【摘要】 针对时速200 km单线铁路32 m孔跨简支T梁的圆端形实体桥墩进行计算分析。在已定桥墩尺寸的前提下,侧重分析了墩身截面偏心系数e/s最大值随墩身高度、桥址处场地类别、地震烈度、桥墩整体刚度以及桥墩在线路平面上所处位置等因素变化的情况;同时还分析了在墩顶截面尺寸相同的条件下,不同的墩身坡率对e/s最大值的影响。最终得出在Ⅰ类场地土情况下,e/s最大值随着墩高的增加先增大后减小,且在墩高9 m左右时,e/s最大值出现极大值。而在Ⅲ类场地土情况下,同一坡率的桥墩其e/s最大值随着墩高的增加而增大;相同墩高时e/s最大值随着地震烈度的增大而增大;墩顶截面尺寸相同的桥墩,e/s最大值随着墩身坡率的减小而减小等结论。更多还原

【Abstract】 In this paper,the round end piers of the 32 m span simply supported T-beam of single track railway of 200 km/h are calculated and analyzed.On the premise that the pier size has been confirmed,the maximum value of e/s is analyzed,changing by the factors of the height of piers,the stiffness of piers,site classification,earthquake intensity,stiffness of entire piers and the position of piers on the line;At the same time,the influence on the maximum value of e/s by different slope ratios of pier is also analyzed on the conditions that the cross section size of pier top is the same.Ultimately it is concluded that the maximum value of e/s first increases and then decreases in the case of Class Ⅰ site soil,and when the pier height reaches around 9 m,the maximum value of e/s is the biggest.Under the conditions of Class Ⅲ site soil,however,the maximum value of e/s increases with the increase of the pier height with same slope ratio;the maximum value of e/s increases with the increase of the seismic intensity at the same pier height;for the piers with same size of cross section of pier top,the maximum value of e/s decreases with the decrease of the slope ratio of pier body.更多还原