1、钢结构计算书框架内力与构件截面计算1设计依据的规范及规定1.1 毕业设计任务书。1.2 国家有关的设计规范及规程。2设计尺寸与标高设计图均以毫米为单位,标高均以米为单位。3钢结构材料3.1钢材:钢材选用Q-345BF,其屈服强度为310KN/mm2 钢材的化学成分和力学性质能符合GB-800-98及有关标准的求。3.2焊接材料:采用E43XX型焊条。3.3普通螺栓应按GB5780-98选购。3.4本工程选用的H型钢选HN5002001016 HM6003001220C型钢选C22070202.54制作与安装4.1钢结构的制作与安装:施工及验收应符合GB50205-98(钢结构工程施工及验收规范
2、)4.2焊缝质量的检验等级:钢梁,钢柱为二级,其于次要构件为三级。4.3所有需要拼接的构件一律要用等强拼接,上,下翼缘和腹板的拼接焊缝位置错开并避免与加劲肋重合。腹板拼接焊缝与它平行的加劲肋至少相距200mm,腹板拼接与上,下翼缘拼接焊缝至少相距200mm.4.4所有构件在制作过程中应力求尺寸及空洞位置的准确性,以利于现场的安装与焊接,设计中凡是未注明的焊缝均为满焊,焊缝高度6mm。2.1均布荷载 屋面:1.3087.2+0.89=10.3 KN /m 楼面:10.247.2+0.89=74.61 KN /m 底层:74.61 KN /m2.2集中荷载 屋面:梁重6.408 KN /m 楼面:
3、H轴:纵梁+墙重+檩条 =6.408+4.86+1.87=13.14 KN /m D轴:纵梁+幕墙+檩条=6.408+16.32+1.87=24.6KN /m 底层:H轴:13.14 KN /m D轴:24.6KN /m2.3水平荷载作用下结构内力与侧移W0: 0.5 KN/m2 s:0.74 z : 1.0风振高度系数:0.746层: F3 = 0.51.41.00.743.63.6/5=1.34KN6层: F3 = 0.51.41.00.743.63.6/4=1.68KN4层: F3 = 0.51.41.00.743.63.6/3=2.24KN3层: F3 = 0.51.41.00.743
4、.63.6/2=3.36KN2层: F2 = 0.51.41.00.743.63.6=6.71 KN1层: F1 = 0.51.41.00.743.6(3.6+3.775)/2=6.87KN图2 框架楼面处集中风荷载值2.4 地震荷载作用下水平结点荷载梁 柱线刚度计算 Ec =2.06105N/mm2.4.1 承重梁线刚度 ic = Ec Ix /l=2.06105 478000104 /7200=13.67103 KNm2.4.2 底层柱线刚度 id = Ec Ix /l=2.06105 1180000104 /5600=43.4103 KNm 2.4.3 标准层柱线刚度 id = Ec I
5、x /l=2.06105 1180000104 /4500=54103 KNm 表1 2-6层D计算: 柱D中柱边柱K=il13.64= 0.50613.62= 0.2532ix542542a = K0.506= 0.2530.253= 0.112 + K2.5062.253D =aiZR6460 KN/m3520 KN/mh2 D = 64603 + 35202 =26420 KN/m 表2 底层D值计算: 柱D中柱边柱K=il13.62= 0.62913.67= 0.3142x43.443.4a =0.5 + K0.5 + 0.63= 0.4290.5 + 0.31= 0.3512 + K
6、2 + 0.632 + 0.31D =aiZR7120 KN/m5820 KN/mh2 D = 71203 + 58202 =33000 KN/m 3、 内力计算及组合3.1水平地震作用下横向框架结构内力计算框架结构内力计算采用D值法,其中D和D取自 横向柱侧移刚度 D值,层间剪力取自地震剪力。具体的柱剪力和弯矩计算过程及结果见下表 横向水平地震作用下框架柱剪力和柱弯矩标准值 柱层次H(m)Vi(KN)Di(KN/m)D(KN/m)D/DiVik(KN)K yiM下(KN.m)M 上(KN.m)边柱63.0425.94502342179.70.048420.611.2560.3622.2639
7、.5753.0784.04502342179.70.048437.951.2560.4146.6867.1743.01082.54502342179.70.048452.391.2560.4570.7386.4433.01321.64502342179.70.048463.971.2560.4688.28103.6323.91519.1332247164590.049575.201.6330.5046.64146.6415.151665.0322513179430.055692.572.1560.55262.20214.53中柱63.0425.9450234534900.118850.601.
8、9160.3959.2092.6053.0784.0450234534900.118893.141.9160.45125.74153.6843.01082.5450234534900.1188128.601.9160.45173.61212.1933.01321.6450234534900.1188157.011.9160.49230.80240.2323.91519.1332247411050.1237187.912.4880.50252.66252.6615.151665.0322513412760.1280213.123.2860.55327.37286.25 梁端弯矩及剪力及柱轴力的计
9、算过程见下表。水平地震作用下横向框架框架的弯矩图梁端剪力图以及柱轴力图如图所示。 地震作用下框架梁端弯矩剪力及柱轴力计算 层次边梁A-C梁C-E边梁E-HL(m)M左(KN.m)M右(KN.m)Vb(KN)L(m)M左(KN.m)M右(KN.m)Vb(KN)L(m)M左(KN.m)M右(KN.m)Vb(KN)66.039.5770.8118.403.921.7923.4311.596.669.1739.5716.4856.089.43117.5234.493.936.1638.8819.246.6114.8089.4330.9446.0133.12162.3349.243.949.8653.6
10、826.556.6158.51133.1244.1936.0174.36183.7859.693.956.4560.7830.066.6179.45174.3653.6126.0234.92280.3185.873.986.1192.7045.856.6273.72234.9277.0716.0361.17377.8423.173.9116.07124.9661.806.6368.95361.17110.62柱 轴 力层次A轴柱(KN)C轴柱(KN)E轴柱(KN)H轴柱(KN)6-18.406.81-4.8916.485-52.8922.06-15.6947.424-102.1344.75-3
11、4.2391.613-188.0074.38-57.78148.222-273.87114.40-89.00222.291-297.04153.04-137.82332.913.2风荷载作用下横向框架内力计算 风荷载作用下仍以抽线作为计算单元,计算框架结构的内力。具体的柱剪力和弯矩计算过程及结果见下表;梁端弯矩、剪力及柱抽力计算过程见下表。 风荷载作用下框架柱剪力和柱弯矩标准值 柱层次H(m)VI(KN)DI(KN/m)D(KN/m)D/DIVik(KN)KyiM下(KN.m)M 上(KN.m)边柱63.04.315057421.7970.14480.621.2560.360.671.1953
12、.08.7415057421.7970.14481.271.2560.411.562.2543.012.915057421.7970.14481.871.2560.452.523.0933.017.0615057421.7970.14482.471.2560.463.414.0023.921.84115128164590.14303.121.6330.506.086.0815.1527.76112168179430.16004.442.1560.5512.5810.29中柱63.04.3150574534900.35521.531.9160.391.792.8053.08.74150574534900.35523.101.9160.454.195.1243.012.9150574534900.