关于钢筋混凝土桥荷载试验中刚度取值讨论  

Discussions of Stiffness Value in Load Test of Reinforced Concrete Bridge

作　　者：毛海鱼 

机构地区：[1]西安长大公路工程检测中心,陕西西安710064

出　　处：《城市道桥与防洪》2017年第5期112-114,126,共4页Urban Roads Bridges & Flood Control

摘　　要：对钢筋混凝土桥梁荷载试验检测过程中三种截面刚度取值方法全截面抗弯刚度、开裂截面抗弯刚度、开裂构件等效截面抗弯刚度进行了阐述,并分析了各种方法的优缺点。结合单梁静载试验工程实例,对这三种刚度取值方法进行了比较。建议在钢筋混凝土桥荷载试验检测过程中若混凝土尚未开裂采用全截面抗弯刚度,开裂则采用开裂构件等效截面抗弯刚度进行理论计算较为合理。This paper elaborates three section stiffness value methods of full section bending stiffness,cracked section bending stiffness and cracked component equivalent section bending stiffness in load test process of reinforced concrete bridge, and analyzes the advantages and disadvantages of three methods. This paper compares the three stiffness value methods by the single-beam static load test engineering cases. It is proposed to use the full section bending stiffness if the concrete is still not cracked in the load test process of reinforcement concrete bridge, but the use of cracked component equivalent section bending stiffness is more reasonable for the theoretical calculation if cracked.

关 键 词：桥梁荷载试验 全截面抗弯刚度 开裂截面抗弯刚度 开裂构件等效截面抗弯刚度 

分 类 号：U446[建筑科学—桥梁与隧道工程]