箱型连续梁桥复合加固效果动力特性评定
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摘要
箱型桥梁复合加固的效果是工程中比较关注的课题。本文结合典型箱型连续梁桥-连霍高速公路仁存沟高架桥病害情况,采用复合加固手段提高桥梁承载能力。针对该桥复合加固的效果评定,采用了比较加固前后桥梁动力特性的变化方法进行。建立了该桥的数值模型,分别研究了体外预应力、铆粘钢板、增大截面及粘贴碳纤维布和复合加固法等多种加固措施对桥梁动力特性的影响。计算结果表明,铆粘钢板法、增大截面法等加固法明显影响了桥梁振动频率,可采用频率的变化来评估加固效果;体外预应力加固法、外贴碳纤维和复合加固方法对桥梁动力特性的影响比较复杂,可以通过联合动力特性和静力测试分析加固效果。
Effect of composite reinforcement for Box bridges is more concerned in engineering.According to the disaster situation of Rencungou Viaduct continuous box girder bridge in Lianyungang-Horgos Expressway,the method of composite reinforcement is used to improve the bearing capacity of the bridge.And the effect of composite reinforcement was evaluated based on the change of dynamic characteristics.A 3D numerical simulation model is used to analysis the change of dynamic characteristics of the bridge reinforced by external prestressing reinforcement technology,external sticking steel plate method,increasing section method and gluing CFRP method respectively.Calculated results show that methods of external sticking steel plate and increasing section could obviously affect the vibration frequency of bridge of which their reinforcing effects could be evaluated through the change of vibration frequency,but the influence of these methods are complicated of which the actual effects could be determine based on the change of vibration frequency and the static test results.
Effect of composite reinforcement for Box bridges is more concerned in engineering.According to the disaster situation of Rencungou Viaduct continuous box girder bridge in Lianyungang-Horgos Expressway,the method of composite reinforcement is used to improve the bearing capacity of the bridge.And the effect of composite reinforcement was evaluated based on the change of dynamic characteristics.A 3D numerical simulation model is used to analysis the change of dynamic characteristics of the bridge reinforced by external prestressing reinforcement technology,external sticking steel plate method,increasing section method and gluing CFRP method respectively.Calculated results show that methods of external sticking steel plate and increasing section could obviously affect the vibration frequency of bridge of which their reinforcing effects could be evaluated through the change of vibration frequency,but the influence of these methods are complicated of which the actual effects could be determine based on the change of vibration frequency and the static test results.
引文
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[9]熊辉霞.体外预应力混凝土简支梁的动力试验与理论分析[D].武汉:华中科技大学,2009Xiong Hui-xia.Dynamic Test and Theoretic Analysis ofExternally Prestressed Concrete Simple-supported Beams[D].Wuhan:Huazhong University of Science&Technology,2009(in Chinese)
[2]卢亦焱,童光兵,张号军,外包钢与碳纤维布复合加固钢筋混凝土偏压柱试验研究[J].建筑结构学报,2006,27(1):106～112Lu Yi-yan,Tong Guang-bing,Zhang Hao-jun.Experimental Research on RC Eccentric CompressionColumn Strengthened With the Combination of CFRP andAngle Steel[J].Journal of Building Structures,2006,27(1):106～112(in Chinese)
[3]卢亦焱,张华,张号军,黄银燊.外包角钢与碳纤维布复合加固钢筋混凝土柱抗剪性能试验研究[J].土木工程学报,2007,40(10):1～7Lu Yi-yan,Zhang Hua,Zhang Hao-jun,Huang Yin-shen.Experimental Study on the Shear Behavior ofReinforced Concrete Columns Strengthened with BondedSteel Angles Combining with Carbon Fiber ReinforcedPolymer Sheets[J].China Civil Engineering Journal,2007,40(10):1～7(in Chinese)
[4]杨善红,张广山.复合加固法在古旧石拱桥中的应用[J].公路交通技术,2005,4:119～121Yang Shan-hong,Zhang Guang-shan.Application ofComposite Strengthening Method to Ancient Stone ArchBridges[J].Technology of Highway and Transport,2005,4:119～121(in Chinese)
[5]Hamila N,Boissel P,Chatel S.Finite ElementSimulation of Composite Reinforcement Draping Using aThree Node Semi Discrete Triangle[J].Int J Mater,2008,1:867～870
[6]Aimene Y,Hagege B,Sidoroff F,Vidal-Salle E,BoisselP,Dridi S.Hyperelastic Approach for CompositeReinforcement Forming Simulations[J].Int J Mater,2008,1:811～814
[7]项贻强,姚永丁,胡峰强,荆龙江,朱卫国.体外索加固T型刚构桥的静动力性能研究[J].中国公路学报,2004,17(1):39～44Xiang Yi-qiang,Yao Yong-ding,Hu Feng-qiang,et al.Study of Static and Dynamic Behavior of T-shape RigidFrame Bridge Reinforced by Prestressed External Tendon[J].China Journal of Highway and Transport,2004,17(1):39～44(in Chinese)
[8]熊学玉,王寿生.体外预应力梁振动特性的分析与研究[J].地震工程与工程振动,2005,25(2):55～61Xiong Xue-yu,Wang Shou-sheng.Analysis and Researchof Externally Prestressed Concrete Beam VibrationBehavior[J].Earthquake Engineering and EngineeringVibration,2005,25(2):55～61(in Chinese)
[9]熊辉霞.体外预应力混凝土简支梁的动力试验与理论分析[D].武汉:华中科技大学,2009Xiong Hui-xia.Dynamic Test and Theoretic Analysis ofExternally Prestressed Concrete Simple-supported Beams[D].Wuhan:Huazhong University of Science&Technology,2009(in Chinese)
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