钢筋混凝土结构纯扭构件承载力计算方法研究  

Calculation Methods on Bearing Capacity of Reinforced Concrete Structures to Pure Torsion

作　　者：周华元 

机构地区：[1]中交第二航务工程勘察设计院有限公司,武汉430071

出　　处：《工程建设与设计》2015年第8期52-55,共4页Construction & Design for Engineering

摘　　要：介绍了钢筋混凝土结构纯扭构件的破坏形式及特征,研究了纯扭构件承载力计算方法,将其与美国规范相关计算方法进行对比,并给出了计算算例,进行了可靠度分析。结果表明,中美规范中纯扭构件抗扭纵筋配筋率随混凝土立方体抗压强度的增大而增大,美国规范大于中国;对于钢筋混凝土结构纯扭构件,美国规范只考虑了钢筋受扭,而我国规范则考虑了钢筋和混凝土受扭这两个部分,美国规范抗扭承载力计算比我国规范安全;经可靠度分析,对于恒荷载加活荷载组合,中国规范计算的纯扭构件可靠度指标大于美国规范,按照恒荷载加风荷载组合两国规范计算的可靠度指标较为接近。This paper introduces the damage in the form of reinforced concrete structures and features pure torsion member, then studied pure twisted component capacity calculation method, which is associated with the American norms calculation methods were compared, and the calculation example, We conducted a reliability analysis. The results show that the Sino-US specification Pure Torsional Torsional longitudinal reinforcement concrete cube compressive strength increases with the increase of the US specification greater than China; reinforced concrete structure for pure torsion member, the United States considered only reinforced by norms twist, while China is considered the norm twisted steel and concrete of these two parts, the United States regulate torsional capacity computing than the safety of our specifications; by reliability analysis, pure torsion member for constant load plus live load combinations, calculation of Chinese norms reliability index is greater than the US norm, according to the dead load plus wind load combinations reliability index calculation two countries closer specification.

关 键 词：钢筋混凝土结构 受扭构件 承载力 可靠度分析 

分 类 号：TU375[建筑科学—结构工程]