《桥面板计算(共7页).docx》由会员分享,可在线阅读,更多相关《桥面板计算(共7页).docx(7页珍藏版)》请在taowenge.com淘文阁网|工程机械CAD图纸|机械工程制图|CAD装配图下载|SolidWorks_CaTia_CAD_UG_PROE_设计图分享下载上搜索。
1、精选优质文档-倾情为你奉上桥面板计算一、 中板计算箱梁顶板跨中厚度为0.3m,两腹板间板净距为5m,腹板宽度为0.5m,箱梁腹板处承托尺寸为0.6m0.2m。1恒载内力取1m板宽计算将承托面积摊于桥面板上,则计算板厚t=30+6020/500=32.4cm;桥面板每延米自重为:g1=0.324126=8.424kN/m;每延米桥面铺装荷载为:g2=0.1123=2.3k N/m;所以:g= g1 +g2=8.424+2.3=10.724 N/m;(1) 计算恒载弯矩弯矩计算跨径L=minL0+t, L0+t,=min5+0.3,5+0.5=5.3m;故 Msg=1/8gL2=1/810.724
2、5.32=37.655kN.m。(2) 计算恒载剪力剪力计算跨径L= L0=5.0m;故 Qsg=1/2gL=1/210.7245.0=26.81kN。2. 活载内力取1m板宽计算采用城A级车辆荷载,车轮着地宽度为b0a0=0.60.25m;平行于板方向的分布宽度:b=b0+2h=0.6+20.1=0.8m。当单个车轮作用在跨中桥面板时,垂直板跨径方向的荷载分布宽度为:a= a0+2h+L/3=0.25+20.1+5.3/3=2.217m1.2,且a3.6m,故2、3轮的荷载分布宽度发生重叠。则a= a0+2h+L/3+d=0.25+20.1+5.3/3+1.2=3.417m M0=161.0
3、96 kN.m 抗弯承载力满足要求。b. 抗剪承载力验算 0.5110-3fcu,kbh0=0.5110-31.0501000543=1958.191kNVu V0=274.606 kN.m 截面尺寸满足要求。 0.510-32ftdbh0=0.510-31.01.831000543=496.845kNVu V0=274.606 kN.m 仅需要按构造配置箍筋。c. 裂缝宽度验算ss=Ms0.87Ash0=70.5241060.872545453=70.312MPaC1=1.0,C2=1+0.5 Ms / Ml=1+0.570.524/51.599=1.683,C3=1.15;=As/b h0
4、=2545/(1000543)=0.004680.006,取=0.006Wfk=C1C2C3ssEs(30+d0.28+10)=1.01.6831.1578.1252105(30+180.28+100.006)=0.1mm M0=161.096 kN.m 满足要求。b. 抗剪承载力验算 0.5110-3fcu,kbh0=0.5110-31.0501000260=937.624kNVu V0=274.606 kN 截面尺寸满足要求。 1.25 0.510-32ftdbh0=0.510-31.01.831000260=297.375kNVu V0=274.606 kN 仅需要按构造配置箍筋。c.
5、裂缝宽度验算ss=Ms0.87Ash0=70.5241060.872545260=122.506MPaC1=1.0,C2=1+0.5 Ms / Ml=1+0.570.524/51.599=1.683,C3=1.15;=As/b h0=2545/(1000260)=0.00980.006,且0.02,取=0.0098Wfk=C1C2C3ssEs(30+d0.28+10)=1.01.6831.15122.5062105(30+180.28+100.0098)=0.15mm M0=66.626kN.m 抗弯承载力满足要求。b. 抗剪承载力验算 0.5110-3fcu,kbh0=0.5110-31.0
6、501000710=2560.433kNVu V0=52.959kN 截面尺寸满足要求。 0.510-32ftdbh0=0.510-31.01.831000710=649.65kNVu V0=52.959 kN 仅需要按构造配置箍筋。c. 裂缝宽度验算ss=Ms0.87Ash0=66.6261060.872545710=42.382MPaC1=1.0,C2=1+0.5 Ms / Ml=1+0.538.211/34.264=1.558,C3=1.15;=As/b h0=2545/(1000660)=0.003860.006,取=0.006Wfk=C1C2C3ssEs(30+d0.28+10)=1
7、.01.5581.1542.3822105(30+180.28+100.006)=0.054mm1.2,且a3.6m,a M0=64.9kN.m 抗弯承载力满足要求。b. 抗剪承载力验算 0.5110-3fcu,kbh0=0.5110-31.0501000710=2560.433kNVu V0=72.677kN.m 截面尺寸满足要求。 0.510-32ftdbh0=0.510-31.01.831000710=649.65kNVu V0=72.677 kN.m 仅需要按构造配置箍筋。c. 裂缝宽度验算ss=Ms0.87Ash0=64.91060.872545710=41.284MPaC1=1.0,C2=1+0.5 Ms / Ml=1+0.532.42/26.268=1.617,C3=1.15;=As/b h0=2545/(1000710)=0.003580.006,取=0.006Wfk=C1C2C3ssEs(30+d0.28+10)=1.01.6171.1541.2842105(30+180.28+100.006)=0.039mm0.2mm,满足要求。专心-专注-专业