铁道科学与工程学报2017，Vol.14Issue(11)：2369-2376,8.
装配式预应力混凝土T梁极限承载力试验研究
Experimental study on failure mechanism of prestressed concrete T girder
摘要
Abstract
This paper presents the results of an experimental and analytical study on the failure behavior of a new precast prestressed concrete T girder. The mid-span deflection, girder stiffness and the variation of the cross section strain in the loading process were obtained. The applicability of plane section assumption in the whole stress process of prestressed concrete T girder was verified. A method was proposed to predict the residual bearing capacity of a bridge based on the variation of the position of the cross section strain distribution and the section neutral axis. The mechanical properties, mechanical behavior, elastic and plastic behavior and ultimate bearing capacity of T girder with large span were revealed. The relationships between the load and the deflection, the stress and the neutral axis of the T girder were investigated in this paper, which provides a theoretical basis for predicting the ultimate bearing capacity of the T girder bridge.关键词
装配式预应力混凝土T梁/极限承载力试验/混凝土应变/平截面假定/极限承载力Key words
prestressed concrete T girder/destructive test/concrete strain/plane section assumption/ultimate bearing capacity分类
交通工程引用本文复制引用
王城泉,申永刚,杨润芳,邹昀..装配式预应力混凝土T梁极限承载力试验研究[J].铁道科学与工程学报,2017,14(11):2369-2376,8.基金项目
浙江省自然科学基金资助项目(LY16E080006) （LY16E080006）
国家自然科学基金资助项目(15378240) （15378240）
