钢纤维混凝土管片抗剪承载力设计方法研究  

Study on shear bearing capacity design of SFRC shield segments

作　　者：王帅帅[1] 高波[1] 周佳媚[1] 闻毓民[1] 赵怀宇[2] 

机构地区：[1]西南交通大学交通隧道工程教育部重点实验室,四川成都610031 [2]河北省电力勘测设计研究院,河北石家庄050031

出　　处：《混凝土》2014年第3期135-137,共3页Concrete

基　　金：国家自然科学基金资助项目(51078319;51178398)

摘　　要：通过实际算例详细介绍了我国和欧洲规范关于钢纤维混凝土结构构件抗剪承载力的设计方法。计算结果表明:和欧洲规范设计理论不同,应用我国规范设计方法进行管片抗剪承载力设计,主要是考虑混凝土的抗剪承载力,并没有考虑纵向钢筋对斜裂缝的控制作用,在一定条件下,我国结算结果保守;考虑钢纤维影响,当截面内力较小时,按我国规范计算钢纤维混凝土管片斜截面增加的抗剪承载力比欧洲规范计算结果至少40%左右。因此,建议针对应用我国规范进行钢筋钢纤维混凝土管片抗剪承载力设计的相关内容应作相应调整。本研究可为优化我国钢纤维预制盾构管片的抗剪承载力设计提供参考。Introduced the design theory and method for steel fiber reinforced concrete structural members in Chinese codes and Eu- rocode, and the differences between them explained with examples.According to the analysis, the shear bearing capacity design method of segment in our country, mainly for considering the shear bearing capacity of concrete, and does not take into account the longitudinal rein- forcement effect on the control of inclined cracks, then studies have concluded that in some certain conditions, the settlement results of our codes is conservative.While for the increase of the capacity at ultimate state of oblique section, when the axial pressure low, the number got by Chinese specification is almost 40% lower than that of European specification.As a result, some useful conclusions are given out for the design of steel fiber reinforced concrete structural members in Chinese codes.

关 键 词：钢纤维混凝土 抗剪 设计方法 大偏心受压 盾构管片 

分 类 号：TU528.73[建筑科学—建筑技术科学]