Research On Stress Of 20m Railway Fly-past RPC Prestressed T-beam's End Block

As a new type of compound material, Reactive Powder Concrete(RPC) has many characteristics such as high-strength,high-tenacity,high-durability,good economic function,good environmental protection function and etc. RPC has much more superiority than the normal concrete and the high-strength concrete in its performance. At present ,Research on Reactive Powder Concrete(RPC) in China mostly focus on material performance rather than structural design. Therefore this paper will mainly make the tentative research to the structure design and loading analysis in the case that RPC is used in railway prestressed bridge.In this paper, the RPC, instead of normal concrete, is used in railway prestressed T beam. Both the ANSYS finite element model analysis and the theory analysis verify structure's credibility and design's rationality and feasibility, based on which to emphasize the research to the local stress of the end block.According to the two stages of prestress and load,This paper compares the ANSYS finite element model analysis and the theory analysis by the prestressed lead-length, influence range of local stress, the lateral stress distribution in end block. At the same time, we compare the theory value to the calculated value which comes from finite element analysis procedure, finally get the prestressed lead length and the stress distribution characteristic at end block under the special condition.This paper, as a tentative result, offers the reference for the RPC's application and study in its structural field in the future.