期刊论文、会议论文

Chen, H.(Chjun@public.cs.hn.cn)

中文

东南大学学报(自然科学版)

1001-0505

2002

32

5

737-740

第七届全国混凝土结构基本理论及工程应用学术会议

东南大学学报(自然科学版)32卷

2002-10-01

南京

中国建筑学会<&wdkj&>中国土木工程学会

10.3321/j.issn:1001-0505.2002.05.013

交通部“九五”重点研究资助项目（ 95 0 4 0 3 31）；

本校为第一且通讯机构

对不同配筋率的冷轧带肋钢筋混凝土简支标准梁(550mm×150mm×150mm)进行了等幅疲劳荷载试验研究,疲劳试验试件60根,试件配筋率分别为0%,0.29%,0.487%,0.934%和1.946%.这批试件的疲劳破坏形式为:折断破坏、弯拉破坏和剪压破坏.针对不同的疲劳破坏形式,分析了产生不同破坏形式的原因,提出了界限配筋率的概念.受弯构件适当配置冷轧带肋钢筋不仅具有良好的抗裂性能和延性,而且其疲劳寿命也有显著的提高.提出了考虑不同配筋率影响的、可供配筋混凝土路面设计参考的疲劳方程.

Experiment of 60 simply supported concrete beams loaded by equal amplitude fatigue loading was studied. These beams were reinforced by cold-rolled deformed steel bar and were with different reinforcement ratio of 0%, 0.29%, 0.487%, 0.934% and 1.946%. The fatigue failure types of the beams were fracture failure, bending-tensile failure and shear-compression failure. Aimed at the different fatigue failure types of the beams, the failure causes are analyzed. A concept of critical reinforcement ratio is of fered. The concrete beams reinforced by adequate cold-rolled deformed steel bar have well re...