本文阐述应用SUPER SAP软件对跨度为72+ 5× 116+ 72 m的广珠铁路西江特大桥部 分预应力混凝土连续梁0# 块空间分析的方法与结果;从中发现: 在0# 支座附近和施加预应力后在 箱梁顶板局部区域的外缘,都有较大的拉应力。这个结果在传统的三维杆系有限元分析中是不可 能得到的。最后,针对这一发现提出相应的工程措施。

The span of the West-Riv er ex t ra-lo ng bridg e o n the Guang-Zhu Railw ay i s 72+ 5 × 116+ 72m, w hich w as built wi th the partial prest ressed concrete continuous beams. By applying the SUPER S AP sofew are, the pa per ex pounds the method and the result of the spatial analy sis fo r the No. O block of these beams. It i s found tha t there w ere much hig her tensio nal stress nea r the No. O suppo rt , and af ter the prestress being applied, a t the outside edg e o f the local regio n on the to p pla te of the box beams. By t raditional 3D fini te element analysis, it i s impossible to obtain these resul ts. Finally , the co rresponding engineering measures are proposed.