论文部分内容阅读
武广客运专线武汉火车站的站房采用了上部大跨度复杂钢结构与下部桥梁共同组成的“桥建合一”的新型结构形式,结构动力性能和稳定分析难度大。基于移动荷载列作用下简支梁动力响应计算的基本理论,采用ANSYS软件建立移动荷载列-桥梁的数值计算模型,得到桥梁支座处反力时程曲线及富氏谱,然后以此支座反力作为上部大跨度钢结构的输入荷载,计算上部大跨度钢结构的动力响应,确定结构的薄弱部位,根据结构的组成,分别给出结构各部分的最大等效应力云图及时程曲线。计算结果可为进一步分析结构的疲劳寿命提供基础,提出的研究思路可为国内今后“桥建合一”结构形式的动力响应分析提供参考。
The Wuhan-Guangzhou Passenger Dedicated Railway Station’s station house adopts a new type of “bridge construction and one building” composed of the upper long-span complex steel structure and the lower one, which makes it difficult to analyze the dynamic performance and stability of the structure. Based on the basic theory of dynamic response calculation of simply supported beams under the action of moving load, ANSYS software was used to establish numerical model of moving load-column-bridge to get the reaction time-history curve and Fushun’s spectrum at the bearing of the bridge. Then, The reaction force is taken as the input load of the upper long-span steel structure. The dynamic response of the upper long-span steel structure is calculated and the weak part of the structure is determined. According to the composition of the structure, the maximum equivalent stress cloud and the time history curve of each part of the structure are given respectively. The calculated results can provide the foundation for further analysis of the fatigue life of the structure. The proposed research ideas can provide references for the dynamic response analysis of the future “bridge construction and construction”.