侵蚀环境下多维修方式加固混凝土梁桥受力性能研究  

STUDY ON MECHANICAL PROPERTIES OF BEAM BRIDGE REINFORCED WITH MULTIPLE REINFORCEMENT METHODS UNDER CORROSIVE ENVIRONMENT

作　　者：王知乐[1] 袁学锋[1] 姜荣斌[1] WANG Zhile;YUAN Xuefeng;JIANG Rongbin(School of Construction Engineering,Taizhou Polytechnical College,Taizhou 225300,China)

机构地区：[1]泰州职业技术学院建筑工程学院,江苏泰州225300

出　　处：《工业建筑》2020年第11期174-177,183,共5页Industrial Construction

基　　金：江苏高校“青蓝工程”项目资助(苏教师2019[3]);泰州职业技术学院重点科研项目(TZYKYZD-19-1)。

摘　　要：为了对比不同加固方法对侵蚀环境下病害桥梁构件性能的改善作用,开展了粘贴碳纤维复材(CFRP)片材、粘贴玄武岩纤维复材(BFRP)片材、锚贴钢板法和增大截面法等四种加固方法对锈蚀的钢筋混凝土梁桥构件加固后的受力性能分析研究。通过试验和理论分析对比了上述四种加固方法下锈蚀梁的承载力、刚度和安全储备等性能。结果分析表明:上述四种加固方法均能较大地提高锈蚀梁的极限承载力,但不同加固方法下锈蚀梁的屈服和破坏形式有较大区别。另外,锚贴钢板法对刚度提高最大,且破坏前安全储备最大;粘贴CFRP对刚度提高次之,但其破坏前安全储备最小;粘贴BFRP和增大截面法对锈蚀梁刚度的提高相当且小于粘贴CFRP加固法,但其破坏前的安全储备优于粘贴CFRP加固法。In order to compare the effects of different reinforcement methods on the performance improvement of the damaged bridge members in corrosive environment,four reinforcement methods,such as pasting CFRP sheet,pasting BFRP sheet,anchoring and pasting steel plate and increasing section method,were carried out to analyze the mechanical properties of the corroded reinforced concrete beam bridge members after reinforcement.The bearing capacity,stiffness and safety reserve of the corroded beams under the above four strengthening methods were compared through the test results and theoretical analysis.The results showed that the above four strengthening methods could greatly improve the ultimate bearing capacity of corroded beams,but the yield and failure modes of corroded beams were quite different under different strengthening methods.In addition,the method of anchoring and pasting steel plate had the largest increase in stiffness and the largest safety reserve before damage;the method of pasting CFRP had the second increase in stiffness,but the minimum safety reserve before damage;the method of pasting BFRP and increasing section had the same increase in stiffness of corroded beam and was smaller than that of pasting CFRP,but the safety reserve before damage was better than that of pasting CFRP.

关 键 词：侵蚀环境 锈蚀梁 加固 承载力 刚度 

分 类 号：U441[建筑科学—桥梁与隧道工程] U445.72[交通运输工程—道路与铁道工程]