钢结构用柱脚锚栓选用表

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1、第一节锚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。267表7-5-1Q235钢锚栓选用表锚栓直径d(mm)锚栓截面有效

2、面积A0(cm)连接尺寸锚固长度及细部尺寸每个螺栓的受拉承载力设计值(KN)Ⅰ型Ⅱ型Ⅲ型单螺母双螺母锚固长度l(mm)锚板尺寸a(mm)b(mm)a(mm)b(mm)当基础混凝土的强度等级为C(mm)t(mm)C15C20C15C20C15C20202224273033363942452.4483.0343.5254.5945.6066.9368.1679.75811.2113.0645455050555560657075757580808590951001051106065707580859095100105909510010511012012513013514050

3、0550600675750825900100040044048054060066072078010501125840900630675505540140140202034.342.549.464.378.597.1114.3136.6156.9182.8267表7-5-2Q235钢锚栓选用表锚栓直径d(mm)锚栓截面有效面积A0(cm)连接尺寸锚固长度及细部尺寸每个螺栓的受拉承载力设计值(KN)Ⅰ型Ⅱ型Ⅲ型单螺母双螺母锚固长度l(mm)锚板尺寸a(mm)b(mm)a(mm)b(mm)当基础混凝土的强度等级为C(mm)t(mm)C15C20C15C20C15C204852

4、5660646872768014.7317.5820.3023.6226.7630.5534.6038.8943.448085909510010511011512012012513013514515015516016511012013014015016017018019015016017018019520521522523512001300140015001600170018001900200096010401120120012801360144015201600720780840900960102010801140120057562567072077081586591

5、0960200200200240240280280320350202020252530303040206.2246.1284.2330.7374.6427.7484.4544.5608.2267表7-5-3Q235钢锚栓选用表锚栓直径d(mm)锚栓截面有效面积A0(cm)连接尺寸锚固长度及细部尺寸每个螺栓的受拉承载力设计值(KN)Ⅰ型Ⅱ型Ⅲ型单螺母双螺母锚固长度l(mm)锚板尺寸a(mm)b(mm)a(mm)b(mm)当基础混凝土的强度等级为C(mm)t(mm)C15C20C15C20C15C2085909510049.4855.9162.7369.9513014015

6、0160180190200210200210220230250260270280212522502375250017001800190020001275135014251500102010801140120035040045050040404545692.7782.7878.2979.3267表7-6-1Q345钢锚栓选用表锚栓直径d(mm)锚栓截面有效面积A0(cm)连接尺寸锚固长度及细部尺寸每个螺栓的受拉承载力设计值(KN)Ⅰ型Ⅱ型Ⅲ型单螺母双螺母锚固长度l(mm)锚板尺寸a(mm)b(mm)a(mm)b(mm)当基础混凝土的强度等级为C(mm)t(mm)C15C2

7、0C15C20C15C20202224273033363942452.4483.0343.5254.5945.6066.9368.1679.75811.2113.064545505055556065707575758080859095100105110606570758085909510010590951001051101201251301351406006607208109009901080117050055060067575062590010001260135010501125755810630675140140202044.154.