【毕业设计】现浇钢筋混凝土单向板肋梁楼盖设计

现浇钢筋混凝土单向板肋梁楼盖设计目录摘要.................................................................................3引言.................................................................................4任务与分析.............................................................................5现浇钢筋混凝土单向板肋梁楼盖设计........................................................61料............................................................................62置...................................................................63计...........................................................................103.1荷载...........................................................................103.2计算简图.......................................................................113.3弯矩计算值.....................................................................123.4正截面受弯承载力计算...........................................................124.次梁设计............................................................................144.1荷载设计值.....................................................................154.2计算简图.......................................................................154.3内力计算.......................................................................164.4承载力计算.....................................................................164.4.1正截面受弯承载力.............................................................16弯矩、剪力包络图.............................................................235.4承载力计算.....................................................................265.4.1正面受弯承载力...............................................................265.4.2斜截面受剪承载力.............................................................27结论................................................................................19致谢................................................................................20参考文献..............................................................................21摘要计完成了板的配筋和次梁的配筋设计。页引言从本阶段设计起正式进入建筑技术设计阶段表述是关系到建筑物的使用寿命及业主的切身利益。本设计说明书的目的就是将建筑概念设计阶段得出的总体概貌反映到具体的施工图纸上。本说明书的读者定位于建造师,需要对本说明书及图纸进行一个彻底的分析,、荷载楼面水泥砂浆面层厚20mm(γ=20kN/m2);楼面可变荷载标准值q=5kN/m2、梁、板均用15mm=17kN/m32C30—HPB235主梁、次梁受力钢筋采用HRB335级钢筋3、板伸入墙内120mm次梁及主梁伸入墙内240mmb×h=400mm×400mm4、题号L1mL2m可变荷载618.024.85kN/m226m4.96m2m2ol/1ol=4.96/2=2.48页计。按h2000/40=50mmh80mmh=80mm。次梁截面高度应满足h=ol/18ol/12=4960/184960/12=276414mm。考虑到h=400mm。截面宽度取b=200mm主梁截面高度应满足h=ol/14ol/8=6000/156000/10=429750mm。取h=700mm截面宽度为b=300mm混凝土柱400400ABCD120120W1B1W2B2W4B4W5B5W6B6W3B3L2L1W1B1W2B2W4B4W5B5240240W1B1W2B2W3B3W2B2W1B1200X400300X7004960496049604960496018000600060006000200020002000200020002000200020002000×25=2kN/2m20mm厚楼面水泥砂浆面层0.02×20=0.4kN/2m15mm板底混合砂浆抹灰0.015×17=0.255kN/2m小计2.655kN/2m板的可变标准荷载值5kN/2m永久荷载分项系数取1.24.0kN/2m荷载分项系数应取1.3。于是板的永久荷载设计值g=2.655×1.2=3.186kN/2m可变荷载设计值q=5×1.3=6.5kN/2m荷载总设计值g+q=9.686kN/2m3.2计算简图次梁截面为200mm×400mm100mm上的支承长度为120mm边跨ol=nl+h/2=2000-100-120+80/2=1820mm1.025nl=1824mmol=1820mm中间跨ol=nl=2000-200=1800mm31221ABCCBA1820180018001800楼盖板的计算简图1820g+q=9.686kN/m^计算简图如图所示3.3弯矩计算值由表11-1ma1/11-1/111/16-1/14。故1M=-BM=g+q201l/11=9.686×282.1/11=2.92kN·mCM=-g+q201l/14=-=9.686×282.1/14=-2.24kN·m3M=2M=g+q201l/16==9.686×28.1/16=1.96kN·mCM和2M应乘以0.8CM=0.8×-2.24=-1.79kN·m2M=0.8×1.96=1.57kN·m3.4正截面受弯承载力计算C30c=15mm。板厚80mmoh=80-20=60mmb=1000mm。C301a=1.0cf=14.3kN/2mHPB235yf=210N/2m。板配筋计算的过程于下表。楼面板的配筋计算·m2.92-2.921.96-2.24sa=M/1acfb20h0.0560.0560.0380.043=1-s2a-10.0580.0580.0390.044轴线2mmsA=boh1acf/yf238.6238.6158.3162.42mmΦ8@160sA=314.0Φ8@160sA=314.0Φ6/8@160sA=246.0Φ6/8@160sA=246.0轴线2mmsA=boh1acf/yf238.6238.6158.3162.42mmΦ8@160sA=314.0Φ8@160sA=314.0Φ6/8@160sA=246.0Φ6/8@160sA=246.0*2、3和支座截面的弯矩设计值都可折减20%。为了方近似对钢筋面积乘以0.8.0.35sA/bh=246/1000×80=0.308%0.45tf/yf=0.45×1.43/210=0.306%同时大于0.2%次梁设计主梁的可变和在不考虑梁从属面积的荷载折减。×2.0=5.31kN/2m25×0.20.4-0.08=1.6kN/2m次梁20mm17