高性能灌浆料维修空心板桥铰缝的足尺试验研究-《郑州大学学报(工学版)》

文章信息/Info

Title:: High performance grouting material hollow hinge joints in hinged slab bridge maintenance technology research

作者:: 闫卫红; 付立军; 赵军; 1.河南省交通科学技术研究院有限公司,河南郑州4500152.公路桥梁安全检测与加固技术交通运输行业研发中心,河南郑州4500153.郑州大学土木与工程学院,河南郑州,450001

Author(s):: Yan Weihong1; Fu Lijun1; Zhao Jun2; 1. Henan Transportation Science and Technology Research Institute Co., Ltd., Zhengzhou, Henan 450015; 2. Highway Bridge Safety Detection and Reinforcement Technology Transportation Industry R&D Center, Zhengzhou, Henan 450015 3. School of Civil and Engineering, Zhengzhou University, Zhengzhou, Henan, 450001

Keywords:: high-performance; grouting material; hollow slab; hinge joints; full-scale experiment

摘要:: 为了研究高性能灌浆料在空心板桥铰缝中的维修加固效果,以实桥拆除的3片30 m跨空心板梁为对象,进行了高性能灌浆料维修空心板桥铰缝的足尺试验研究.通过对铰缝修复后3片空心板组成的装配式空心板桥进行中板跨中集中加载,测量并分析了各板梁的荷载-挠度曲线,给出了试验的破坏模式.试验结果表明,加载初期各板梁挠度变化基本相同,各板梁间整体工作性能良好;极限状态下破坏形态为灌浆料与板梁结合面的纵向脆性开裂破坏;采用高性能灌浆料维修后对应原桥设计荷载的超载储备为1.74.

Abstract:: In order to study the repair and reinforcement effect of high-performance grouting materials in the hinge joints of hollow slab bridges, a full-scale test of high-performance grouting materials for repairing the hinge joints of hollow slab bridges was carried out by taking three 30-meter-span hollow slab girders removed from the real bridge as objects. Research. Through the concentrated loading of the mid-span mid-span of the prefabricated hollow slab bridge composed of three hollow slabs after hinge joint repair, the load-deflection curves of each slab girder were measured and analyzed, and the failure mode of the test was given. Test results It shows that the deflection changes of each plate girder are basically the same at the initial stage of loading, and the overall performance of each plate girder is good; the failure form in the limit state is the longitudinal brittle cracking failure of the joint surface between the grouting material and the plate girder; The overload reserve for the design load is 1.74.