论文部分内容阅读
为掌握地震作用下结构在破坏过程中由材料至整体结构不同层次的非线性状态,基于单元耦合技术、多层次损伤性能水准、多层次地震损伤模型,提出了RC框架结构多层次地震损伤演化分析方法。根据耦合界面上能量平衡原理建立的单元耦合技术,能够同时准确计算结构整体力学性能和局部破坏细节,可用以结构多层次损伤数值模拟。按照“材料、截面、构件、楼层、结构”不同层次的破坏特征,提出了作为损伤性能评价标准的多层次损伤性能水准,且统一定义为五个水准。基于变形等价原理和广义力-变形曲线,建立了多层次地震损伤模型,其在各层次上具有一致的力学意义。以某原型RC框架结构试验为分析对象,详细阐述了结构多层次地震损伤演化分析方法。
In order to grasp the nonlinear state of the structure from the material to the different levels of the whole structure during the process of the earthquake, based on the unit coupling technology, the multi-level damage performance level and the multi-layer earthquake damage model, the multi-layer earthquake damage evolution analysis of RC frame structure method. According to the unit coupling technology established by the principle of energy balance at the coupling interface, the overall mechanical properties and local damage details of the structure can be accurately calculated at the same time, which can be used to simulate the multi-level damage of structures. According to the damage characteristics of different levels of “material, section, component, floor and structure”, the multi-level damage performance level as the evaluation standard of damage performance is proposed, and the five levels are uniformly defined. Based on the principle of deformation equivalence and generalized force-deformation curve, a multi-level earthquake damage model is established, which has the same mechanical significance at all levels. Taking a prototype RC frame structure test as the analysis object, the multi-layered earthquake damage evolution analysis method of structure is elaborated in detail.