Pot shell swelling during pot start-up;

电解槽启动期间的槽壳上拱

Study on the prestress concrete beam camberunder different creep modes;

不同徐变模式下预应力混凝土梁上拱度的研究

By analyzing measured value of the camberand theoretical value of camberof RPC low-altitude T-beam at the stretching stage,a comparison certifies that the pre-stress s stress is controlled accurately,and the loss of pre-stress is cal- culated correctly,which means the theoretical calculation method of camberis feasible.

对RPC低高度T形梁张拉阶段梁体上拱度试验实测值和理论计算值进行对比分析,两者符合较好,证明了该梁预应力张拉控制得比较准确,预应力损失的计算方法得当,上拱度的理论计算方法是可行的。

Under the action of a prestressing force,the camberdeformation of a PC simply supported girder develops slowly due to concrete creep effect.

如果对于徐变变形的预测不准,在运营阶段梁体徐变变形的发展将会引起桥面的立面线形不平顺,严重影响行车安全和旅客舒适度,甚至将造成梁体上拱度过大而无法使用。

Based on the fact that the creep camberof the high-speed railway bridge should be carefully considered,a new-type twice prestressed composite structure applied to high-speed railway bridge was proposed.

针对高速铁路桥梁对于徐变上拱度有着严格的限值,若徐变上拱过大将严重地影响铁路桥梁的使用性能,甚至危及行车安全等问题,提出将新型二次预应力组合结构应用于高速铁路桥梁。

Excessive creep camberof prestressed concrete bridge would result in risk on the traffic safety in high-speed railway.

高速铁路预应力混凝土桥梁徐变上拱过大会影响桥上列车运行安全,为了控制预应力混凝土桥梁徐变上拱,将2次施加预应力新技术应用于预应力混凝土梁中,以箱梁为例,设计了4根不同预应力度的2次预应力简支组合梁,分析了其各施工受力阶段截面应力、强度和抗裂性,并进行了结构尺寸与配筋完全相同的常规预应力混凝土简支梁和2次预应力简支组合梁徐变上拱的对比计算分析。

In the combination with the project example,the paper introduces the cause and the treatment measures of reinforced concrete basin slab bulge.

结合工程实例,介绍钢筋混凝土水池池底板上拱的原因及处理措施。

Analysis and control on the deflection upwardsof large prestressed concrete aqueduct;

大跨预应力混凝土梁式渡槽结构上拱度的分析与控制

The influence on the deflection upwardsof concrete shrinkage, creep and temperature in prestressed concrete bridges were researched by experimental observation.

结合武汉绕城高速公路的桥梁施工工程 ,选取 30 m预应力混凝土 T梁作为研究对象 ,通过开展对梁内应变的观测和梁上拱度的长期测量观测的试验研究 ,探讨了混凝土收缩、徐变和温度等因素对预应力混凝土梁上拱度的影响以及预应力混凝土梁上拱度随时间的变化规律 ,为预应力混凝土梁桥的设计和施工提供了参考依据 。

Taking the steel tube concrete ribbed arch bridge for example,this article establishes the finite element model of space analysis according to the structural finite element theory and studies the influence of the loading sequence on the deformation and stress of the main arch bridge in the span drel construction so as to choose the loading sequence of safer spandrel construction.

以钢管混凝土肋拱桥为例,根据结构有限元理论建立空间分析的有限元模型,研究了拱上建筑加载顺序对主拱圈变形及受力的影响,从而选择更为安全的拱上建筑施工加载顺序。

A detailed analysis of the combination operation of the spandrel construction, the endogen force generated by vehicle load and the dynamic property of the compound arch bridge is carried out in this ar.

本文对复拱桥拱上建筑联合作用、汽车荷载内力及复拱桥动力特性进行了细致的分析，并应用空间有限元程序进行计算。