铁路空心薄壁桥墩现存预应力测试试验研究  

Experimental Study on Effective Prestress in Railway Hollow Thin-walled Bridge's Piers

作　　者：王春芬[1,2] 高以健[3] 钟文森[2] 

机构地区：[1]西安建筑科技大学土木工程学院,陕西西安710055 [2]兰州交通大学土木工程学院,甘肃兰州730070 [3]兰州铁路局工务处,甘肃兰州730000

出　　处：《铁道建筑》2012年第3期23-26,共4页Railway Engineering

基　　金：国家杰出青年科学基金项目(50725824)

摘　　要：桥梁墩身现存预应力的确定受多种因素影响。本文结合有限元分析,针对不同荷载、槽间距、槽长、开槽深度等影响因素,讨论了测点处工作应力变化趋势,确定了应力完全释放所需的开槽深度、间距等相关试验参数。以比利沟大桥铁路空心薄壁墩为试验对象,进行墩身内壁切槽和动力性能试验,为今后混凝土桥梁使用性能评估、维护及加固提供技术参考。There are many factors that determine the existing prestress ot ,huge piers, tins paper, analyzed the release of stress on the measurement point with the finite element program ANSYS by using the grooving method, which includes these factors such as working stress, distance of two grooves, length and depth of grooves, etc. The related test parameters were obtained by the FEM numerical simulation, which include the grooving depth and distance where the stress is completely released. The working stress and dynamic parameter of the thin-walled hollow concrete piers were tested with Biligou Railway Bridge, and the results show that stress releasing is an effective detecting method and can serve as a reference for the assessment, maintenance and reinforcement of railway bridges.

关 键 词：现存预应力 应力释放 空心薄壁桥墩 切槽法 

分 类 号：U443.22[建筑科学—桥梁与隧道工程]