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某简支组合梁桥荷载试验研究
Study on analysis of load tests for a simple supported composite beam bridge
投稿时间:2017-02-23  修订日期:2017-03-25
DOI:
中文关键词:  荷载试验  主梁加固  效率系数  校验系数  承载能力
英文关键词:loading tests  reinforcement of girder  efficiency coefficient  correction coefficient  load-carrying capacity
基金项目:国家自然科学基金项目(51308471)
作者单位E-mail
贾毅 西南交通大学 jiayi0715vip@sina.com 
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中文摘要:
      以某简支组合梁桥为工程背景,基于现场荷载试验方法,对该桥加固后的实际承载力进行了研究。首先,详细介绍了试验过程中应变、挠度测点的布置方式;然后,利用荷载效应等效原则,并结合组合简支梁桥结构的内力分布特点,确定了现场荷载试验中典型截面的最不利荷载工况。最后,将试验结果与理论计算结果进行了对比分析。研究结果表明:静载试验的应变实测值和挠度实测值均小于理论计算值,满足相关规范要求;桥梁结构整体强度、刚度满足设计荷载及正常使用的要求;该桥的跨中横向分布系数分布不均匀,且其横向传递剪力能力较弱。
英文摘要:
      Based on a simple supported composite beam bridge, the actual bearing capacity after reinforcement was studied by field loading test method. Firstly, arrangement of the strain, deflection and modal measuring point were introduced; then, according to load equivalent principle and internal force distribution characteristics , the most unfavorable load layout schemes of typical section of the bridge were determined. Finally, the measured results and theoretical results were compared and analyzed. The results shows that the measured values of strain and deflection are less than the calculated value, and it can meet requirements of specifications. The capacity and stiffness of the bridge meet the requirements of design load and normal use. The transverse distribution coefficient is uneven, and the transverse transfer shear capacity of the bridge is weak.
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