提問人:賈志鵬 2024-10-31 21:49:41 瀏覽:4202
1.6~8為梯段板斜板的自重,計算方法:
a.荷載標準值:
可變荷載:q = 3.50kn/m2 面層荷載:qm = 1.70kn/m2
欄桿荷載:qf = 0.20kn/m
b. 樓梯幾何參數:
踏步高度:h = 0.1438 m
梯板厚: t = 100 mm
踏步寬度:b = 0.3000 m
計算跨度:l0 = l1+l3+(b1+b2)/2 = 2.10+1.00+(0.20+0.20)/2 = 3.30 m
梯段板與水平方向夾角余弦值:cosα = 0.902
c. 荷載計算( 取 b = 1m 寬板帶):
(1) 梯段板:
面層:gkm = (b+b*h/b)*qm = (1+1*0.14/0.30)*1.70 = 2.51 kn/m
自重:gkt = rc*b*(t/cosα+h/2) = 25*1*(0.10/0.902+0.14/2) = 4.57 kn/m
抹灰:gks = rs*b*c/cosα = 20*1*0.02/0.902 = 0.44 kn/m
恒荷標準值:pk = gkm+gkt+gks+qf = 2.51+4.57+0.44+0.20 = 7.73 kn/m
2.將換算后的梯板面荷載(6~8)+樓梯活荷載 按照單、雙向板的分配原則換算到梁上,得到梁上線荷載.