预制钢板组合梁静载力学试验研究
Study on Static Mechanics Test of Prefabricated Steel Plate Composite Beam
杨世捷 1贺耀北2
作者信息
- 1. 湖南省交通运输厅,湖南长沙 410029
- 2. 湖南省交通勘察规划设计院有限公司,湖南长沙 410200
- 折叠
摘要
为了解预制钢板组合梁结构的基本受力性能,以长益高速扩容工程30 m跨的预制钢板组合梁为工程背景,开展多级静载力学试验,通过实测数据和理论计算值的对比分析,评价结构在标准设计荷载作用的承载能力.结果表明:在设计荷载作用下的跨中挠度实测值为16.15 mm,应变实测值为190 × 10-6,实测值均小于理论值,结构实际工作状况比理论状况要好;π形组合梁的各测点挠度和应变的校验系数均小于2.0,相对残余变形均小于0.2,在设计荷载作用下结构处于弹性工作状态,结构具有良好的强度与刚度,满足设计要求,可作为桥梁上部主体结构使用.结论可为同类型桥梁的推广使用提供参考.
Abstract
To understand the basic mechanical properties of prefabricated steel plate composite beams,a multi-level static load test was conducted based on a 30 m span prefabricated steel plate composite beam from the Changyi Expressway expansion project.The test involved comparing actual measurements with theoretical calculations to evaluate the structure's load-bearing capacity under standard design loads.The results showed that the mid-span deflection under design load was 16.15 mm,and the measured strain was 190 x 10-6,both of which were lower than their theoretical values,indicating the actual working condition of the structure was better than expected.The verification coefficients for deflection and strain at various points of the π-shaped composite beam were all less than 2.0,with relative residual deformation less than 0.2,meaning the structure remained in an elastic state under design loads.It demonstrated good strength and stiffness,meeting design requirements and making it suitable for use as the main structure of bridge superstructures.These conclusions can provide a reference for the widespread application of similar types of bridges.
关键词
预制组合梁/静载试验/承载能力/弹性工作状态Key words
prefabricated steel plate composite beam/static load test/bearing capacity/elastic state引用本文复制引用
基金项目
湖南省交通科技项目(202245)
长沙市望城科技计划项目(KJ231020)
出版年
2024
NETL
NSTL
万方数据