Pot shell swelling during pot start-up;

Study on the prestress concrete beam camber under different creep modes;

By analyzing measured value of the camber and theoretical value of camber of 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 camber is feasible.

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

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

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

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

Analysis and control on the deflection upwards of large prestressed concrete aqueduct;

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

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.

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.