连续刚构桥梁提载加固方法探讨

• 作 者: 陈志强 余健 段永凤
• 机 构: 云南省公路科学技术研究院,昆明理工大学建筑工程学院,
• 出 处: 公路交通科技(应用技术版)
• 发表日期: 2004年期
• 关键词: 连续刚构桥 加固 连续钢构 大件运输 预提载加固 中腹 预提 中腹板 加预应力 抗弯承载力

某些连续刚构桥梁运营期间会不可避免的通过大件车辆,这时就需要对其进行预提载加固。本文以某加固工程为实例,针对该桥检测病害,结合大件运输背景,总结连续刚构跨中下挠严重等问题,提出在桥梁中跨增加中腹板,并在中腹板内施加预应力方法,通过有限元软件进行模拟分析。结果表明,该方法能有效提高桥梁跨中抗弯承载力、减小腹板剪力和跨中顶底板应力,除此之外,对横向弯曲控制效果也比较好,具有良好应用前景。

Some continuous rigid-frame bridges will inevitably pass large-size vehicles during operation, and they need to be pre-loaded and reinforced. In this paper, a reinforcement project as an example, for the detection of disease bridges, combined with the background of large transport, summarize the continuous rigid frame cross-mid-range deflection and other issues, proposed to increase the mid-span bridge in the web and prestress in the web , Through finite element software for simulation analysis. The results show that this method can effectively improve the flexural capacity, reduce the web shear stress and the stress of the mid-span floor. In addition, the lateral bending control is also effective and has good application prospects.