型钢-混凝土组合加固技术在空心板桥中的应用

发布时间：2018-03-03 12:13

本文选题：装配式梁桥　切入点：空心板桥　出处：《桥梁建设》2017年01期 　论文类型：期刊论文

【摘要】：装配式空心板桥由于铰缝损伤而出现"单板受力"问题,为增强梁板间的横向连接,提出型钢-混凝土组合加固技术,以寿昌江二号桥(装配式预应力钢筋混凝土简支空心板桥)为背景,简述该技术在该桥中的应用。型钢-混凝土组合加固是在沿梁底铰缝两侧设置剪力键,纵向锚贴U形钢板,并在U形钢板和铰缝间灌注高强自密实灌浆料。为检验加固效果,对该桥第2跨进行加固前、后的静载试验。结果表明:加固后该桥跨中应变平均降低20%,挠度平均降低25%以上,桥梁的刚度有所提升;加固后1号板的横向分布系数增大,1号与2号梁板间的铰缝损伤得到修复。实践证明,型钢-混凝土组合加固技术可增强主梁间的横向联系,能有效解决"单板受力"问题。
[Abstract]:In order to strengthen the transverse connection between beams and slabs, the composite reinforcement technology of steel and concrete is put forward in order to strengthen the transverse connection between beams and plates. Taking Shouchang River No.2 Bridge (prestressing simply supported hollow slab bridge) as the background, the application of this technology in this bridge is briefly described. SRC composite reinforcement is to install shear keys along the sides of the bottom hinge joint of the beam, and the longitudinal anchor is attached to the U-shaped steel plate. In order to test the reinforcement effect, the static load test of the second span of the bridge before and after the reinforcement is carried out. The results show that the strain in the middle of the bridge is reduced by 20%, and the deflection is reduced more than 25% after the reinforcement. The stiffness of the bridge has been improved, the transverse distribution coefficient of the No. 1 slab has been increased, and the joint damage between beam No. 1 and beam No. 2 has been repaired. It has been proved by practice that the combined reinforcement technology of steel and concrete can enhance the transverse connection between the main beams. Can effectively solve the "veneer force" problem.
【作者单位】：长安大学公路学院;台州学院建筑工程学院;浙江省公路管理局;
【基金】：浙江省自然科学基金项目(LY15E080003) 浙江省交通厅科技项目(2013H29-1) 浙江省教育厅课题(01017738)~~
【分类号】：U445.72

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