钢结构锚固地脚螺栓选用表.pdf

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1、锚固螺栓锚栓用于上部钢结构与下部基础的连接，承受柱弯矩在柱脚底板与基础间产生的拉力，剪力由柱底板与基础面之间的摩擦力抵抗，若摩擦力不足以抵抗剪力，则需在柱底板上焊接抗剪键以增大抗剪能力。锚栓一头埋入混凝土中，埋入的长度要以混凝土对其的握裹力不小于其自身强度为原则，所以对于不同的混凝土标号和锚栓强度，所需最小埋入长度也不一样。为了增加握裹力，对于Φ39以下锚栓，需将其下端弯成L型，弯钩的长度为4D；对于Φ39以上锚栓，因其直径过大不便于折弯，则在其下端焊接锚固板。锚栓的锚固及构造详见表7-5与表7-6。259表7-5

2、-1Q235钢锚栓选用表锚栓直径锚栓截面连接尺寸锚固长度及细部尺寸每个螺栓Ⅰ型Ⅱ型Ⅲ型的受拉承载力设计有效面积值dA0单螺母双螺母锚固长度l(mm)锚板尺寸tNaabab当基础混凝土的强度等级为Ct(mm)(cm)(mm)(mm)(mm)(mm)C15C20C15C20C15C20(mm)(mm)(KN)202.4484575609050040034.3223.0344575659555044042.5243.52550807010060048049.4274.59450807510567554064.3305.6

3、0655858011075060078.5336.93655908512082566097.1368.167609590125900720114.3399.75865100951301000780136.64211.2170105100135105084063050514020156.94513.0675110105140112590067554014020182.8260表7-5-2Q235钢锚栓选用表锚栓直径锚栓截面连接尺寸锚固长度及细部尺寸每个螺栓Ⅰ型Ⅱ型Ⅲ型的受拉承载力设计有效面积值dA0单螺母双螺母锚固长

4、度l(mm)锚板尺寸tNaabab当基础混凝土的强度等级为Ct(mm)(cm)(mm)(mm)(mm)(mm)C15C20C15C20C15C20(mm)(mm)(KN)4814.7380120110150120096072057520020206.25217.58851251201601300104078062520020246.15620.30901301301701400112084067020020284.26023.62951351401801500120090072024025330.76426.761

5、001451501951600128096077024025374.66830.5510515016020517001360102081528030427.77234.6011015517021518001440108086528030484.47638.8911516018022519001520114091032030544.58043.4412016519023520001600120096035040608.2261表7-5-3Q235钢锚栓选用表锚栓直径锚栓截面连接尺寸锚固长度及细部尺寸每个螺栓Ⅰ型Ⅱ型Ⅲ

6、型的受拉承载力设计有效面积值dA0单螺母双螺母锚固长度l(mm)锚板尺寸tNaabab当基础混凝土的强度等级为Ct(mm)(cm)(mm)(mm)(mm)(mm)C15C20C15C20C15C20(mm)(mm)(KN)8549.48130180200250212517001275102035040692.79055.91140190210260225018001350108040040782.79562.73150200220270237519001425114045045878.210069.95160210

7、230280250020001500120050045979.3262表7-6-1Q345钢锚栓选用表锚栓直径锚栓截面连接尺寸锚固长度及细部尺寸每个螺栓Ⅰ型Ⅱ型Ⅲ型的受拉承载力设计有效面积值dA0单螺母双螺母锚固长度l(mm)锚板尺寸tNaabab当基础混凝土的强度等级为Ct(mm)(cm)(mm)(mm)(mm)(mm)C15C20C15C20C15C20(mm)(mm)(KN)202.4484575609060050044.1223.0344575659566055054.6243.52550807010072

8、060063.5274.59450807510581067582.7305.606558580110900750100.9336.936559085120990625124.8368.1676095901251080900147.0399.758651009513011701000175.64211.21701051001351260105075563014