预弯组合梁桥的全时程时效分析理论及其应用

Preflexed beam bridges long-term properties analysis theory and its application

针对预弯组合梁的施工特点 ,建立了一套综合考虑混凝土的收缩、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梁从预弯施工到通车运营以至若干年后 ,任意时刻任意梁体任意截面位置的应力、挠度的长期预测 .分析方法已通过了实验验证 。

Based on the construction peculiarity of preflexed beam bridges, an analytical method is proposed for predicting properties of bridges structures. By which, time dependent factors such as shrinkage ?creep of concrete and relaxation of steel beams are synthetically considered for forecasting of long term properties of new type of bridge structures. A long term evaluation can be done for stresses and deformation at any section of beams and at any time from beginning to end of construction.