论文部分内容阅读
新、旧箱梁横向拼接后会发生支座相对沉降差,从而在上部结构中产生附加内力.为分析支座差异沉降对上部结构受力的影响,建立了新、旧箱梁横向拼接后的简化力学计算模型,采用纽玛克数值法分析了支座差异沉降产生的附加内力,同时对影响附加内力的主要因素进行了参数分析.研究结果表明,由纽玛克数值法计算的新、旧箱梁桥基础沉降附加内力可以估算基础差沉降容许值,根据算例分析结果,将基础沉降差容许值控制在10 mm内可以保证新、旧箱梁桥的整体工作性能.
After the new girder and the old girder are spliced horizontally, the relative settlement difference of the bearing will occur, which will result in additional internal forces in the superstructure.In order to analyze the influence of the differential settlement of the bearing on the force of the superstructure, a new spliced Simplified the mechanics calculation model and analyzed the additional internal forces caused by the differential settlement of the abutment by the Newmark numerical method.At the same time, the main parameters influencing the additional internal force were analyzed.The results show that the new and old According to the analysis results of the example, the allowable settlement value of foundation subsidence can be controlled within 10 mm to ensure the overall workability of new and old box girder bridge.