期刊论文

Fang, Z.(fangzhi@hnu.edu.cn)

中文

铁道学报

1001-8360

2012

34

8

87-93

10.3969/j.issn.1001-8360.2012.08.014

国家自然科学基金（51078134）；

本校为其他机构

为使配筋混凝土箱梁长期受力性能的分析趋于简便,将线弹性匀质箱梁短期弯曲性能分析的比拟杆法推广应用于其长期受力性能的分析。引入按龄期调整的有效弹性模量来考虑箱梁混凝土徐变的影响,基于换算截面的原理来考虑箱梁配筋的影响,建立能综合考虑箱梁受力特征和配筋影响的混凝土箱梁长期受力性能分析的比拟杆法。对一根预应力混凝土模型箱梁进行长达1001d的徐变试验,并用其结果对所提方法的适用性进行验证。结果表明:混凝土箱梁长期受力性能的比拟杆法计算结果与试验结果之间吻合较好。与试验值相比,t0~1001d时段内箱梁顶板混凝土压应变的计算值相差7%~11%、跨中截面长期挠曲变形的计算结果相差...

In order to develop a simple method to determine the long-term behavior of the reinforced concrete box girder structure with the shear lag effect of box girder involved, a new bar simulation method was presen- ted in which the Age-adjusted Effective Modulus was used to consider the effects of concrete creep and the prin- ciple of transformed section was used to consider the effects of reinforcement. The results of the method were testified by the long-term performance test of a prestressed concrete simply-supported box girder under sus- tained ...