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楼梯的滑动支座是必须设置的吗？麻烦详细说说。_其他_设计456问答
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楼梯的滑动支座是必须设置的吗？麻烦详细说说。
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4个答案
楼梯梯梁和平台梁区别：楼梯休息平台梁无支座，增加支座或改为板式楼梯，在填充墙里面加暗柱也可以。楼梯平台按所处的位置和标高不同，有中间平台和楼层平台之分，两种平台都是休息平台。两楼层之间的平台称为中间平台，用来供人们行走和改变行进方向。
楼梯的滑动支座是应该设置的。剪力墙结构假如楼梯四周均有剪力墙，特别是楼梯半平台所连接的三侧有剪力墙，可以不做滑动支座。模型中也可以不建楼梯。框架结构通常要求做滑动楼梯，假如你实在不想做的话，那么应该考量楼梯对整体刚度的影响，即比较把楼梯建到整体模型中去计算。
在楼梯梯板下端与梯柱之间设置楼梯间减震防倒塌支座（简称LTZZ），将地震作用下梯板的“剪刀支撑“效应释放，弱化楼构件对主体结构抗震性能的影响。同时，LTZZ作为二道防线，保证楼梯结构具有足够的富余约束和抗倒塌能力，使楼梯间大震时作为主要通道的功能不中断，起到”安全岛“作用。
楼梯梁为非框架梁，无论它锚固进的是否是框架，都是一样，见11G101-1第86页大样。负筋进支座平直段≧0.35Lab后转折15d，底筋进支座12d且过支座中线。
