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第一节顺桥向的抗震计算从第二篇的桥梁震害的分析,我们看到在刚性地基和非刚性地基上桥梁在顺桥向的受力有着很大的区别,在刚性地基上,桥梁只承受由本身质量产生的地震荷载与台背填土产生的动土压力,它不存在基础变位引起的内力,也不存在岸坡滑移而产生的对墩台的移动动土压力,因而这种地基上桥梁支座所受的剪力和墩台所受的剪力和弯矩,主要是由上部结构在地震中产生的地震荷载所引起,因而它的力的传递方式主要是由上而下。然而在非刚性地基上,岸坡滑移对墩台产生的移动动土压力却是由下向上传递。因地基
Section 1 Anticorrosion Calculation of Bridges Along the Bridge From the analysis of the second chapter of seismic damage, we can see that there is a great difference between the bridge and the bridge in rigid foundation and non-rigid foundation. In rigid foundation, The bridge only bear the earthquakes caused by its own quality and earth-moving pressure generated by the backfill, it does not exist the internal forces caused by the basic displacements, and there is also no moving earth pressure on the abutment caused by the landslide. Therefore, Shear and moment suffered by bridge abutments on the ground are mainly caused by the seismic load generated by the superstructure in the earthquake. Therefore, the force is mainly transmitted from top to bottom . However, on non-rigid foundations, the earth pressure caused by bank slip on the abutment is transferred from bottom to top. Because of the foundation