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C25强度类型C20C25fck=16.7(N/mm2)混凝土抗压强度标准值fckfckN/mm213.416.7ftk=1.78(N/mm2)混凝土抗拉强度标准值ftkftkN/mm21.541.78fc=11.9(N/mm2)混凝土抗压强度设计值fckfcN/mm29.611.9ft=1.27(N/mm2)混凝土抗拉强度设计值ftftN/mm21.11.27Ec=28000(N/mm2)混凝土弹性模量EcEcN/mm22550028000HPB235强度类型HPB235HRB335fyv=210(N/mm2)箍筋抗拉压强度设计值fyvfyvN/mm2210300HRB335强度类型HPB235HRB335fy=300(N/mm2)纵筋抗拉压强度设计值fyfyN/mm2210300Es=200000(N/mm2)EsN/mm2210000200000β1=0.800.8C50内插C800.74直径8~206~50ξb=0.55ξb=β1/(1+fy/0.0033Es)αE=7.14αE=Es/EcC?(20,25,30,35,40,45,50,55)混凝土等级钢筋和混凝土指标混凝土强度及弹性模量HRB(235,335,400)纵筋强度等级HPB(235,335,400)箍筋强度等级C30C35C40C45C50C5520.123.426.829.632.435.52.012.22.392.512.642.7414.316.719.121.123.125.31.431.571.711.81.891.96300003150032500335003450035500HRB400360HRB4003602000006~50混凝土强度及弹性模量bx=300(mm)长边梁宽度bxhx=600(mm)长边梁高度hxlcx=3.900(m)长边梁支座间距lcxcx=35(mm)长边梁保护层厚度cxh0x=565(mm)长边梁有效高度h0xlnx=3.600(m)长边梁净跨lnx=lcx-bylx=3.900(m)长边梁计算跨度lx=lcxby=300(mm)短边梁宽度byhy=1000(mm)短边梁高度hylcy=3.000(m)短边梁支座间距lcycy=35(mm)短边梁保护层厚度cyh0y=965(mm)短边梁有效高度h0ylny=2.700(m)短边梁净跨lny=lcy-byly=3.000(m)短边梁计算跨度ly=lcyb=1000(mm)板宽b取1m宽板带h=250(mm)板厚hc0=20(mm)板保护层厚度c0h0=230(mm)板有效高度h0l0x=3.600(m)计算跨度l0x=lnl0y=2.700(m)计算跨度l0y=lnyα=1.78α=(l0x/l0y)^2β=2.00β=2.0短边梁板长边梁双向板楼盖梁板尺寸
本文标题:%双向板计算1
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