摘要
为了克服传统塑性设计未考虑结构的累积耗能的不足,结合基于能量结构设计方法和塑性设计理论的基本概念,对钢筋混凝土框架结构基于能量的塑性优化设计方法展开研究。由RC框架结构的破坏机构推导得到结构相应的破坏荷载方程,利用能量平衡原理转化成能量约束方程;考虑规范要求和其他约束方程,利用单纯形法对目标函数进行线性规划求得结构构件的最小抗弯需求;根据构件最小抗弯需求对梁柱尺寸和配筋率进行最优化设计。以某二层单跨平面RC框架结构为实例,验证了上述优化方法的合理性和可行性。
In order to overcome the lack of the traditional plastic design that does not take the accumulated energy dissipation into consideration for the structure, combined with the design method based on energy structure and the basic concepts of the plastic design theory, the plastic optimization design method based on energy of RC frame structure is studied. The corresponding failure load equation is derived by the failure mechanisms of RC frame structure, and the energy constraint equation is converted by using energy balance principle. Then, considering National Code and other constraint equations, the minimum bending demand is obtained by using the simplex method of linear programming for objective equation of structures, and the optimal design for beam- column size and reinforcement ratio is conducted according to the minimum bending demand. Finally, the reasonability and feasibility of the optimization method are verified with the example of a two-story single span of RC frame structure.
出处
《建筑科学》
CSCD
北大核心
2016年第11期116-122,共7页
Building Science
基金
国家自然科学基金项目(51378167
51408179)
关键词
基于能量
塑性设计
破坏机构
优化设计
energy-based
plastic design
failure mechanism
optimal design
