摘要
为分析计算具有平面弯曲的矢跨比为1/12的双铰坦拱桥,以相似理论为基础设计了全桥空间受力有机玻璃模型,通过平面杆系有限元模型对实桥的计算,在保证实验效果的前提下,确定了试验的测点和荷载工况.建立空间有限元分析模型,并对模型的理论分析与实测结果进行了对比.将空间计算结果与平面杆系有限元计算模型的计算结果进行比较,并分析平面弯曲对本桥受力的影响,证明了本桥的设计采用平面杆系有限元计算模型是可行的.
In order to analyze and compute a kind of special bridge structure-the two-hinged flat arch bridge with scarce 1/12 rise -to-span ratio, the space Perspex model for the global structure was established based on the similarity theory of the model test. Under the condition of the experiment effects, the actual bridge was computed by FEM plane frame. Also the measuring points and the load cases are defined. A space FEM model was established and the comparison was done between the theoretic analysis and the actual results. The computing result was compared with that of simplified model of FEM plane frame. Through analyzing the effects stressed under plane bending, it is proved that the FEM plane frame model for this model is feasible.
出处
《武汉理工大学学报（交通科学与工程版）》
2009年第3期584-587,共4页
Journal of Wuhan University of Technology（Transportation Science & Engineering）
基金
国家西部交通建设科技项目资助(批准号:200631882350)
关键词
坦拱
矢跨比
模型试验
平面杆系有限元计算
空间分析
flat arch
rise-span ratio
model experiment
plan frame FEM calculate
spatial analysis
