钢结构螺栓连接规范

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1、钢结构高强度螺栓连接施工工艺标准高强度螺栓连接副的安装1.高强度螺栓长度应按下式计算L=L’+ΔL式中L’——连接板层总厚度ΔL——附加长度ΔL=m+ns+3pM——高强度螺母公称厚度；N——垫圈个数，扭剪型高强度螺栓为1，高强度大六角螺栓为2；S——高强度垫圈公称厚度；P——螺纹的螺距螺栓螺母性能表1钢结构用高强度螺栓连接副型号、规格、类型名称性能等级规格连接副组成GB/T1228-91钢结构用高强度大六角头螺栓10.9S8.8SM12-M30一件螺栓；一件螺母；二件垫圈GB/T1229-91钢结构用高强度大六角螺母G

2、B/T1230-91钢结构用高强度垫圈GB/T1231-91钢结构用高强度大六角头螺栓、大六角螺母、垫圈技术条件GB/T3632-1995钢结构用扭剪型高强度螺栓连接副10.9SM16-M24一件螺栓；一件螺母；一件垫圈GB/T3633-1995钢结构用扭剪型高强度螺栓连接副技术条件2.材料类型性能等级螺纹规格选用材料螺栓10.9SM12~M2420MntiBM27~M3035VB8.8SM12~M1635#M20~M2420MnTibM27~M3035VB螺母8H10HM12~M3035#垫圈35~45HRC12~30

3、45#3.材料的化学成分材料C%Si%Mn%Ti%V%B%P%S%20MnTiB0.17~0.240.17~0.371.30~1.600.04~0.1000.0005~0.0035≤0.035≤0.03535VB0.31~0.370.17~0.370.50~0.900.05~0.120.001~0.004≤0.04≤0.0435#0.32~0.400.17~0.370.50~0.90≤0.035≤0.03545#0.42~0.50.17~00.50~0.9≤≤0.3700.0350.0354.GB/T1228-91钢结构

4、用高强度大六角头螺栓型式尺寸螺纹规格dM12M16M20M22M24M27M30螺距p1.7522.52.5333.5Cmax0.80.80.80.80.80.80.8min0.40.40.40.40.40.40.4damax15.2319.2324.3226.3228.3232.8435.84dsmax12.4316.4320.5222.5224.5227.8430.84min11.7515.5719.4821.4823.4826.16.29.16dwmin19.221.931.433.338.042.846.5emi

5、n22.7829.5637.2939.5545.2050.8555.37k公称7.51012.514151718.7max7.9510.7513.4014.9015.9017.9019.75min7.059.2511.6013.1014.1016.1017.65rmin1.01.01.51.51.52.02.0smax21273436414650min20.1620.163335404549bL公称＜45≥45＜55≥55＜65≥65﹤70≥70＜75≥75＜80≥80＜85≥85公称253030353540404545

6、50505555605.GB/T1229-91钢结构用高强度大六角螺母型尺寸螺纹规格DM12M16M20M22M24M27M30螺距P1.7522.52.5333.5cmax0.80.80.80.80.80.80.8min0.40.40.40.40.40.40.4damax1317.321.623.825.929.132.4min12162022242730dwmin19.224.931.433.338.042.846.5emin22.7829.5637.2939.5545.2050.8555.37mmax12.317.

7、120.723.624.227.630.7min11.8716.419.422.322.926.329.1smax21273436414650min20.1626.1633354045496.GB/T1230-91钢结构用高强度垫圈型式尺寸规格（螺纹大径）12162022242730d1max13.4317.4321.5223.5225.5228.5231.52min13172123252831d2max25334042475256min23.731.438.440.445.450.154.1s公称3.04.04.05.

8、05.05.05.0max3.84.84.85.85.85.85.8min2.53.53.54.54.54.54.5d3max16.0320.0325.1227.1229.1233.6436.64min15.2319.2324.3226.3228.3232.8435.84