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本文采用大型结构分析程序ANSYS,对一座三跨预应力混凝土双箱双室变截面V墩刚构桥的底板产生裂缝的原因进行了空间分析。结果表明 :对一些复杂的、较宽的三向预应力桥梁 ,应注意预应力空间效应及箱梁剪力滞、畸变等因素可能使箱梁底板出现较大的横向拉应力 ,以免结构出现开裂
In this paper, a large-scale structure analysis program ANSYS was used to analyze the causes of cracks in the floor of a three-span prestressed concrete double-deck double-deck V-section rigid-frame bridge with V- The results show that for some complex and wide three-way prestressed bridges, it should be noticed that the prestressing space effect and the shear lag and distortion of the box girder may cause large lateral tensile stress on the bottom of the box girder to prevent the structure from cracking