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对连续刚构桥中跨底板混凝土在竖向预应力筋作用下可能崩裂的现象进行了分析 ,推导了产生这种现象的力学机理 ,提出了避免这种崩裂的建议。对已经出现的这种问题给出了几点处治措施。其分析方法也适用于其他预应力混凝土桥梁
The phenomenon that the floor slabs of continuous rigid frame bridges may crack after vertical prestressing tendons is analyzed. The mechanical mechanism of this phenomenon is deduced, and some suggestions to avoid this kind of cracking are put forward. The problems that have emerged are given a few measures to deal with. The method of analysis is also applicable to other prestressed concrete bridges