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1 桥梁支座的作用、分类与布置 桥梁支座的主要作用是将桥跨结构上的恒载与活载反力传递到桥梁的墩台上去,同时保证桥跨结构所要求的位移与转动,以便使结构的实际受力情况与计算的理论图式相符合。 下面介绍几种支座,如图1所示。 简支梁桥的支座由一个固定支座和一个活动支座组成。多扎连续梁桥则由一个固定支座和几个活动支座组成。固定支座可以使桥跨结构发生转动但不能移动。活动支座则保证桥跨结构在温度变化、混凝土胀缩和竖向荷载作用下能自由地活动。对于城市中常
1 The role of the bridge bearing, classification and layout Bridge bearing the main role is to bridge the structure of the constant load and live load transfer to the abutment of the bridge pier, at the same time to ensure that the required cross-bridge structure displacement and rotation, In order to make the structure of the actual force situation and calculate the theoretical schemata. Here are some kinds of bearings, as shown in Figure 1. Simple support beam bridge by a fixed bearing and a movable bearing composition. Continuous multi-tie beam bridge by a fixed bearing and a few moving support components. Fixed bearings can make the bridge structure but can not rotate. The movable support ensures that the bridge structure can move freely under the influence of temperature changes, concrete expansion and contraction and vertical load. For the city often