CAJ | 학술논문

桥梁面板是桥梁结构的主要构件,对结构的整体性能和交通运输起着至关重要的作用.然而随着使用年限的增加,混凝土碳化将对钢筋混凝土桥梁面板的耐久性能产生较大的影响.近年来,玻璃纤维增强复合筋材(GFRP Bars)因具有高强、轻质、耐腐蚀等性能而逐渐被工程界认可.非线性有限元分析结果表明,由于压缩薄膜效应的存在使得同样配筋率的GFRP筋混凝土桥梁面板与钢筋混凝土桥梁面板的工作性能相似,证实了GFRP筋代替钢筋的可行性.在分析混凝土的碳化机理和GFRP的材料属性后发现,由于碳化使混凝土的渗透性和孔隙率降低,在碳化发生以后GFRP筋混凝土桥梁面的耐久性能不仅没有下降反而有所提高.
교량면판시교량결구적주요구건,대결구적정체성능화교통운수기착지관중요적작용.연이수착사용년한적증가,혼응토탄화장대강근혼응토교량면판적내구성능산생교대적영향.근년래,파리섬유증강복합근재(GFRP Bars)인구유고강、경질、내부식등성능이축점피공정계인가.비선성유한원분석결과표명,유우압축박막효응적존재사득동양배근솔적GFRP근혼응토교량면판여강근혼응토교량면판적공작성능상사,증실료GFRP근대체강근적가행성.재분석혼응토적탄화궤리화GFRP적재료속성후발현,유우탄화사혼응토적삼투성화공극솔강저,재탄화발생이후GFRP근혼응토교량면적내구성능불부몰유하강반이유소제고.
As crucial structural components in bridge structures, bridge deck slabs played an important role in integral structural behaviours and transportation. However, with the increasing of ages in services, the durability of reinforced concrete bridge deck slabs was influenced significantly by carbonation. Recently, because of high strength, light weight and strong corrosion-resistance, glass fiber polymer reinforcement bars (GFRP bars) were accepted by civil engineers. Due to the existence of compressive membrane action, it was shown that the structural behaviours of GFRP reinforced concrete bridge deck slabs with same reinforcement percentage were similar as those of steel reinforced concrete bridge deck slabs in nonlinear finite element analysis. Based on numerical analysis results, GFRP is available to be used as replacement of steel reinforcement. According the analysis of mechanism of concrete carbonation and material properties of GFRP, it was found that the durability of GFRP reinforced concrete bridge deck slabs was enhanced after the occurrence of carbonation in concrete structures, because carbonation reduced the permeability and porosity of concrete.