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Structural Design Optimization and Construction Technology Research on Rigid-Frame Bridge Wind Resistance Enhancement

By: Jian’an Zheng 1, Fengwu Yu 2, Jun Tang 2, Chuanyang Yang 2
1Guangxi Pinglu Canal Construction Co., Ltd., Nanning, Guangxi, 530023, China
2 CCCC First Highway Engineering Group Co., Ltd., Beijing, 100000, China

Abstract

According to the principle of operability of Rigid-Frame Bridge project, the structural design optimization plan for wind resistance of Rigid-Frame Bridge is proposed, which mainly focuses on the design optimization of bridge superstructure and substructure. Combined with the current mainstream Rigid-Frame Bridge construction technology, the overall construction plan and box girder construction plan are formulated, and the construction optimization plan is put forward to avoid the problem of time lag. With the help of finite element model, the structural design optimization and construction technology of Rigid-Frame Bridge are simulated and analyzed. The maximum lateral displacement of 12.9cm occurs at the maximum cantilever stage of the pier top, and the cross-section stress at the bottom of the pier is 1.762MPa tensile stress, which does not exceed the permissible value. The error between the measured line (stress value) and the theoretical line (stress value) of the girder section from 1# to 9# during the cantilever stage of the construction is within the permissible value of the project, which verifies that the simulation model is reliable and lays a foundation of the subsequent research.