单/多根锚固缓粘结预应力箱梁承载特性研究

Study on Load Bearing Characteristics of Single/Multiple Anchored Slow-bonded Prestressed Box Girder

摘要:

通过制作缓粘结预应力混凝土箱梁试验模型，并对其进行加载试验，得出缓粘结预应力筋在不同位置时对混凝土梁受力性能的影响规律；再进行同步仿真模拟，并将试验数据与模拟数据进行对比，验证模拟数据的正确性；结合FLAC 3D有限差分方法，对比分析单根锚固和多根锚固缓粘结预应力箱梁承载性能。研究成果可为日后桥梁的箱梁设计提供参考。

Abstract:

By making the test model of the slow-bonded prestressed concrete box girder and carrying out the loading test, the influence rule of slow-bonded prestressed tendons on the mechanical properties of concrete beams at different positions is obtained. Synchronous simulation is carried out, and the test data is compared with the simulation data to verify the correctness of the simulation data. Combined with FLAC 3D finite difference method, the load-bearing performances of single-anchored and multi-anchored slow-bonded prestressed box girder are compared and analyzed, which provides the reference for the design of bridge box girder in the future.