Click to edit Master title style,Click to edit Master text styles,Second level,Third level,Fourth level,Fifth level,*,Click to edit Master title style,Click to edit Master text styles,Second level,Third level,Fourth level,Fifth level,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,Click to edit Master title style,Click to edit Master text styles,Second level,Third level,Fourth level,Fifth level,*,Click to edit Master title style,Click to edit Master text styles,Second level,Third level,Fourth level,Fifth level,*,Textmasterformate durch Klicken bearbeiten,Zweite Ebene,Dritte Ebene,Vierte Ebene,Fnfte Ebene,Klicken Sie,um das Titelformat zu bearbeiten,Page,*,Textmasterformate durch Klicken bearbeiten,Zweite Ebene,Dritte Ebene,Vierte Ebene,Fnfte Ebene,Klicken Sie,um das Titelformat zu bearbeiten,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,混凝土结构作业,一 楼层板,主要步骤:,(,1,)板梁的截面尺寸的确定,(,2,)板的设计,(,3,)次梁的设计,混凝土结构作业一 楼层板,1,混凝土结构-楼板设计作业(自制)课件,2,设计资料:,(,1,)楼层面构造做法:面层使用水磨石,,12mm,厚的底板纸筋抹灰。,(,2,)可变荷载:其可变荷载为,2.0KN/m,。,(,3,)永久荷载分项系数为,1.2,,可变荷载分项系数为,1.4,(由于楼面荷载,4KN/m,)。,(,4,)材料选用:,混凝土 采用,C25,(,f,c,=,11.9N/m,f,t,=1.27N/m),。,钢筋 梁中受力主筋采用,HRB335,级钢筋(,fy=300N/mm,),,其余采用,HPB235,级钢筋(,fy=210N/mm,)。,设计资料:,3,【,解,】,(,1,)板 梁的截面尺寸的确定,板按考虑塑性内力重分布方法计算。,考虑刚度要求,板厚,h,(,1/351/40)2400=6068.57mm,。,考虑名用建筑楼层板最小板厚为,60mm,,板厚确定为,60mm,。,次梁截面高度根据一般要求:,h=,(,1/121/18)L,。,=1/121/18)4800=266.67400mm,,,取,bh=200mm300mm,。,主梁截面高度根据一般要求:,h=,(,1/81/14)L,。,=1/81/14)7200=514900mm,,,取,bh=300mm600mm,。,【解】(1)板 梁的截面尺寸的确定,4,(,2,)板的设计,荷载计算,水磨石面层,0.65KN/m,60mm,厚钢筋混凝土板,250.06=1.5KN/m,12mm,厚板底抹灰,160.012=0.2KN/m,恒荷载标准值,g,k,=2.35KN/m,恒荷载设计值,g=1.22.35=2.82KN/m,可变荷载设计值,q=1.42.0 =2.8KN/m,合计,5.62KN/m,既每米板宽,g,q=5.62KN/m,(2)板的设计,5,内力计算,计算跨度:,边跨,L1=Ln=2400mm,200mm=2.2m,L2=Ln=2000mm,200mm=1.8m,中间跨,L3=Ln=2.2m,内力计算,6,截面,边跨跨中,离端第二支座,离端第二跨中跨中,中间支座,弯矩系数,a,114,-1/11,1/16,1/14,1/145.622.2=1.94(,左),1/145.621.8=1.30(,右),1/115.622.2=,2.49,(左),1/115.621.8=,1.66,(右),1/165.8122.2=1.70,1/145.622.2=,1.94,连续板各截面弯矩计算,截面边跨跨中离端第二支座离端第二跨中跨中中间支座弯矩系数a1,7,板的截面配筋计算,取,1m,宽板带作为计算单元,b=1000mm,,,h=60mm,,,h,0,=60-20=40mm,板带位置,中区板带,板带截面部位,边跨跨中,离端第二支座,离端第二跨跨中,中间支座,M(KN/m),1.940.8=1.55,1.300.8=1.04,-2.470.8=-1.98,1.660.8=1.33,1.760.8=1.41,-1.940.8=-1.55,0.081 0.055,0.104 0.070,0.071,0.081,0.085 0.057,0.110 0.073,0.074,0.085,193 129,249 165,168,193,选用钢筋,6/8200,6200,8200,6/8200,6/8200,6/8200,实配钢筋面积,(,mm),196 141,251 196,196,196,板的截面配筋计算板带位置 中区板带板带截面部位边跨跨中离端,8,(,a,)分布钢筋:按规定选用,8250,(,b,)板边构造钢筋:按规定选用,8200,,设置板四周的上部,(a)分布钢筋:按规定选用8250,9,(3)次梁的设计,荷载计算,恒荷载设计值,由板传来,2.822.4=6.77KN/m,梁自重,1.20.2(0.3-0.06)25=1.44,KN/m,梁测抹灰,1.20.,012,(0.,3-,0.06),216,=,0.111,KN/m,g,k,=,8.32,KN/m,可变荷载设计值由板传来 q=1.42.02.4 =6.72KN/m,合计 gq=15.04KN/m,(3)次梁的设计,10,内力计算,计算跨度,边跨,L,01,=L,n1,=4.8-0.3=4.5m,中跨,L,02,=L,n1,=4.8-0.3=4.5m,内力计算,11,截面,边跨跨中,离端第二支座,离端第二跨中跨中,中间支座,弯矩系数,a,114,-1/11,1/16,1/14,1/1415.044.5=21.75,1/1115.044.5=,27.69,1/1615.044.5=19.04,1/1415.694.5=,21.75,次梁弯矩计算,截面边跨跨中离端第二支座离端第二跨中跨中中间支座弯矩系数a1,12,次梁剪力计算,截面,端支座右侧,离端第二支座左,离端第二支座右,中间支座左 右,剪力系数,v,0.50,0.55,0.55,0.55,(KNm),0.5015.044.5=33.84,0.5515.044.5=37.22,0.5515.044.5=37.22,0.5515.044.5=37.22,次梁剪力计算截面端支座右侧离端第二支座左离端第二支座右中间支,13,截面承载力计算,次梁跨中按,T,形截面计算,其翼缘宽度为:,边跨,=L03=134500=1500,b+S0=200+2200=2400mm,取,=1500mm,中间跨,=13=4750=1580mm,梁高,h=300mm,,,h0=300-35=265mm,,或,h0=240mm,翼缘高,=60mm,判别,T,形截面类型,=1.011.9150060,(,265,602,),=,=251.7KNm,22.69KNm,(边跨跨中),19.86KNm,(离端第二跨跨中),故各跨中截面属于第,1,类,T,形截面,支座截面按矩形截面计算,离端第二支座按布置两排纵向钢筋考虑,取,h,0,=300,60=240mm,,其它中间支座按布置一排纵向钢筋考虑,h,0,=265mm,截面承载力计算,14,表次梁的正截面计算,截面,边跨跨中,离端第二支座,离端第二跨跨中,中间支座,M,(,KN/m,),21.75,27.69,19.04,21.75,1.011.91500265=,1.011.9200240=,1.011.91500265=,1.011.91500265=,0.017,0.202,0.015,0.017,0.017,0.228,0.015,0.017,268,479,237,268,选用钢筋,2 14,3 14,2 14,2 14,实配钢筋面积,(,mm),308,461,308,308,表次梁的正截面计算截面边跨跨中离端第二支座离端第二跨跨中中间,15,次梁斜截面计算,截面,端支座右侧,离端第二支座左,离端第二支座右,中间支座,V,(,kn,),33.84,37.22,37.22,37.22,0.251.011.9200265=157.7,V,0.251.011.9200240=142.8,V,142.8V,142.8V,0.71.27200265=47.1,V,0.71.27200240=42.7,V,42.7V,42.7V,选用钢筋,28,28,28,28,0.44%,0.8%,0.4%,0.44%,按构造配置,按构造配置,按构造配置,按构造配置,实际箍筋间距,(,mm,),200,200,200,200,次梁斜截面计算截面端支座右侧离端第二支座左离端第二支座右中间,16,二 屋面板,主要步骤:,(,1,)板梁的截面尺寸的确定,(,2,)板的设计,(,3,)次梁的设计,二 屋面板,17,设计资料:,(,1,)屋面板构造做法:,25mm,厚水泥砂浆隔热板,普通砖(,12,快,m,)隔热层支座,防水层,,60mm,厚的钢筋混凝土板,,12mm,厚板底纸筋抹灰,(,2,)可变荷载:其可变荷载为,2.0KN/m,。,(,3,)永久荷载分项系数为,1.2,,可变荷载分项系数为,1.4,(由于楼面荷载,4KN/m,)。,(,4,)材料选用:,混凝土 采用,C25,(,f,c,=,11.9N/m,f,t,=1.27N/m),。,钢筋 梁中受力主筋采用,HRB335,级钢筋(,fy=300N/mm,),,其余采用,HPB235,级钢筋(,fy=210N/mm,)。,设计资料:,18,【,解,】,(,1,)板 梁的截面尺寸的确定,板按考虑塑性内力重分布方法计算。,考虑刚度要求,板厚,h,(,1/351/40)2400=6068.57mm,。,考虑名用建筑楼层板最小板厚为,60mm,,板厚确定为,60mm,。,次梁截面高度根据一般要求:,h=,(,1/121/18)L,。,=1/121/18)4800=266.67400mm,,,取,bh=200mm300mm,。,主梁截面高度根据一般要求:,h=,(,1/81/14)L,。,=1/81/14)7200=514900mm,,,取,bh=300mm600mm,。,【解】(1)板 梁的截面尺寸的确定,19,(,2,)板的设计,荷载计算,永久荷载标准值,25mm,厚水泥砂浆隔热板:,0.02520=0.5KN/m,普通砖(,12,快,m,)隔热层支座:,180.240.1150.05312=0.32KN/m,防水层,0.3KN/m,60mm,厚钢筋混凝土板,250.08=2KN/m,12mm,厚板底纸筋抹灰,180.02=0.36KN/m,恒荷载标准值,gk=2.51KN/m,活荷载设计值,g=1.22.51=3.012KN/m,可变荷载设计值,q=1.42.0 =2.8KN/m,合计,6.18KN/m,既每米板宽,g,q=6.18KN/m,(