考虑材料应变硬化的结构极限分析的弹性模量缩减法
发布时间：2018-10-23 17:27
【摘要】：基于应变能等效原则求解了考虑材料应变硬化的等效屈服强度,建立了双线性、幂强化和Ramberg-Osgood材料的等效弹塑性模型,定义了基于等效屈服强度的单元承载比,给出了动态识别高承载单元的基准承载比,利用变形能守恒原则确定了高承载单元的弹性模量缩减策略,进而建立了考虑材料应变硬化结构极限分析的弹性模量缩减法,解除了弹性模量调整法受理想弹塑性材料本构关系的限制,可应用于考虑材料应变硬化的结构承载力设计与安全评估中.
[Abstract]:Based on the principle of strain energy equivalence, the equivalent yield strength considering strain hardening of materials is solved. The equivalent elastic-plastic models of bilinear, power hardening and Ramberg-Osgood materials are established, and the unit bearing ratio based on equivalent yield strength is defined. In this paper, the reference load ratio of dynamic identification of high bearing element is given, and the reduction strategy of elastic modulus of high bearing element is determined by using the principle of conservation of deformation energy, and the reduction method of elastic modulus considering the limit analysis of material strain-hardening structure is established. The limitation of the elastic modulus adjustment method to accept the constitutive relation of elastic-plastic materials is lifted and can be applied to the design and safety evaluation of the structural bearing capacity considering the strain hardening of the materials.
【作者单位】： 广西大学土木建筑工程学院;工程防灾与结构安全教育部重点实验室;国家知识产权局专利局专利审查协作河南中心;
【基金】：国家自然科学基金项目(51469004) 广西自然科学基金重大项目(2012GXNSFEA053002)
【分类号】：TB12
本文编号：2289969
[Abstract]:Based on the principle of strain energy equivalence, the equivalent yield strength considering strain hardening of materials is solved. The equivalent elastic-plastic models of bilinear, power hardening and Ramberg-Osgood materials are established, and the unit bearing ratio based on equivalent yield strength is defined. In this paper, the reference load ratio of dynamic identification of high bearing element is given, and the reduction strategy of elastic modulus of high bearing element is determined by using the principle of conservation of deformation energy, and the reduction method of elastic modulus considering the limit analysis of material strain-hardening structure is established. The limitation of the elastic modulus adjustment method to accept the constitutive relation of elastic-plastic materials is lifted and can be applied to the design and safety evaluation of the structural bearing capacity considering the strain hardening of the materials.
【作者单位】： 广西大学土木建筑工程学院;工程防灾与结构安全教育部重点实验室;国家知识产权局专利局专利审查协作河南中心;
【基金】：国家自然科学基金项目(51469004) 广西自然科学基金重大项目(2012GXNSFEA053002)
【分类号】：TB12
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