CAJ | 학술논문

为分析套箍加固拱肋的基本力学性能及加固效果，进行套箍加固拱肋和整体浇筑拱肋的对比模型试验，对比分析套箍加固试件的裂缝发展规律、破坏模式与特征、承载能力和新老混凝土结合面的工作性能。试验结果表明：套箍加固模型和整体浇筑模型的裂缝分布规律、破坏过程、破坏模式相同，破坏时挠度相差0．5 mm，破坏荷载相差2．7％，说明二者的力学性能基本相同；试验过程中测试的新老混凝土结合面最大剪应力远小于其承载能力，加载过程中跨中截面测试应变在开裂前符合平截面假定，说明新老混凝土能够作为整体共同受力。通过对比模型试验分析，证明套箍技术加固拱肋是可靠有效的加固方法。
위분석투고가고공륵적기본역학성능급가고효과，진행투고가고공륵화정체요축공륵적대비모형시험，대비분석투고가고시건적렬봉발전규률、파배모식여특정、승재능력화신로혼응토결합면적공작성능。시험결과표명：투고가고모형화정체요축모형적렬봉분포규률、파배과정、파배모식상동，파배시뇨도상차0．5 mm，파배하재상차2．7％，설명이자적역학성능기본상동；시험과정중측시적신로혼응토결합면최대전응력원소우기승재능력，가재과정중과중절면측시응변재개렬전부합평절면가정，설명신로혼응토능구작위정체공동수력。통과대비모형시험분석，증명투고기술가고공륵시가고유효적가고방법。
In order to estimate the fundamental mechanical performance and effect of hooping strengthening arch rib,comparative analysis was performed to analyze the crack development regulation,failure process and charac-teristics,bearing capacity and the performance of young-old concrete interface.The test results show that crack distribution regulation,failure process and mode of the two specimens were identical-the deflection difference of failure state was 0.5 mm and the difference of failure load was 2.7%,which means that the structural mechani-cal performance of hooping strengthening arch rib is as same as that of the integrated pouring arch rib.In the loading process,the measuring maximum shear stress of the young-old concrete interface was much smaller than its bearing capacity,and the testing strain of midsection before cracking basically complied with the plane section assumption,which shows that the young-old concrete could work together.Through the analysis of comparative model test,it shows that hooping strengthening technique is reliable and effective for reinforcing arch rib.