LC40 轻质混凝土桥面铺装在维修加固中的应用

摘要:

针对有一定使用年限的桥梁的常见病害问题,包括跨中挠度较大、桥面开裂、关键位置应力过大等问题,采用性能良好的 LC40轻质高强混凝土能有效的解决桥梁的病害。本文基于西宁湟水河大桥考虑不同铺装结构进行研究。研究结果表明,轻骨料混凝土相较于C40混凝土减少了20％自重,能有效减少结构自重；跨中位移减少了12.5％；跨中纵桥向界面拉应力减少了12.2％。为轻骨料混凝土在桥梁维修加固工程中的应用提供参考。

Abstract:

For the bridge with a certain service life of the common disease problems, including span deflection, bridge deck cracking, excessive stress at key locations, the use of good performance of LC40 lightweight high-strength concrete can effectively solve the bridge disease. This paper is based on the Xining Huangshui River Bridge considering different paving structures for the study. The results of the study show that light aggregate concrete reduces the self-weight by 20% compared to C40 concrete, which can effectively reduce the self-weight of the structure; the mid-span displacement is reduced by 12.5%; and the tensile stress at the longitudinal bridge interface is reduced by 12.2%. This is a reference for the application of light aggregate concrete in bridge repair and strengthening projects.