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盈建科软件1楼板计算书日期:2017年11月23日时间:14时12分13秒一、基本资料:1、房间编号:12、楼板类型:现浇板3、边界条件(左端/下端/右端/上端):固定/固定/固定/固定/4、荷载:永久荷载标准值:g=5.00kN/m2可变荷载标准值:q=3.00kN/m25、跨度及板厚:计算跨度Lx=2900mm计算跨度Ly=6500mm板厚H=150mm保护层CovT=15mm,CovB=40mm6、材料:砼强度等级:C30钢筋强度等级:HRB4007、计算方法:弹性算法。8、泊松比:μ=1/5。9、考虑活荷载不利组合。二、计算结果:Mx=(0.04144+0.00321/5)*(1.20*5.00+1.40*0.5*3.00)*2.9^2=2.87kN·m考虑活载不利布置跨中X向应增加的弯矩:Mxa=(0.10398+0.01411/5)*(1.40*0.5*3.00)*2.9^2=1.89kN·mMx=2.86639+1.88627=4.75kN·mAsx=268.67mm2,实配:C8@150(As=335.1mm2)My=(0.04144/5+0.00321)*(1.20*5.00+1.40*0.5*3.00)*2.9^2=0.78kN·m考虑活载不利布置跨中Y向应增加的弯矩:Mya=(0.10398/5+0.01411)*(1.40*0.5*3.00)*2.9^2=0.62kN·mMy=0.78312+0.61654=1.40kN·m盈建科软件2Asy=268.67mm2,实配:C8@150(As=335.1mm2)Mx'=0.08311*(1.20*5.00+1.40*3.00)*2.9^2=7.13kN·mAsx'=268.67mm2,实配(左侧):C8@150(As=335.1mm2)Asx'=268.67mm2,实配(右侧):C8@150(As=335.1mm2)My'=0.05583*(1.20*5.00+1.40*3.00)*2.9^2=4.79kN·mAsy'=268.67mm2,实配(下侧):C8@150(As=335.1mm2)Asy'=268.67mm2,实配(上侧):C8@150(As=335.1mm2)三、裂缝宽度验算:1、X方向板带跨中裂缝:Mq=3.03kN·m,Ftk=2.01N/mm2,h0=106mm,As=335mm2矩形截面,Ate=0.5*b*h=0.5*1000*150=75000mm2ρte=335/75000=0.004当ρte<0.01时,取ρte=0.01σsq=Mq/(0.87*ho*As)(砼规式7.1.4-3)σsq=3.03*10^6/(0.87*106*335)=98.005N/mm2裂缝间纵向受拉钢筋应变不均匀系数ψ,按下列公式计算:ψ=1.1-0.65*ftk/(ρte*σsq)(砼规式7.1.2-2)ψ=1.1-0.65*2.01/(0.010*98.00)=-0.230当ψ<0.2时,取ψ=0.2ωmax=αcr*ψ*σsq/Es*(1.9c+0.08*Deq/ρte)(砼规式7.1.2-1)ωmax=1.9*0.20*98.00/200000*(1.9*40+0.08*8.00/0.01)=0.026ωmax=0.026=0.200mm,满足规范要求!2、Y方向板带跨中裂缝:Mq=0.89kN·m,Ftk=2.01N/mm2,h0=98mm,As=335mm2矩形截面,Ate=0.5*b*h=0.5*1000*150=75000mm2ρte=335/75000=0.004当ρte<0.01时,取ρte=0.01σsq=Mq/(0.87*ho*As)(砼规式7.1.4-3)σsq=0.89*10^6/(0.87*98*335)=31.218N/mm2裂缝间纵向受拉钢筋应变不均匀系数ψ,按下列公式计算:ψ=1.1-0.65*ftk/(ρte*σsq)(砼规式7.1.2-2)ψ=1.1-0.65*2.01/(0.010*31.22)=-3.077盈建科软件3当ψ<0.2时,取ψ=0.2ωmax=αcr*ψ*σsq/Es*(1.9c+0.08*Deq/ρte)(砼规式7.1.2-1)ωmax=1.9*0.20*31.22/200000*(1.9*40+0.08*8.00/0.01)=0.008ωmax=0.008=0.200mm,满足规范要求!3、左端支座跨中裂缝:Mq=4.54kN·m,Ftk=2.01N/mm2,h0=126mm,As=335mm2矩形截面,Ate=0.5*b*h=0.5*1000*150=75000mm2ρte=335/75000=0.004当ρte<0.01时,取ρte=0.01σsq=Mq/(0.87*ho*As)(砼规式7.1.4-3)σsq=4.54*10^6/(0.87*126*335)=123.683N/mm2裂缝间纵向受拉钢筋应变不均匀系数ψ,按下列公式计算:ψ=1.1-0.65*ftk/(ρte*σsq)(砼规式7.1.2-2)ψ=1.1-0.65*2.01/(0.010*123.68)=0.046当ψ<0.2时,取ψ=0.2ωmax=αcr*ψ*σsq/Es*(1.9c+0.08*Deq/ρte)(砼规式7.1.2-1)ωmax=1.9*0.20*123.68/200000*(1.9*20+0.08*8.00/0.01)=0.024ωmax=0.024=0.200mm,满足规范要求!4、下端支座跨中裂缝:Mq=3.05kN·m,Ftk=2.01N/mm2,h0=126mm,As=335mm2矩形截面,Ate=0.5*b*h=0.5*1000*150=75000mm2ρte=335/75000=0.004当ρte<0.01时,取ρte=0.01σsq=Mq/(0.87*ho*As)(砼规式7.1.4-3)σsq=3.05*10^6/(0.87*126*335)=83.078N/mm2裂缝间纵向受拉钢筋应变不均匀系数ψ,按下列公式计算:ψ=1.1-0.65*ftk/(ρte*σsq)(砼规式7.1.2-2)ψ=1.1-0.65*2.01/(0.010*83.08)=-0.470当ψ<0.2时,取ψ=0.2ωmax=αcr*ψ*σsq/Es*(1.9c+0.08*Deq/ρte)(砼规式7.1.2-1)ωmax=1.9*0.20*83.08/200000*(1.9*20+0.08*8.00/0.01)=0.016ωmax=0.016=0.200mm,满足规范要求!盈建科软件45、右端支座跨中裂缝:Mq=4.54kN·m,Ftk=2.01N/mm2,h0=126mm,As=335mm2矩形截面,Ate=0.5*b*h=0.5*1000*150=75000mm2ρte=335/75000=0.004当ρte<0.01时,取ρte=0.01σsq=Mq/(0.87*ho*As)(砼规式7.1.4-3)σsq=4.54*10^6/(0.87*126*335)=123.683N/mm2裂缝间纵向受拉钢筋应变不均匀系数ψ,按下列公式计算:ψ=1.1-0.65*ftk/(ρte*σsq)(砼规式7.1.2-2)ψ=1.1-0.65*2.01/(0.010*123.68)=0.046当ψ<0.2时,取ψ=0.2ωmax=αcr*ψ*σsq/Es*(1.9c+0.08*Deq/ρte)(砼规式7.1.2-1)ωmax=1.9*0.20*123.68/200000*(1.9*20+0.08*8.00/0.01)=0.024ωmax=0.024=0.200mm,满足规范要求!6、上端支座跨中裂缝:Mq=3.05kN·m,Ftk=2.01N/mm2,h0=126mm,As=335mm2矩形截面,Ate=0.5*b*h=0.5*1000*150=75000mm2ρte=335/75000=0.004当ρte<0.01时,取ρte=0.01σsq=Mq/(0.87*ho*As)(砼规式7.1.4-3)σsq=3.05*10^6/(0.87*126*335)=83.078N/mm2裂缝间纵向受拉钢筋应变不均匀系数ψ,按下列公式计算:ψ=1.1-0.65*ftk/(ρte*σsq)(砼规式7.1.2-2)ψ=1.1-0.65*2.01/(0.010*83.08)=-0.470当ψ<0.2时,取ψ=0.2ωmax=αcr*ψ*σsq/Es*(1.9c+0.08*Deq/ρte)(砼规式7.1.2-1)ωmax=1.9*0.20*83.08/200000*(1.9*20+0.08*8.00/0.01)=0.016ωmax=0.016=0.200mm,满足规范要求!四、跨中挠度验算:X方向挠度验算参数:Mq--------按荷载效应的准永久组合计算的弯矩值Mq=3.03kN·m,h0=106mm,As=335mm2盈建科软件5Es=200000N/mm2,Ec=29791N/mm2,Fy=360N/mm2,Ftk=2.01N/mm21、裂缝间纵向受拉钢筋应变不均匀系数ψ:矩形截面,Ate=0.5*b*h=0.5*1000*150=75000mm2ρte=335/75000=0.004σsq=Mq/(0.87*ho*As)(砼规式7.1.4-3)σsq=3.03*10^6/(0.87*106*335)=98.005N/mm2裂缝间纵向受拉钢筋应变不均匀系数ψ,按下列公式计算:ψ=1.1-0.65*ftk/(ρte*σsq)(砼规式7.1.2-2)ψ=1.1-0.65*2.01/(0.004*98.00)=-1.878当ψ<0.2时,取ψ=0.22、钢筋弹性模量与混凝土模量的比值αE:αE=Es/Ec=200000/29791=6.7133、受压翼缘面积与腹板有效面积的比值γf':矩形截面,γf'=04、纵向受拉钢筋配筋率:ρ=As/b/ho=335/1000/106=0.003165、钢筋混凝土受弯构件的Bs按公式(砼规式7.2.3-1)计算:Bs=Es*As*ho^2/[1.15ψ+0.2+6*αE*ρ/(1+3.5γf')]Bs=200000*335*106^2/[1.15*0.200+0.2+6*6.713*0.00316/(1+3.5*0)]=1351.1462kN·m26、考虑荷载长期效应组合对挠度影响增大影响系数θ:按砼规第7.2.5条,当ρ'=0时,θ=2.07、受弯构件的长期刚度B,可按下列公式计算:B=Bs/θ(砼规式7.2.2-2)B=1351.14/2=675.578、跨中挠度可按下列公式计算:def=k*Ql*L^4/Bdef=0.00258*6.50*2.90^4*10^3/675.57=1.756mmf/L=1.756/2.90*1000=1/1652,满足规范要求!Y方向挠度验算参数:Mq--------按荷载效应的准永久组合计算的弯矩值Mq=0.89kN·m,h0=98mm,As=335mm2Es=200000N/mm2,Ec=29791N/mm2,Fy=360N/mm2,Ftk=2.01N/mm21、裂缝间纵向受拉钢筋应变不均匀系数ψ:矩形截面,Ate=0.5*b*h=0.5*1000*150=75000mm2ρte=335/75000=0.004σsq=Mq/(0.87*ho*As)(砼规式7.1.4-3)盈建科软件6σsq=0.89*10^6/(0.87*98*335)=31.218N/mm2裂缝间纵向受拉钢筋应变不均匀系数ψ,按下列公式计算:ψ=1.1-0.65*ftk/(ρte*σsq)(砼规式7.1.2-2)ψ=1.1-0.65*2.01/(0.004*31.22)=-8.248当ψ<0.2时,取ψ=0.22、钢筋弹性模量与混凝土模量的比值αE:αE=Es/Ec=200000/29791=6.7133、受压翼缘面积与腹板有效面积的比值γf':矩形截面,γf'=04、纵向受拉钢筋配筋率:
本文标题:板计算书
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