1、恒载楼面面层 1.20.0220=0.48 kN/板自重 1.20.125=3 kN/板底抹灰 1.20.01517=0.306 kN/恒载合计 g=0.48+3+0.306=3.786 kN/楼面活荷载 q=1.35=6.5 kN/合计 g+q=10.286 kN/3、内力计算 4、配筋计算取。截面1B2C在平面上的部位M(kNm)5.8684.614.8624.8620.8=3.894.8623.890.1090.0850.0900.0720.1150.0890.0950.075395306324257选用钢筋812581508175实配As(mm2)402335287说明:轴线间中间跨中
2、及中间支座弯矩考虑推力的有利影响,弯矩可减少20。5、配筋示意图见附图。四、次梁的计算次梁按塑性内力重分布方法计算。次梁升入墙中120mm,各跨计算跨度为取边跨边跨与中跨计算跨度相差不超过10%,故按等跨连续梁计算。2、荷载计算板传来恒载 3.7863=11.358 kN/m,此处边跨板传向次梁的荷载均按中跨板跨度计算次梁自重 1.20.25(0.55-0.1) 25=3.375 kN/m次梁侧面抹灰 1.2217=0.275 kN/m恒载合计 g=11.358+3.375+0.275=15.008 kN/m板传来活载 q=6.53=19.5 kN/m,此处边跨板传向次梁的荷载均按中跨板跨度计
3、算合计 g+q=34.508 kN/m4、次梁正截面承载力计算次梁按T形截面计算抗弯承载力,因次梁边跨比中跨跨度小,判别T形截面类型时,选择边跨进行比较,即翼缘计算宽度取,按梁最小净距考虑,两者取小值,即。判别各跨跨中截面类型:因此,各跨跨中截面均属于第一类T形截面。次梁正截面承载力计算以及配筋计算见下表,表中。106.44396.28384.24884.248b或bf(mm)20002502200或0.0210.1510.0150.1320.1650.143696679549587218+116218+1163167106035、次梁斜截面承载力计算边支座第一内支座(左)第一内支座(右)中间
4、支座V(kN)78.747129.405107.838(kN)30999.138箍筋直径、肢数双肢657构造配筋255886实配箍筋间距150=250150配筋率验算:,满足要求。6、次梁的配筋示意图见附图五、主梁的计算主梁按弹性理论计算,柱或墙作为主梁的铰支座。主梁伸入墙体370mm。各跨计算跨度为各跨计算跨度相差不超过10%,按等跨连续梁计算。次梁传来荷载(以次梁中跨跨度计算) 15.0086.6=99.053 kN主梁自重(折成集中荷载并以跨中跨度计算) 1.20.35(0.75-0.1) 325=20.475 kN主梁侧面抹灰 1.217=1.193 kN恒载合计G=60.032+20
5、.475+1.193=120.721 kN次梁传来活荷载(以次梁中跨跨度计算)Q=19.56.6=128.7 kN合计G+Q=249.421 kN项次荷载简图110.96682.341-114.284-75.953139.17620.4320.000-75.676-5.297130.91915.13513.918-56.000-60.540113.429102.9199.8389.046-131.676-40.865108.216-121.838146.135138.486136.39340.865-80.973120.38780.216115.784-116.540-101.405-45.4
6、05111.341110.486-20.432143.351-136.973-65.838118.30087.784内力组合250.142102.774-189.960-55.520-119.581213.26097.476124.883-170.284-136.493-99.149224.394185.26092.179120.012-245.960-116.818-104.446190.557-155.149-197.791257.10141.477220.828-174.825247.358123.206-195.257-35.088231.353162.558198.125-230.8
7、25-177.358-159.690222.306192.82861.909254.317-251.257-96.385-180.122229.265170.125-236.122-156.926最不利荷载组合弯矩(kN40.924-79.79766.879-53.84253.842-66.87979.797-40.92451.480-77.22016.345-4.2470.901-9.52463.449-65.25112.870-2.57441.956-86.74479.923-48.7778.623-1.673-6.95050.579-78.12178.121-50.5796.95054.054-74.6463.47560.875-67.825102.96020.721-20.72144.530