Summaries of big span prestressed beam construction work;

In order to guarantee the construction quality of 500 mm×1 900 mm bonded prestress beam,its construction procedure,installation and demolishment of formwork,corrugated pipe setting,prestressed beam baiting,threading and stretching duct grouting and end envelop and other construction points were illustrated,so as to guarantee both quality and quantity.

In this paper,design of long-span prestressed beam is introduced.

The reinforcement mechanism and effect of Carbon Fiber Reinforced Polymer for prestressed concrete beams is studied through experiments.

Experimental research on nature frequency of prestressed concrete beams;

Including emergency measure,theory calculation,load test,this article introduces the disposal method and disposal result on the quality problem of prestressed concrete beams which were dismantled formwork prior to drawing.

Simulation of prestressed bridge transformed from simple-supported system into continuous system;

Three finite element models were established to analysis the stress of the anchorage zone of the external prestressed bridge,considering the function of angle iron,steel tie plate,external prestressed steel tube,reinforcement network and distributing reinforcement.

At present, prestressed bridge is the throat hub of the city roads, highways, railway lines.