基于钢板-对拉螺杆的空心板桥铰缝加固技术研究

Research on reinforcement technology of hollow slab bridge hinge based on steel plate and opposite screw

为了改善空心板梁桥横向协同受力性能,以某16m跨空心板桥为工程背景,提出了一种基于钢板-对拉螺杆的铰缝加固方法。应用该方法对桥梁横向联系进行加固,并通过加固前后实测横向分布系数与理论值的对比,验证了加固效果。数值对比和分析表明:加固前实测梁板横向分布系数与理论值之比在0.013~1.659之间,大幅偏离理论值1,桥梁横向联系较差;加固后实测梁板横向分布系数与理论值之比在0.950~1.122之间,接近理论值1,表明梁板横向协同受力性能有效提高,加固效果良好。

In order to improve the horizontally coordinated force performance of the hollow slab girder bridge, take a 16 m-span hollow slab bridge as the engineering background, a hinged joint reinforcement method based on steel plate-opposite bolts is proposed. This method is used to strengthen the bridge’s lateral connection, and the reinforcement effect is verified by comparing the measured lateral distribution coefficient before and after the reinforcement with the theoretical value. Numerical comparison and analysis show that the ratio of the measured beam-slab lateral distribution coefficient to the theoretical value before reinforcement is between 0.013 and 1.659, which greatly deviates from the theoretical value 1. The bridge lateral connection is poor;after the reinforcement, the measured beam-slab lateral distribution coefficient is between the theoretical value and the theoretical value. The ratio is between 0.950 and 1.122, which is close to the theoretical value of 1, indicating that the beam-slab lateral cooperative force performance is effectively improved, and the reinforcement effect is good..