CAJ | 학술논문

钢管混凝土拱桥拱肋混凝土灌注是施工中的控制性工序,为保证灌注过程的安全,在分析、比较弹性稳定计算方法和弹塑性稳定计算方法的特点和差别的基础上,提出了以施工过程中的弹性稳定安全系数为评价标准和用弹塑性稳定分析方法进行校核验算的拱肋混凝土灌注顺序优化方法,并以千岛湖1号特大桥为例进行了分析计算,同时还讨论了钢管拱肋合龙时初始应力对灌注顺序优化结果的影响.分析结果表明,最优的灌注顺序和拱肋合龙时的初应力关系密切,不同的拱肋架设方法将导致最优的灌注顺序发生变化.因此进行拱肋混凝土灌注顺序设计时,应该按照实际拱肋拼装过程考虑钢管拱肋的初应力.
강관혼응토공교공륵혼응토관주시시공중적공제성공서,위보증관주과정적안전,재분석、비교탄성은정계산방법화탄소성은정계산방법적특점화차별적기출상,제출료이시공과정중적탄성은정안전계수위평개표준화용탄소성은정분석방법진행교핵험산적공륵혼응토관주순서우화방법,병이천도호1호특대교위례진행료분석계산,동시환토론료강관공륵합룡시초시응력대관주순서우화결과적영향.분석결과표명,최우적관주순서화공륵합룡시적초응력관계밀절,불동적공륵가설방법장도치최우적관주순서발생변화.인차진행공륵혼응토관주순서설계시,응해안조실제공륵병장과정고필강관공륵적초응력.
Concrete casting in steel tubular ribs is the key step during the construction of CFST arch bridge with long-span. In order to ensure the construction safety,the difference between the elastic stability analysis and elastoplastic stability analysis methods and their characteristics were discussed separately. Then the optimization method of the sequence design of concrete casting in steel tubular ribs was given which taking the elastic stability factor as the criterion and checking by the elastoplastic stability analysis method. In the example of Qiandaohu Bridge,the process of analysis was explained. The influence of the initial stress caused by rib construction on the optimization result of casting sequence was also discussed. The analytical result shows that the optimization result of casting sequence is closely related to the initial stress,different rib constructions can change the optimization result. So the initial stress should be calculated according to the actual construction when designing the sequence of concrete casting.