钢筋搭接长度与混凝土强度、抗震等级的约束关系_图文

1、附表1钢 筋 搭 接 长 度 要 求抗震等级混凝土强 度等 级钢 筋种 类（普通钢筋）钢筋直径（mm）纵向受拉钢筋绑扎搭接长度（lle）GB50204-2002（规范）03 G101-1（图集）规范与图集搭接长度差值纵向受拉钢筋最小锚固长度1.2×1.15×最小锚固长度纵向受拉钢筋抗震锚固长度1.4×抗震锚固长度（d）（cm）（d）（cm）规范图集（cm）一级二级C20HPB235835 d48.3 d38.636 d50.4 d40.3-1.71048.350.4-2.1HRB3351245 d62.1 d74.544 d61.6 d73.9+0.61486.9

2、86.2+0.71699.498.6+0.818111.8110.9+0.920124.2123.2+1.0HRB400RRB400855 d75.9 d60.753 d74.2 d59.4+1.31075.974.2+1.71291.189.0+2.114106.3103.9+2.416121.4118.7+2.718136.6133.6+3.020151.8148.4+3.4一级二级C25HPB235835 d48.3 d38.631 d43.4 d34.7+3.91048.343.4+4.9HRB3351245 d62.1 d74.538 d53.2 d63.8+10.71486.974

3、.5+12.41699.485.1+14.318111.895.8+16.020124.2106.4+17.8HRB400RRB400855 d75.9 d60.746 d64.4 d51.5+9.21075.964.4+11.51291.177.3+13.814106.390.2+16.116121.4103.0+18.418136.6115.9+20.720151.8128.8+23.0一级二级C30HPB235830 d41.4 d33.127 d37.8 d30.2+2.91041.437.8+3.6HRB3351235 d48.3 d58.034 d47.6 d57.1+0.9146

4、7.666.6+1.01677.376.2+1.11886.985.7+1.22096.695.2+1.4钢 筋 搭 接 长 度 要 求抗震等级混凝土强 度等 级钢 筋种 类（普通钢筋）钢筋直径（mm）纵向受拉钢筋绑扎搭接长度（lle）GB50204-2002（规范）03 G101-1（图集）规范与图集搭接长度差值纵向受拉钢筋最小锚固长度1.2×1.15×最小锚固长度纵向受拉钢筋抗震锚固长度1.4×抗震锚固长度（d）（cm）（d）（cm）规范图集（cm）一级二级C30HRB400RRB400840 d55.2 d44.241 d57.4 d45.9-1.71055

5、.257.4-2.21266.268.9-2.71477.380.4-3.11688.391.8-3.51899.4103.3-3.920110.4114.8-4.4一级二级C35HPB235830 d41.4 d33.125 d35 d28.0+5.11041.435.0+6.4HRB3351235 d48.3 d58.031 d43.4 d52.1+5.91467.660.8+6.81677.369.4+7.91886.978.1+8.82096.686.8+9.8HRB400RRB400840d55.2 d44.237 d51.8 d41.4+2.81055.251.8+3.41266.

6、262.2+4.01477.372.5+4.81688.382.9+5.41899.493.2+6.220110.4103.6+6.8一级二级C40HPB235825 d34.5 d27.623d32.2d25.8+1.81034.532.2+2.3HRB3351230d41.4d49.729d40.6d48.7+1.01458.056.8+1.21666.265.0+1.21874.573.1+1.42082.881.2+1.6HRB400RRB400835d48.3 d38.634d47.6d38.1+0.51048.347.6+0.71258.057.1+0.91467.666.6+1.

7、01677.376.2+1.11886.985.7+1.22096.695.2+1.4说明： 1、钢筋搭接接头面积百分率全部按大于25%，但不大于50%考虑。2、表中按GB50204-2002规定，搭接长度的计算公式为lle=1.2×1.15×纵向受拉钢筋最小搭接长度。其中1.23、表中按03G101-1规定，搭接长度的计算公式为：lle=1.4×lae 。 其中1.4为纵向受拉钢筋搭接接头面积百分率修正系数，lae为纵向受拉钢筋抗震锚固长度，可查阅03G101-1。4、普通工程的搭接长度按照设计指定的做法，可以依据图集，也可以依据规范。5、参加结构长城杯评比的工程，按照“就高不就低”的原则，取搭接长度较大值。另按长城杯检查要求，墙体竖向钢筋搭接长度范围内必须保证有三根水平筋通过，若水平筋间距20cm，水平起步筋5cm，搭接区内必