稳定性验算
主楼稳定性验算
车库垫层底-6.870m(室内外高差0.45m)
18层住宅楼宽16.0m,长49m,层高2.9m基底标高-7.550m,褥垫层底-7.850m,
室内外高差0.45m,室内0.000,绝对高程17.750m,基础为CFG复合地基,承载力250kPa,车库天然地基140kPa。
住宅楼总高H=2.9x18+0.45=52.65m,地面粗糙度B类,基本风压0.4kN/m2,uz=1.70,T1=1.19s
W0=0.40kN/m2, W0*T1*T1=0.57,脉动增大系数=1.37,脉动影响系数v=0.5,风振系数=1.40,风荷载标准值=1.40x1.3x1.70x0.4=1.235kN/m2 qk=1.235x49=60.5kN/m,
等效刚度=11*q*H4/(120u)=11*60.5*52.654/(120x0.01)=4.26x109kN.m2 每层恒荷载14kN/m2,活荷载2.0kN/m2,G=(1.2x14)x20x16x49=2.63x105 H=52.65+6.870-0.45=59.07m
1.4*H2*G =1.4x59.072*2.63x105=1.28x109kN.m2
等效刚度=4.26x109kN.m2>1.4*H2*G=1.28x109kN.m2,满足稳定要求
工程概况
沿主楼长边一侧开挖地下车库,其他三侧无堆荷,
住宅楼总高H=2.9x18+0.45=52.65m,地面粗糙度B类
车库垫层底-6.870m(室内外高差0.45m)
18层住宅楼宽16.0m,长49m,层高2.9m基底标高-7.550m,褥垫层底-7.850m,
室内外高差0.45m,室内0.000,绝对高程17.750m,基础为CFG复合地基,承载力250kPa,车库天然地基140kPa。