土木工程毕业设计2 屋盖、楼盖设计

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1、东南大学毕业设计二屋盖、楼盖设计（一）屋盖1．设计资料1）屋面做法：钢筋混凝土现浇板，20mm石灰砂浆抹底，20mm水泥砂浆找平，40～120厚（1%找坡）膨胀珍珠岩保温层，四层作法防水层（一毡二油上铺小石子）2）屋面荷载：均布活荷载标准值2kN/m2(上人屋面)，雪荷载标准值为0.65kN/m23）材料：混凝土强度等级为C30；梁内受力纵筋为HRB335，其余为HPB235钢筋2．屋盖的结构平面布置图3．板的设计（弹性理论）1）荷载计算由于屋面均布活荷载标准值大于屋面雪荷载标准值，故取前者进行计算恒荷载标准值：20厚水泥混凝土找

2、平0.02×20=0.46kN/m240～120厚（1%找坡）膨胀珍珠岩(0.08+0.16)÷2×7=0.546kN/m2-18-东南大学毕业设计四层作法防水层0.36kN/m2100mm厚钢筋混凝土楼板0.1×25=2.56kN/m220mm厚石灰砂浆抹底0.02×17=0.34kN/m2小计4.08kN/m2荷载设计值g=1.2×4.08=4.90kN/m2，q=1.4×2.0=2.8kN/m2q/2=1.4kN/m2，g+q/2=6.3kN/m2，g+q=7.7kN/m22）弯矩计算计算过程见下页表中3）截面设计截面有效高

3、度：假定选用Φ8钢筋，则l01方向跨中截面的h01=80mm；l02方向跨中截面的h02=70mm；支座截面h0=80mm。最小配筋率：因为，故取ρsmin=0.27%，则Asmin=0.27%×1000×100=270mm2截面设计时取用的弯矩设计值：中间跨的跨中截面及中间支座截面减小20%；边跨跨中截面及楼板边缘算起的第二个支座截面处，当lb/l0<1.5时减小20%，当lb/l0=1.5～2.0时减小10%；楼板的角区格不折减。-18-东南大学毕业设计弯矩值计算表ABCDEFGHl01(m)3.93.93.03.03.33.

4、43.93.9l02(m)7.27.27.83.93.93.97.27.2l01/l020.540.540.380.770.850.870.540.54m1(0.0388+0.2×0.0052)×6.3×3.92+(0.0232+0.2×0.0810)×1.4×3.92=4.58(0.0388+0.2×0.0052)×6.3×3.92+(0.0535+0.2×0.0099)×1.4×3.92=5.00(0.0400+0.2×0.0038)×6.3×3.92+(0.0965+0.2×0.0174)×1.4×3.92=3.57(0.0

5、285+0.2×0.0136)×6.3×3.92+(0.0376+0.2×0.0196)×1.4×3.92=2.14(0.0246+0.2×0.0156)×6.3×3.92+(0.0225+0.2×0.0255)×1.4×3.92=2.32(0.0235+0.2×0.0159)×6.3×3.92+(0.0329+0.2×0.0124)×1.4×3.92=2.52(0.0388+0.2×0.0052)×6.3×3.92+(0.0907+0.2×0.0203)×1.4×3.92=5.84(0.0388+0.2×0.0052)×6.3×

6、3.92+(0.0121+0.2×0.0504)×1.4×3.92=4.29m2(0.0052+0.2×0.0388)×6.3×3.92+(0.0810+0.2×0.0232)×1.4×3.92=3.07(0.0052+0.2×0.0388)×6.3×3.92+(0.0099+0.2×0.0535)×1.4×3.92=1.68(0.0038+0.2×0.0400)×6.3×3.92+(0.0174+0.2×0.0965)×1.4×3.92=1.13(0.0136+0.2×0.0285)×6.3×3.92+(0.0196+0.2×0

7、.0376)×1.4×3.92=1.44(0.0156+0.2×0.0246)×6.3×3.92+(0.0255+0.2×0.0225)×1.4×3.92=1.87(0.0159+0.2×0.0235)×6.3×3.92+(0.0124+0.2×0.0329)×1.4×3.92=1.81(0.0052+0.2×0.0388)×6.3×3.92+(0.0203+0.2×0.0907)×1.4×3.92=2.06(0.0052+0.2×0.0388)×6.3×3.92+(0.504+0.2×0.0121)×1.4×3.92=2.37m

8、’1-0.0817×7.7×3.92=-9.57-0.0817×7.7×3.92=-9.57-0.0829×7.7×3.02=-5.74-0.0686×7.7×3.02=-4.75-0.0626×7.7×3.32=-5.25-0.0611×7.7×