CAJ | 학술논문

文章结合甘肃省西长凤高速公路泾河特大桥工程实例,利用有限元模型,定性分析了混凝土徐变、预应力损失、结构裂缝等因素对连续刚构桥跨中下挠的影响程度。结果表明,加载龄期对混凝土的收缩徐变效应影响显著;徐变模型的选择对桥跨结构下挠变形具有一定的影响;预应力损失对桥跨结构下挠变形有着重要的影响;结构裂缝对桥跨结构下挠变形影响显著,且二者呈现非线性增长趋势。
문장결합감숙성서장봉고속공로경하특대교공정실례,이용유한원모형,정성분석료혼응토서변、예응력손실、결구렬봉등인소대련속강구교과중하뇨적영향정도。결과표명,가재령기대혼응토적수축서변효응영향현저;서변모형적선택대교과결구하뇨변형구유일정적영향;예응력손실대교과결구하뇨변형유착중요적영향;결구렬봉대교과결구하뇨변형영향현저,차이자정현비선성증장추세。
Using Jinghe Bridge Construction,taken place at Xichangfeng Highway in Gansu Province,as an example,the article uses finite element model to analyze the impacts of concrete creeping,prestress force loss,and having structural fractures on the midspan lag of the bridge.The results indicate that loading-age has significant influence on the shrinkage and creep effect of concrete mixture;The prestress force loss and creep model choosing all have significant impact on the down-warping of bridge structure.Moreover,structure fracture affects the creeping effect and they appear to be non-linearly linked.