【摘要】 为了解宽跨比很小的提篮拱拱桥的空间稳定性能,采用响应面法,进行了屈曲稳定特征值的随机静力分析.以宽跨比为1/23.8的铜瓦门大桥为分析对象,通过建立响应面方程,研究了结构的材料性能和几何尺寸的不确定性对该桥空间稳定性的影响.结果表明,结构参数变异不影响该桥一阶空间失稳模态,结构的材料性能和几何尺寸的不确定性对该桥的空间分支屈曲稳定有着不同程度的影响.更多还原

【Abstract】 In order to understand the spatial stability behaviors of tilt-basket arch bridge with a considerable small width-to-span ratio,response surface method(RSM) is applied in stochastic static analysis on spatial buckling problem in such a type bridge.Taking Tongwamen Bridge as a case study,which has a width-to-span ratio only of 1/23.8,a response surface equation is established,the uncertainties of structural material properties and geometrical dimensions are taken into account in studying its spatial buckling.Analysis results indicate that the first buckling model in spatial does not been influenced by various uncertainty parameters and the variations and uncertainties of structural properties have different effects on the spatial buckling property.更多还原