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对某钢天桥的混凝土牛腿开裂原因进行了现场考察和理论分析,确定是由于滑动支座受到约束,温度变化引起的内力导致混凝土牛腿开裂。据此设计了加固方案,经过加固后的天桥能正常使用。
The reason of crack on the concrete leg of a steel flyover was investigated and analyzed theoretically. It was determined that the sliding bearing was restrained and the internal force caused by the temperature change caused the cracking of the concrete leg. According to the design of the reinforcement program, after strengthening the bridge can be used normally.