型钢混凝土框架结构基于位移的抗震设计方法研究

Research on displacement-based design method of steel reinforced concrete frame structures

根据型钢混凝土(SRC)框架结构的特点,将其性能划分为基本完好、轻微损坏、中等破坏和防止倒塌四个水平,并用层间位移角限值予以量化;将SRC多自由度体系转化为等效单自由度体系,导出了相应的等效参数,并根据其性能水平确定出结构的目标位移。在此基础上,提出SRC框架结构基于位移的设计步骤,并依此对结构进行承载力设计,用静力弹塑性分析方法对所设计的SRC规则框架结构进行推覆分析,校核结构的侧移形状与初始设计侧移曲线是否一致,在不满足变形需求时,用推覆至该性能水平时的侧移曲线作为修正后的侧移曲线重新计算。算例分析表明,文中方法简便实用、结果精确,能够实现SRC框架结构基于位移抗震设计的目的。

The seismic performance of steel reinforced concrete（SRC） frames is divided into four levels which are basically well,slight destruction,secondary destruction and collapse prevention according to their characteristics,and the four levels are quantified with storey drift angle.The SRC multi-degree-of-freedom system is transformed into an equivalent single-degree-of-freedom system and the corresponding parameters are derived,and the target displacement is also determined according to the corresponding perform...