某预应力混凝土空心板桥火损后检测与加固  

Detection and reinforcement of a prestressed concrete hollow slab bridge after fire damage

作　　者：皇星星 HUANG Xingxing(Henan Provirwial Communications Planning&Design Institute Co.,Ltd.,Zhengzhou 450052,Henan,China;Herum Provincial Communications Engi Testing Technology Co.,Ltd.,Zhengzhou 450052,Henan.China)

机构地区：[1]河南省交通规划设计研究院股份有限公司,河南郑州450052 [2]河南省交院工程检测科技有限公司,河南郑州450052

出　　处：《工程建设》2021年第4期73-78,共6页Engineering Construction

摘　　要：本文以某运营期16 m跨预应力混凝土空心板桥火烧后检测、承载能力验算及加固为例,针对空心板及桥墩火烧区域进行了外观、回弹强度、碳化深度、取芯抗压强度、钢筋抗拉强度、空心板自振频率检测及动态应变和挠度实时监测,根据检测及监测结果进行建模计算分析后进行加固方案的制订,加固后取得了较好的效果,为类似桥梁病害的检测及加固提供参考。Taking as example the bearing capacity calculation and reinforcement of a prestressed concrete hollow slab bridge with 16 m span after fire detection, aiming at the appearance of hollow slab and bridge pier fire area,the rebound strength, carbonization depth, coring compressive strength, tensile strength of steel, hollow slab natural frequency of vibration detection and real-time monitoring of dynamic strain and deflection are carried out, and the modeling calculation is conducted according to the result of testing and monitoring, then the strengthening scheme is formulated.It is show that good results have been achieved after reinforcement, which can provide references for similar bridge disease detection and reinforcement.

关 键 词：预应力空心板桥 火烧 专项检测 承载能力检算 加固 粘贴碳纤维布 钢抱箍 

分 类 号：TU753[建筑科学—建筑技术科学]