压碎准则等描述了混凝土非线性特性,同时实现了混杂C/G纤维布空间预应力效应,编制了加固体系的三维非线性有限元计算程序。结果表明,预应力水平是影响预应力混杂C/G纤维布加固结构力学性能的主要因素,提出的确定预应力混杂C/G纤维布力学性能的理论方法和计算模型正确。研究结论可供工程加固设计参考。更多还原

【Abstract】 Nonlinear combination element and the shell element are respectively utilized to simulate concrete beam and prestressed hybrid fiber.Besides,the characteres of nonlinear concrete are described by the Owen yield criterion and the Hinton crush criterion.Meanwhile,the three-dimensional prestressing effects of this composite materials and nonlinear finite element computer program of reinforcing system have been realized.The results show that the most reasonable prestress degree is one of the major factors to impact its mechanical properties,which have been strengthened by the prestressed hybrid fiber C/G.And theoretical method and calculation model that determines the mechanical performance of prestressed hybrid fiber in this paper are reasonable and reliable.The research conclusions can be used as a reference in practice engineering design or reinforce.更多还原