The paper discussed proportion between side span and middle span in three spans prestressed continuous box beam bridge.
本文对三跨预应力连续箱梁桥的边跨与中跨比例问题进行了初步的探讨。
The results indicate that the vertical bending moment of girders, especially the girders of middle span, are influenced more obviously by coherence effect than by local site effect.
研究结果表明：相干效应对主梁纵向弯矩影响比较大，尤其是中跨部位；而局部场地效应相对影响较小。
The main causes of bottom flat crack are analyzed, mainly including radial force generated by closure strands stretching in middle span , non-structural elements and construction effects , etc.
分析了导致底板崩裂的主要原因，主要包括跨中合龙束张拉时产生的径向力作用、非预应力钢筋构造因素及施工影响等；
System of horizontal swivel structure, construction scheme, construction method and construction of middle-span closure are expounded in the paper.
对该桥水平转体结构体系、施工方案、施工工艺、跨中合拢施工进行了详细的阐述。
System of horizontal swivel structure, construction scheme, construction method and construction of middle-span closure are expounded in the paper.
对该桥水平转体结构体系、施工方案、施工工艺、跨中合拢施工进行了详细的阐述。
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