桥梁支座分为固定支座及活动支座两种。固定支座是起铰的作用,允许桥梁沿线路的竖直平面作自由转动。活动支座除这个作用外,还允许桥梁在活载及温度变化时,作纵向水平移动。 当桥梁位于坡道上时、固定支座应设在较低一端。这样做的目的有二:一是使桥台承受 Bridge bearings are divided into two kinds of fixed bearings and movable bearings. The fixed support is the hinge that allows the bridge to rotate freely along the vertical plane of the line. In addition to this role, the movable support allows the bridge to move longitudinally horizontally as the load and temperature change. When the bridge is located on the ramp, the fixed support should be located at the lower end. The purpose of doing so is twofold: First, to withstand Abutment