间支座-44.1173.84-96.2360.34-70.610.0920.0160.20.0130.1470.097<0.016<0.225<0.013<0.159<0.9520.9920.8870.9930.920376.6605.2882.0494.0624.0选配钢筋216220220+118218216+118实配钢筋面积/402628882.5509656.5注:,均大于,考虑塑性内力重分布要求,满足表6次梁斜截面承载力计算截面边支座第一支座(外)第一支座(内)中间支座88.9597.8594.5694.56293150>V293150>V293150>V293150>V82082<V82082<V82082<V82082<V选用箍筋2Φ82Φ82Φ82Φ8100.6100.6100.6100.6S=1621.5706.3892.5892.5实配箍筋间距(mm)2002002002004主梁计算主梁按弹性理论计算主梁内力,不考虑塑性内力重分布。已知柱截面尺寸为450mm×450mm,主梁的梁高h=650mm,宽b=250mm,主梁的几何尺寸与支承情况如图6所示。图6主梁几何尺寸及支承情况(单位:mm)4.1荷载①恒荷载由次梁传来主梁自重(折算为集中荷载)梁侧抹灰(折算为集中荷载)2×0.015×(0.65-0.08)×2.0×17=0.58kN=53.19kN②使用活荷载③荷载组合设计值+=1.2+1.3=1.2×53.19+1.3×96.0=188.63kN+=1.35+1.3×0.7=1.35×53.19+1.3×0.7×96.0=159.17kN取=1.2×53.19=63.83kN=1.35×96.0=124.8kN4.2内力计算计算跨度如下:中间跨:边跨:中间跨跨度和边跨跨度相等,故可按等跨连续次梁计算。计算简图见下图7。图7主梁计算简图(尺寸单位m)
全文预览