b=250mmD轴与B轴对称,计算数据取值均与B轴相同取h=700mm,b=250(3)横向次梁l0=6.7m,h=(1/10~1/14)l0=670~479mm取h=600mmb=(1/2~1/3)h=300~200mm取b=250mm(4)纵向连梁l0=7.8m,h=(1/10~1/14)l0=780~557mm取h=650mmb=(1/2~1/3)h=325~233mm取b=250mm(5)轴⑦-⑧与⑧-⑨间卫生间次梁l0=3.9m,h=(1/10~1/14)l0=390~279mm取h=300mm...b=(1/2~1/3)h=150~100mm取b=200mm(6)室外楼梯连梁(横纵尺寸相同)l0=3.0m,h=(1/10~1/14)l0=300~214mm取h=300mmb=(1/2~1/3)h=150~100mm取b=200mm由于类似悬挑,受力变形较大因此按框架梁要求选取框架柱截面尺寸确定(1)按轴压比要求初估框架柱截面尺寸框架柱的受荷面积如图1.5,框架柱选用C30混凝土,fc=14.3N/mm2。框架抗震等级为三级,轴压比μN=0.9,由轴压比初步估算框架柱截面尺寸时按式计算,柱轴向压力设计值按式????21SnNG?计算。1)轴⑦与轴B相交中柱????21SnNG?=1.25×14×(4.85×7.8)×6×1.05×1.0×1.0=4171(kN)因为bchc=600×600=360000(mm2)故取中柱截面尺寸600mm×600mm2)轴⑦与轴A相交边柱????21SnNG?=1.25×14×(3.35×7.8)×6×1.05×1.0×1.0=3169(kN)考虑到边柱承受偏心荷载且跨度较大,故取A轴边柱截面尺寸为600mm×600mm3)轴⑨fNhbA???)(3431303.1485.???????)(2607083.1485.???????
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