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一、桥梁支座的作用和要求
支座设置在桥梁的上部结构与墩台之间,它的作用是:
(1)传递上部结构的支承反力,包括恒载和活载引起的竖向力和水平力;
(2)保证结构在活载,温度变化,混凝土收缩和徐变等因素作用下能自由变形,以使上、下部结构的实际受力情况符合结构的静力图式。
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