多冗余度单跨框架结构性能研究

Research on Performance of Multi-redundancy Single-span Frame Structure

为解决单跨框架结构冗余度不足、超静定次数少的问题,该文从增加多余约束,形成多道防线方面考虑,提出在框架结构单跨方向增设钢支撑或短墙的方案。以实际工程为例,对不同方案建立模型并进行计算分析。结果表明:单跨方向增设钢支撑或短墙,均可有效提高抗侧刚度;增设钢支撑使得原结构框架结构体系变为钢支撑-框架结构体系,可提高结构的抗侧性能,减小结构的水平侧移,符合抗震设计中多道防线的设计理念。

In order to solve the disadvantages of single-span frame structure,such as less redundancy and less statically indeterminate times,this paper,considering adding redundant constraints and forming multiple lines of defense,proposed to add steel braces or short walls in the single span direction of frame structure.Based on an actual project,different schemes are modeled,calculated and analyzed.The results showed that adding steel braces or short walls in single span direction can effectively improve lateral stiffness,and the steel brace steers the whole structural system with multiple lines of defense to its own advantages,enhancing the lateral performance of the structure while reduce its horizontal displacement,which is in line with the design concept of multiple lines of defense in the seismic design.