In theory , it is feasible that using grey system theory to forecast flexibility . on the basis of this theory , taking 270 meters span continuous rigid frame bridge of humen bridge as an example , this paper analyzes the flexibility deformation in th e process of construction 采用灰色系统理论来进行预测,从理论上来说具有一定的可行性,基于这一思想,本文以虎门大桥270米混凝土连续刚构桥施工中的挠度变形为例进行了计算分析。
Because continuous rigid frame bridge is a kind of multi - degree indeterminate structure , large internal force will be produced in the bridge structure due to the temperature effect . therefore , it is necessary to design the flexible pier with small lateral displacement rigidity , which calls for the decision of a reasonable ratio of beam bending rigidity to pier lateral displacement rigidity 此外,连续刚构桥是高次超静定结构,温度变化将引起较大的结构内力,需要设计抗推刚度较小的柔性墩以减小温度内力,合理确定主梁与墩的刚度比值是设计的关键。
Using the time dependent finite element method of age - adjusted effective modulus , the author calculates the deflection which is induced by shrinkage and creep in a continuous rigid frame bridge of urban rail transit , and further compares with the site test result , the conclusion is very meaningful 摘要采用按龄期调整有效模量的时变分析有限元法,对城市轨道交通预应力混凝土连续刚构桥的收缩徐变变形进行了理论计算,并与实测结果进行了对比分析,结果表明理论计算是可信的。
In this paper , i have analyzed the distortion of continuous rigid frame bridge at the condition of temperature uniform change by displacement method and finite element method computer aided design program - sap91 . it included : the distortion and inner force condition at the bottom of single pier when it is consolidated , the distortion and inner force condition of thin double piers - rigid frame bridge ; the distortion and inner force condition of thin double piers - rigid frame bridge when the consolidation is elastic consolidation and confinement adopted different rigidity factor ; and the inner force condition of thin double piers - rigid frame bridge when the distance of piers is different 本文利用位移法和结构有限元电算程序sap91 ,对连续刚构体系桥梁在受到均匀温变情况下:墩底固接单柱墩、双薄壁墩连续刚构桥;墩底弹性固接时的双薄壁墩连续刚构桥采用不同转动约束刚度系数情况;以及双薄壁墩墩间距不同的连续刚构桥梁的受力情况进行了分析和比较。
Through the investigations on the distribution of cracks in thin - walled flexible piers of built continuous rigid frame bridges , and mechanics analysis on a thin - walled flexible pier of a building continuous rigid frame bridge , the cause of the cracks on the piers is derived preliminarily 摘要通过调查已建成的连续刚构桥梁的薄壁柔性墩身裂缝分布状况,和对正在施工中的连续刚构桥梁的薄壁柔性墩身进行受力分析,初步得到连续刚构梁桥的薄壁柔性墩墩身裂缝产生的原因。