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武汉长江斜拉桥主梁分段施工混凝土接缝性能试验
引用本文:张开敬,赵人达.武汉长江斜拉桥主梁分段施工混凝土接缝性能试验[J].西南交通大学学报,1994,29(4):436-441.
作者姓名:张开敬  赵人达
作者单位:西南交通大学结构工程研究所
摘    要:根据武汉长江公路斜拉桥主梁设计的需要,进行了5片具有分段灌筑接缝的PPC形模型梁的试验。结果表明,接缝处混凝土抗拉强度明显降低,其强度降低系数初步建议取0.5;试验表明,接缝对梁的极限抗弯强度的没有影响。

关 键 词:斜拉桥  分段施工  抗张强度

A Study on the Behavior of the Joints on Cast-in-Place Segmental Box Girder of PC Cable-Stayed Highway Bridge Over the Yangtze River at Wuhan
Zhang Kaijing, Zhao Renda, Ma Zhongguo.A Study on the Behavior of the Joints on Cast-in-Place Segmental Box Girder of PC Cable-Stayed Highway Bridge Over the Yangtze River at Wuhan[J].Journal of Southwest Jiaotong University,1994,29(4):436-441.
Authors:Zhang Kaijing  Zhao Renda  Ma Zhongguo
Abstract:To check the design of PC calble-stayed highway bridge over the Yangtze River at Wuhan, five PC model box girders with joints were tested under static loading. Test results show that the tensile strength of concrete at the joints decreases significantly, but the joints haveno effect on the ultihmate flexural strength of the girders.The tensile strength reduction factor a of 0. 5 is recommended for the design.
Keywords:cable-stayed bridge  box girder  cast-in-place segmental construction  tensile strength  model tests  
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