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目前,桥梁设计方法中,梁线性分析和主梁分配系数常用于计算梁能承受的最大活荷载。然而,这种方法无法预测活荷载作用下所有梁的荷载响应。此外,与桥梁的三维分析和荷载试验结果相比,该方法偏于保守。使用弹簧近似法,能够精确模拟桥梁的三维活荷载响应,且与有限元分析结果相符。对于给定的车辆位置,能够方便地计算每根梁的抵抗弯矩和个别梁的变形。利用弹簧近似法的结果,能够预测隔板、横梁等次要构件承受活荷载的能力。这种分析方法对桥梁上各种车辆位置都适用,有助于桥梁设计和评估。
Currently, the bridge design method, the beam linear analysis and the main beam distribution coefficient is often used to calculate the beam can withstand the maximum live load. However, this method can not predict the load response of all beams under live load. In addition, the method is conservative compared with the three-dimensional analysis and load test results of bridges. Using the spring approximation method, the three-dimensional live load response of the bridge can be accurately simulated and in accordance with the finite element analysis results. For a given vehicle location, it is easy to calculate the bending moment of each beam and the deformation of individual beams. Using spring approximation, the ability of secondary members, such as bulkheads and beams, to withstand live loads can be predicted. This method of analysis applies to the various vehicle positions on the bridge and helps in the design and evaluation of the bridge.