典型弯梁桥支座设置分析

Analysis on setting of typical girder bridge seat

在上个世纪八十年代和九十年代,我国修建了很多弯梁桥,但是由于设计理论和计算软件刚刚起步,主要采用基于假定条件下的杆件结构力学方法进行设计计算,在支撑体系的模拟和优化上存在很大缺陷,导致目前很多既有弯梁桥支座产生偏移、脱空等严重病害。进入本世纪后,随着桥梁设计理论的革新和设计软件的发展,基于空间有限元的理论和三维实体模型的计算方法,使支撑体系的真实模拟和优化得以实现。

In the 1980s and 1990s, many girder bridges were built in China, but due to the fact that at that time the design theory and calculation software were at the preliminary stage and calculations were made according to structural mechanics under certain assumptions, with a lot of deficiencies in simulation and optimization of bracing system, now these bridges' seats have displacement or cavity problems. In the 21st century, innovation of bridge design theory, development of design software and calculation method based on finite element theory and three-dimensional physical model have realized the real-simulation and optimization of bracing system.