为了防止立交匝道中的小半径曲线钢箱梁支座脱空、梁体侧倾事故的发生,结合城市立交实际工程,设计采用一种新型小半径曲线刚构体系桥,提出了一种新的"戴帽法"预制吊装施工方法,并通过运用三维空间计算软件MIDAS/CIVIL建模计算,分析了此体系桥梁的结构受力特点.结果表明,纵向采用一个固结墩就可有效防止支座脱空、梁体侧倾问题的出现,可为同类小半径曲线梁桥的设计提供参考.

This article analyzes the structure dimension's formulate principles and prestressed tendons' arrange mode of Long-span prestressed concrete continuous beam bridge by the designing living example of prestressed concrete continuous beam bridge(80+135+80)m.It provides a reference for the same type of bridge structural design in future.

以湖南某连续梁桥为工程背景,根据有限元理论以及施工过程中对主梁挠度和线形的测量,使用灰色预测系统控制理论进行高程偏差调整和预测,综合确定主梁施工预拱度。

Considering the effects of water pipe cooling,an accurately calculating model for the hydrated heat temperature field of massive volume concrete piers was established in this paper.And using this model and the analytical software ANSYS,a numerical analysis was conducted of the hydrated heat temperature field of the body concrete of a high-pier,rigid-frame bridge. By a comparison of the calculated results and field observation results of the temperatures,the present method of analysis was proved to be of high precision.

该文运用三维有限元分析软件对一超高墩连续刚构桥的大体积混凝土承台实际施工过程的温度场进行了全程仿真计算,考虑了冷却水管的作用,并与现场的实测结果进行了比较,分析了误差产生的原因.

To the calculation question of concrete temperature field with water pipe cooling,the main fi?nite element analysis methods of cooling water pipe at present are compared and analyzed in this paper.An ef?fective deal with to the Multiple Grid Method is made,So we can carry out the temperature field with water pipe cooling more accurately under the premise of not increasing to the calculating times.Based on the treat?ment method,uses the program of ANSYS to analyze the pier concrete temperature field with water pipe cooling of a rigid frame bridge with high piers and long span,the calculate precision is high through the comparing of calculative results and testing results.