箱涵結(jié)構(gòu)計(jì)算書(shū)

箱涵結(jié)構(gòu)計(jì)算書(shū)箱涵結(jié)構(gòu)計(jì)算書(shū)--#-=885.6kN>YV=1.0X575.98kN=575.98kN僅需按構(gòu)造設(shè)置抗剪鋼筋。0d左、右側(cè)墻(B-A、C-D)鋼筋按左右對(duì)稱(chēng)，用最不利荷載計(jì)算。(1)跨中l(wèi)=11.5m,h=1.0m,a=0.06m,h=0.94m。00d711.37575.98=1.235md711.37575.98=1.235m.i'bh.i'bh2i'1.02i==-1212=0.28871。=1。=11.5=0.2887=39.83>17.5由《公路鋼筋混凝土及預(yù)應(yīng)力混凝土橋涵設(shè)計(jì)規(guī)范》第5.3.10條…卄=°."需f。，取€1=】.。0L15-0.。1h罟—o,取L。n=1+丄20.94€1€2n=1+丄20.94€1€2=1+晶9繪X2x1.0x1.0=1.072-0「丿由《公路鋼筋混凝土及預(yù)應(yīng)力混凝土橋涵設(shè)計(jì)規(guī)范》第5.3.5條1400e…h(huán)e=hne+-a=02E"-0.06=1.764mxYNe=fbx(h-—)0dcd02x1.0X575.98X103X1764=11.5X1000XXX(940—2解得x=100mmVgh=0.56X940=526.4mm為大偏心受壓構(gòu)件。b0afbx-yN11.5x1000x100-1.0x575.98x103A=J04==2050mm2sf280sd按構(gòu)造配筋用018@100mm,實(shí)際A=2543mm2s100A<=100A<=Sbh0100x25431000x940=0.27>0.2滿(mǎn)足《公路鋼筋混凝土及預(yù)應(yīng)力混凝土橋涵設(shè)計(jì)規(guī)范》第9.1.12條的規(guī)定。根據(jù)《公路鋼筋混凝土及預(yù)應(yīng)力混凝土橋涵設(shè)計(jì)規(guī)范》第5.2.9條：0?51X1叫fkbh0=0?51X10-X厲X1000X940

=2397kN>YV=1.0X71.52kN=71.52kN抗剪截面尺寸符合規(guī)定。0d0.5X10-3afbh=0.5X10-3X1.0X1.23X1000X9402td0=578.1kN>YV=1.0X71.52kN=71.52kN僅需按構(gòu)造設(shè)置抗剪鋼筋。0d(2)節(jié)點(diǎn)l=11.5m,h=1.5m,a=0.06m,h=1.44m。00d1197.86575.98=2.08m1212=0.433l11.5d1197.86575.98=2.08m1212=0.433l11.5o=-i0.433=26.56>17.5由《公路鋼筋混凝土及預(yù)應(yīng)力混凝土橋涵設(shè)計(jì)規(guī)范》第5.3.10條=°."208取€1=】.00L15-0.。1h―當(dāng)―0,取L。=1+丄?「［1400=1+丄?「［1400e…h(huán),2€€=1+⑷x(11.5'121400x2.08…1.5丿2x1.0x1.0=1.029由《公路鋼筋混凝土及預(yù)應(yīng)力混凝土橋涵設(shè)計(jì)規(guī)范》第5.3.5條e=hne+-a=e=hne+-a=02xYNe=fbx(h-—)0dcd02x1.0X575.98X103X2830=11.5X1000XXX(1440—2解得x=104mmVgh=0.56X1440=806mm,為大偏心受壓構(gòu)件。b0A—/bx-YNSfsd=2214mm211.5x1000x104-A—/bx-YNSfsd=2214mm2280用e20@100mm，實(shí)際A=3140mm2S100A<=100A<=Sbh0100x31401000x1440=0.218>0.2滿(mǎn)足《公路鋼筋混凝土及預(yù)應(yīng)力混凝土橋涵設(shè)計(jì)規(guī)范》第9.1.12條的規(guī)定。根據(jù)《公路鋼筋混凝土及預(yù)應(yīng)力混凝土橋涵設(shè)計(jì)規(guī)范》第5.2.9條：bh=0.51X10-3X叮25X1000X14400=3672kN>YV=1.0X761.55kN=761.55kN抗剪截面尺寸符合規(guī)定。0d0.5X10-3afbh=0.5X10-3X1.0X1.23X1000X14402td0=885.6kN>YV=1.0X761.55kN=761.55kN僅需按構(gòu)造設(shè)置抗剪鋼筋。0d(五)基底應(yīng)力驗(yàn)算1．箱涵自重產(chǎn)生應(yīng)力p=€V=25x(1.0xlOx2,10.5xl.Ox2,0.5x0.5x2)一屈75kN/m箱—~L—帀.涵頂土重產(chǎn)生應(yīng)力P=YH=20.2X3.6=72.72kN/m2土1箱涵內(nèi)水重產(chǎn)生應(yīng)力,€V10x8x10.5?“/P=—=84kN/m2水L10汽車(chē)活載產(chǎn)生應(yīng)力由圖1-73w=q-eh2=10.33-3/102X4.37X12.52=-10.15kN/m1車(chē)L2車(chē)p3w=q+eh2=10.33+3/102X4.36X12.52=30.76kN/m2車(chē)L2車(chē)pp=0+30.76x=0+30.76x102=153.6kN偏心距e=10/2-10/3=1.67m單位長(zhǎng)度豎向力“=P“L+PL+單位長(zhǎng)度豎向力“=P“L+PL+箱土PL+P=1037.5+727.2+840+153.6水活=2758.3kNM=PXe=153.6X1.67=256.5kN?m基底應(yīng)