长期超限移动荷载作用下T梁承载能力试验研究  

Experimental Study on T-girder Bearing Capacity Under Long-term Overrun and Moving Load

作　　者：周孙基[1] 张天申[2] 魏建友[1] 

机构地区：[1]北京市房地产科学技术研究所,北京100021 [2]清华大学土木工程系,北京100084

出　　处：《施工技术》2013年第23期30-33,共4页Construction Technology

摘　　要：在北京郊县某损坏简支梁桥工程鉴定的基础上,选取了3根T梁(其中1根已疲劳破坏,另外2根的受荷历史与选取的破坏T梁接近)进行了材料性能及构件的承载能力试验,并对试验结果进行了分析。在材料试验的基础上,对试验T梁的承载力进行数值模拟计算,并与承载力的试验结果进行了对比,提出了类似桥梁(服役一定年限且存在长期超载运营情况)的承载力验算折减系数。On the basis of the appraisal of a damaged simply supported girder bridge, three T-girders （one is a fatigue failure T-girder, and the other two have a similar load history） are selected to carry on the material properties experiments and bearing capacity experiments of the load, and the experiment results are also analyzed. Based on material testing, the bearing capacity of the experiment T-girders is further calculated through numerical simulation, which is compared with the real experiment results, and at last the checking calculation reduction factor of the bearing capacity of the similar bridges（with long- term overload history） is given.

关 键 词：桥梁工程 简支梁桥 超载 T梁 承载力 疲劳试验 

分 类 号：U441[建筑科学—桥梁与隧道工程]