上海市简支小箱梁桥面板窄湿接缝研究分析

Research and Analysis on Narrow Wet Joint of Simple-supported Small-box Girder Deck in Shanghai

摘要:

以上海市某越江大桥引桥为工程背景，通过实体模型计算，对比分析了窄湿接缝构造和常规湿接缝构造的受力性能。结果显示，在保证混凝土密实、新旧混凝土结合稳固、钢筋与混凝土无滑移的情况下，窄湿接缝的U形筋铰接构造比一般常规湿接缝构造更可靠，可以保证桥面板的承载力。

Abstract:

Based on the engineering background of the approach bridge of a cross-river bridge in Shanghai, the mechanical properties of narrow wet joint structure and conventional wet joint structure are compared and analyzed through the solid model calculations. The results show that under the condition of ensuring the compactness of the concrete, the stable combination of the new and the old concretes, and the no slip between the steel bar and the concrete, the U-shaped bar hinged structure of the narrow wet joint is more reliable than the general conventional wet joint structure, and the bearing capacity of bridge deck can be ensured.