Designand Mechanical Properties Ofa Novelsmall Radius Curve Bridge

Due to the steep terrain and complex road curves,they are often connected by small radius curved bridges,especially highway ramps.The small radius curve bridge is mainly based on the cast-in-place box beam,but due to the limitation of the terrain and high pier construction,the construction conditions of the cast-in-place box girder cannot be satisfied.In the curved bridge,the T-beam often forms a continuous beam in the form of a straight-generation curve,which can only satisfy the curve bridge with a larger radius.In small-radius curve bridges,T-beams are not suitable for small-radius curve bridges due to problems such as internal and external arc differences and interference of flanges in the erection process.In order to better solve the problem of small radius curved bridge in high pier construction,a new type of combined I beam structure is introduced.In view of the design,construction method and mechanical properties of the new bridge,the Yunyang County East Interchange is the engineering background.This paper has studied from the following aspects:1)For the new type I beam,the working principle and design points are given in detail.The construction method is studied,and the temporary construction measures are given.The mechanical performance of the corrugated steel folding plate during the construction process is carried out.The relevant load static test.2)For the new combined I-beam structure,the lateral distribution of the structure is studied by using three-dimensional finite element software and beam-grid method,and coMPared with the conventional T-beam bridge,the overall spatial force performance is obtained.3)For the characteristics of discontinuous I-beam bridge and continuous bridge deck,the continuous mechanical properties of the new bridge deck are studied by using three-dimensional solid finite element analysis technology,and coMPared with the conventional bridge deck continuous T-beam.the study.4)The bridge deck of the combined I-beam is a corrugated steel-raft composite structure.The non-linear ultimate bearing capacity analysis method is used to study the cracking performance and bearing capacity performance of the composite bridge deck.