桥梁建设
橋樑建設
교량건설
BRIDGE CONSTRUCTION
2009年
6期
31-34
,共4页
斜拉桥%预应力混凝土结构%悬臂灌筑架桥%塔梁临时固结%空间分析%有限元法
斜拉橋%預應力混凝土結構%懸臂灌築架橋%塔樑臨時固結%空間分析%有限元法
사랍교%예응력혼응토결구%현비관축가교%탑량림시고결%공간분석%유한원법
cable-stayed bridge%prestressed concrete structure%bridge erection by cantilever casting%pylon and girder temporary fixity%spatial analysis%finite element method
预应力混凝土斜拉桥跨径不断增大,主梁宽度也不断增加,其空间效应越来越明显,在其主梁的悬臂施工过程中,通常采用的塔梁临时固结方式常常导致主梁0号块附近开裂.应用MIDAS/Civil结构分析软件,对采用临时固结方式的斜拉桥空间结构进行施工仿真分析.结果表明,常用的塔梁临时固结方式的空间效应导致了主梁混凝土的开裂.对临时固结构造的设置提出建议.
預應力混凝土斜拉橋跨徑不斷增大,主樑寬度也不斷增加,其空間效應越來越明顯,在其主樑的懸臂施工過程中,通常採用的塔樑臨時固結方式常常導緻主樑0號塊附近開裂.應用MIDAS/Civil結構分析軟件,對採用臨時固結方式的斜拉橋空間結構進行施工倣真分析.結果錶明,常用的塔樑臨時固結方式的空間效應導緻瞭主樑混凝土的開裂.對臨時固結構造的設置提齣建議.
예응력혼응토사랍교과경불단증대,주량관도야불단증가,기공간효응월래월명현,재기주량적현비시공과정중,통상채용적탑량림시고결방식상상도치주량0호괴부근개렬.응용MIDAS/Civil결구분석연건,대채용림시고결방식적사랍교공간결구진행시공방진분석.결과표명,상용적탑량림시고결방식적공간효응도치료주량혼응토적개렬.대림시고결구조적설치제출건의.
The restless increase of the span length and main girder width of prestressed concrete (PC) cable-stayed bridges exhibits the more and more significant spatial effect of the bridges. In the process of cantilever construction of the main girders of the bridges, the commonly-used method of pylon and girder temporary fixity often results in cracks in the vicinity of Segments No.0 of the girders. The structural analysis software MIDAS/Civil is used herewith to simulate and analyze the construction of the spatial structures of the cable-stayed bridges used with the temporary fixity. The results of the simulation and analysis show that it is the spatial effect of the temporary fixity that causes the cracks in the girders and the corresponding proposal for setting the temporary fixity structures is made.
