体外预应力加固中新建混凝土锚块加固措施研究  

Study of Newly-built Anchor Reinforcement Measure for External Pre-stressing Reinforced Concrete Bridge

作　　者：陈志军[1] 曹鸿猷[1] 高洪波[2] 朱宏平[1] 

机构地区：[1]华中科技大学土木工程与力学学院,湖北武汉430074 [2]中交第二公路勘察设计研究院有限公司,湖北武汉430056

出　　处：《水电能源科学》2013年第5期130-133,116,共5页Water Resources and Power

基　　金：国家自然科学基金资助项目(51078164);国家重点基础研究发展计划基金资助项目(2011CB013800);国家杰出青年基金资助项目(50925828)

摘　　要：针对某桥梁新建锚块在加固时体外索张拉后出现的病害,根据现场检测数据,分析了锚块病害原因,并提出采用粘贴钢板的方法对锚块进行二次加固,采用实体有限元方法研究了加固前后锚块的变形和应力分布,获得了加固钢板的构造形式和最不利应力区域,并对螺栓的布置方式给出了合理建议。According to the occurrence of the anchor block＇s disease when the external tendons were stressed using external re stressing reinforced method to reinforce a concrete bridge and the field test data, the reason of the disease is analyzed. And then the pasting steel plate method is proposed to reinforce the anchor block. The solid finite element mod eling method is used to analyze the anchor＇s deformation and stress distribution before and after reinforcing. Finally, the structural form of the reinforcement steel plate and the most adverse stress region are obtained. The arrangement of the bolts are discussed and some useful suggestions are proposed.

关 键 词：混凝土桥梁 体外预应力 锚块 加固措施 

分 类 号：U448.35[建筑科学—桥梁与隧道工程] TU318.1[交通运输工程—道路与铁道工程]