【摘要】 针对预弯组合梁的施工特点，建立了一套综合考虑混凝土收缩、徐变及钢材松弛影响的时效分析方法。运用该方法可以完成预弯组合简支梁桥从预弯施工到通车运营以至若干年后，任意时刻梁体任意截面位置的应力、挠度的长期预测。更多还原

【Abstract】 Based on the construction peculiarity of preflexed beam bridges, an analytical method for predicating properties of the bridge structure is proposed in this paper, in which time dependent factors such as shrinkage, creep of concrete and relaxation of steel beams are synthetically considered, to forecast the long term properties of the new type of bridge structures. With this method, a longterm evaluation for stresses and deformation, on any section of the beams, at any time from the beginning of construction to opening, even to many years later, could be completed.更多还原