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1、J7阶梯基础计算项目名尊日M设计*校对*一、设计依据E建筑地基基础设计规他(GB50007-201.1)(混凝土结构设计规范(GB50010-2010)二、不意图三、计算信息构件编号:JC1.计算类型:验尊限而尺寸I.几何参数台阶数n=1.hc=50Onn矩形柱宽bc=50Oa矩形柱高基础高度h1.-500mn一阶长度b1.=105011mb2=100Onm一阶宽度a1.=1.050mma2=105011m2 .材料信息域础混凝土等级:C30ft1.43Nnfc_b=14.3Nm柱混凝土等级:C30ft.c=1.43Nmfc.c=14.3Nm钢筋级别:IIKB-100fy=360Nm3 .计算
2、信息结构重要性系数:Y0=1.OO基础埋深:dh=2.500m纵筋合力点至近边距离:as=W11m基础及其上覆士的平均容H1.:=20.OOOkN/最小配笳率:Pin=0.1504 .作用在基础顶部荷载标准组合值F=1500.OOOkNMx=-20.OOOkN*11My=-5,OOOkNtmVx=-5.OOOkNVy=20.OOOkNks=1.25Fk=FZks=1500.000/1.25=1200.OOOkNMxk-Mx/ks-20.000/1.25、16.00Okvm,Myk=Myks=-5.0001.25=-1.(00kX*mVk=Vxks=-5.000/1.25=-4.OOOkNVyk
3、=Vyks=20.000/1.25=16.OOOkN5 .修正后的地基承我力特征值fa=240.OOOkPa四、计算1 .基础总长Bx=b1.+b2+bc=1.050+1.050).500=2,600m2 .基础总宽ByaHa2*hc1.050H.050*0.500-2.600mA1.=a1.hc2=1.050+0.500/2=1.300aA2=a2+hc2=1.050+0.500/2=1.BOOmB1.=b1.+bc2=1.050+0.500/2=1.300bB2=b2+bc2=1.050+0.500/2=1.300m3 .基础总离H=h1.=O.500=0.50(4 .底板配筋计算高度ho
4、=h1.-as=0.5000.040=0.460m5 .基础底面积A=BX*By=2.600*2.6(K)=6.7606 .Gk=y*Bx*By*dh=20.0002.600*2.600*2.500=338.OOOkNG=1.35*Gk=1.35*338.000=456.300kN五、计算作用在基础底部弯矩值Mdxk=Mxk-Vyk*!=-16.000-16.000*0.500=-24.00OkNMdyk=Myk+Vk*H=-4.000(-1.000)*0.500=-6.000kN*mMdX=MX-Vy*H=-20.000-20.0000.500=-30.OOOkN*.Mdy-MyH,xMk-
5、5.0001(-5.000)*0.500-7.500kN*三六、改墓地茶承力5.2.1-21 .蕤算轴心荷载作用下地携承我力Pk=(Fk+k)/A=(1200.OeIO+338,000)/6.760=227.515kPa因yopk=1.00*227.515=227.515kPafa=240.OOOkPa轴心荷我作用下地基承我力满足要求2 .蕤算儡心荷载作用下的地携承效力xk=Mdyk/(Fk-KJk)=-6,000/(1200.000+338.000)=-0.004m因IeXkBxfr-i0.133mX方向小信心,由公式(5.2.2-2和105.2.2-3】推导PkmaxX=(Fkyk)/A+
6、6*Mdyk(B*By)=(1200.W)O+338.000)/6.760+6*-6.0001/(2.60*2.600)-229.563kPaPkmin-X=(Fk+GkA-6*Mdyk(B*By)=(1200.000+338.000)/6.760-6*i-6.0001/(2.60*2.600)=225.467kPaeyk-Vdxk(FMGk24.000/(1200.000*338.OOO)=-0.016m因IeykBy6=0.433my方向小(ft心PkmaX-y=(FkGk)6*MdxkI/(B*Bx)=(1200.OoO+338.000)/6.760+6*-24.000/(2.64)*2
7、,600)=235.708kPa1.,kmin-y=(HkIk)-6*Mdxk(B*Bx)=(1200.OoO+338.000)/6.760-6*-24.OOO1./(2.60*2.600)=219.322kPa3 .确定基础底面反力设计值Pkmax=(PkBaX_X-Pk)+(Pkaaxj-Pk)+pk=(229.563-227.515)+(235.708-227.515)*227.515=237,756kPayo*Pkmnx1.00*237.756-237.756kPa1.2*fa1.2*240.000-288.OOOkPn偏心荷我作用下地基承毅力满足要求七、涮冲切殴算1 .计算基础底面反
8、力设计值1.I计算X方向基础底面反力设计值ex=Mdy(FG)=-7.500/1500.000+456.300)=-0.004mHexBx6.0=0.43X方向小信心1.ax.x=(F+G)A+6SYdy/(B*By)=(1500.000*456.300)/6.760*67.500/(2.6O2.600)=291.954kPaPein-X=(F+G)/A-6IJMyI/(B*By)=1500.000-456.300)/6.760-6-7.500!/(2.6O2.600)=286.833kPa1.2计算y方向基础底面反力设计值ey=MJx(F+C)=-30.000/(1500.00Q+456.3
9、00)=-0.015m因cyWBy/6=0.433y方向小偏心Pnax_y-FG)/A6Mdx/(B*Bx)=(1500.000-156.300)/6.760-6-30.OOO2.60*2.600)=299.635kPaPMin.y=(F+G)A-6*1.M=279.152kPa1.3因YdK0Mdy0PBaX=PmaX_x+Ptnax_y-(F+A二291.954+299.635(1500.OOOM56.300)/6.760=302.195kPa1.1计篇地艇净反力极Pjnax=P三-GA=302.195-456.300/6.760=234.695kPaPjmoxx=Pmax_x-G/A=2
10、91.954456.300/6.760=224.454kPaPjmax_y=hnax_y-G/A=299.635-456.300/6.760=232.!35kPa2 .骁算柱边冲切YH=h1=0.500YB=bc=O.5O0m,Y1.=hc=O.500bYB1.-B1.=1.3O0m,YB2-B2=1.300m,Y1.1=1=1.300m,Y1.2=2=J.300mYHo=YH-as=0.460n2. 1因(YH800)hp=1.03. 2X方向柱对基础的冲切脸算X冲切位比斜极面上边长bt=YB=O.50OmX冲切位置斜蔽面下边长bh=YB2*YHo=1.420mX冲切不利位置=bt+bb)2
11、=(0.500+1.420)/2=0.960mX冲切面积1x-nax(Y1.1.-V1.2-YHo)*(YB2YHo)(Y1.1Y1./2YHo,(Y1.2-Y1.2-YHo)(YB*2*Y1.1.o)(Y1.2-Y1.2-Y1.1.o=max(1.300-0.500/2-0.-160)(0.500+2*0.-160)+(1.300-0.500/2-0.160,(1.300-0.500/2-0.460)*(0,500+2*0.460)+(1.300-0.500/2-0.460)H11ax(1.186,1.186)=1.186X冲切板而上的地展净反力设计值F1.x=A1.xPjmax=1.186
12、*231.695=278.325kNoF1.x-1.00*278.325-278.32kNo0,MdyO此基础为双向受弯2 .计算IT截面弯矩因exBx6=0.433mX方向小儡心a=(B-bc)2=(2.600-0.500)/2=1.050bPj1.=(Bx-a)*(Pinax_x-Pmin_x)/Bx)+Pmin_x-G/A=(2.6001.050)*(291.954286.833)/2.600)*286.833456.300/6.760=222.386kPa因eyBy6=0.433my方向小儡心a=(By-hc)2=600-0,500)/2=1.050Pj2=(B-a)*(Pmax_y-
13、Pminy)/By)*Pmin_y-C/=(2,600-1.050)*(299.635-279.152)/2.600)+279.152-456.300/6.760=223.863kPaBx=I.024By=1.024M1.1.=I/48*x*(Bx-bc*(2*By+hc(PjI+Pjmaxx)=1/48*1.02-1*600-0.500*(2*2.600-0.500)*(222.386+224.454)=239.64kN*nMHJ-48*y*(By-hc*(2Btbc)*(PJ2+PjBaxy)=1/48!.024*600-0.500*(2*2.6000.500)(223.863+232.1
14、35)=244.55kN*m十一、计算配筋10.1计算sxAsx_1.=o*M1._1/(0.9*(H-as)*fy)=1.00*239.61*1/(0.9*(500.000-10.OOo)*360)=1607.9msx1.-sx-1.-1607.nAsx=Asx1.By=1607.9/2.600=6111mAsx=maxAsx,pmin*f1*1000)=max(618.0.150%*500*1000)二750三选择钢筋12S150,实配面枳为754DVm.10.2计算AsyAsy_1.=oMII-1.(0.9(H-as)*fy)=1.002I4.55*1/(0.9*(500.00040.000)*360)=1640.SaAsy1.=Asy_1.=16-10.8mASy=ASyBx=1640.8/2.600-631mmAsy-max(sy,PminWMOOO)=InaX631,O.15(X*5OO*1(K)O)=75(选择钢筋1黑150,实配面枳为754mDu