6 水平地震作用下框架的内力分析.doc

6、水平地震作用下横向框架的内力分析6 水平地震作用下横向框架的内力分析（以A4D4榀框架为例）6.1 楼层剪力由表4.5.9得水平地震作用下横向框架各楼层剪力如表6.1.1所示。表6.1.1 水平地震作用下横向框架各楼层剪力 单位：kN 层数层间剪力8884.75271438.82461918.42452320.57342648.2532898.47623074.2313178.4906.2 各柱抗侧刚度D由表4.5.7得各柱抗侧刚度如表6.2.1所示。表6.2.1 A4D4榀框架各柱抗侧刚度及楼层总刚度 单位：104KN/m项 目标准层1.14272.659581.2828底层1.77752.382090.59526.3 各层各柱剪力的计算由D值法，各层各柱剪力的计算如表6.3.1所示。表6.3.1 各层各柱剪力的计算 单位：kN层数层间剪力8884.7520.014058 12.4380.032719 28.948 71438.8240.01405820.2270.03271947.077 61918.4240.01405826.9690.03271962.769 52320.5730.01405832.6230.03271975.927 42648.250.01405837.2290.03271986.648 32898.4760.01405840.7470.03271994.835 23074.230.01405843.2180.032719100.586 13178.4900.019620 62.3620.026293 83.572 6.4 各层各柱反弯点高度的计算由D值法，查表得出各层各柱反弯点高度的计算如表6.4.1所示。表6.4.1 各层各柱反弯点高度的计算 层数(位置)8A4(D4)0.62230.300.05000.35B4(C4)0.82970.310000.317A4(D4)0.62230.400.05000.45B4(C4)0.82970.400000.406A4(D4)0.62230.450.05000.50B4(C4)0.82970.450000.455A4(D4)0.62230.450.05000.50B4(C4)0.82970.450000.454A4(D4)0.62230.450.05000.50B4(C4)0.82970.460000.463A4(D4)0.62230.500.05000.55B4(C4)0.82970.500000.502A4(D4)0.62230.540.050-0.020.57B4(C4)0.82970.5000-0.020.481A4(D4)0.81240.700-0.0200.68B4(C4)1.08330.650000.656.5 柱端弯矩的计算，。各层各柱柱端弯矩计算如表6.5.1所示。表6.5.1 水平地震作用下柱端弯矩计算 单位：、层数(位置)8A4(D4)12.4381.260 2.340 15.67229.105B4(C4)28.9481.116 2.484 32.306 71.907 7A4(D4)20.2271.620 1.980 32.768 40.049 B4(C4)47.0771.440 2.160 67.791 101.686 6A4(D4)26.9691.800 1.800 48.544 48.544 B4(C4)62.7691.620 1.980 101.686 124.283 5A4(D4)32.6231.800 1.800 58.721 58.721 B4(C4)75.9271.620 1.980 123.002 150.335 4A4(D4)37.2291.800 1.800 67.012 67.012 B4(C4)86.6481.656 1.944 143.489 168.444 3A4(D4)40.7471.980 1.620 80.679 66.010 B4(C4)94.8351.800 1.800 170.703 170.703 2A4(D4)43.2182.052 1.548 88.683 66.901 B4(C4)100.5861.728 1.872 173.813 188.297 1A4(D4)62.3623.196 1.504 199.309 93.792 B4(C4)83.5723.055 1.645 255.312 137.476 6.6 梁端弯矩的计算由节点平衡条件，式中M、Mbr、Mbl为节点处的梁端的弯矩，Mcu、Mcl为节点处柱上下端弯矩，ibr、ibl为节点处左右梁的线刚度。以各个梁为脱离体，将梁的左右端弯矩之和除以该梁的跨长，便得到梁内的剪力，计算过程如表6.6.1所示。表6.6.1 水平地震作用下梁端弯矩计算 单位： 位置 层号边节点A（D）中间节点B（C）829.10529.105 71.90726.368 45.539 715.67240.04955.721 32.306101.68649.135 84.857 632.76848.54481.312 67.791124.28370.434 121.640 548.54458.721107.265 101.686150.33592.416 159.605 458.72167.012125.733 123.002168.444 106.873 184.573 367.01266.010133.022 143.489170.703 115.214 198.978 280.67966.901147.580 170.703 188.297131.645 227.355 188.68393.792182.475 173.