二次分配法PPT课件

1、13.2 框架结构设计框架结构设计 内力分析内力分析 内力计算内力计算 竖向荷载作用下竖向荷载作用下 弯矩二次分配法弯矩二次分配法 计算例题计算例题3.8 kn/m3.4 kn/m2.8 kn/m右图括号中为梁、右图括号中为梁、柱线刚度的相对值柱线刚度的相对值3600440075005600(4.21)(7.11)(7.63)(10.21)(4.21)(1.79)(4.84)(3.64)abcdefghi(9.53)(12.77)23.2 框架结构设计框架结构设计计算节点弯矩分配系数计算节点弯矩分配系数节点节点 g：gh7.630.6447.634.21gd4.210.3567.634.21节

2、点节点 i：ih10.210.85110.21 1.79if1.790.14910.21 1.79(4.21)(7.11)(7.63)(10.21)(4.21)(1.79)(4.84)(3.64)abcdefghi(9.53)(12.77)33.2 框架结构设计框架结构设计节点节点 h：(4.21)(7.11)(7.63)(10.21)(4.21)(1.79)(4.84)(3.64)abcdefghi(9.53)(12.77)hg7.630.3467.634.21 10.21he4.210.1917.634.21 10.21hi10.210.4637.634.21 10.2143.2 框架结构

3、设计框架结构设计节点节点 d：(4.21)(7.11)(7.63)(10.21)(4.21)(1.79)(4.84)(3.64)abcdefghi(9.53)(12.77)dg4.210.2024.21 9.537.11de9.530.4574.21 9.537.11da7.110.3414.21 9.537.1153.2 框架结构设计框架结构设计节点节点 e：(4.21)(7.11)(7.63)(10.21)(4.21)(1.79)(4.84)(3.64)abcdefghi(9.53)(12.77)ed9.530.3049.534.21 12.774.84eh4.210.1349.534.2

4、1 12.774.84ef12.770.4079.534.21 12.774.84eb4.840.1559.534.21 12.774.8463.2 框架结构设计框架结构设计节点节点 f：(4.21)(7.11)(7.63)(10.21)(4.21)(1.79)(4.84)(3.64)abcdefghi(9.53)(12.77)fi1.790.0981.79 12.773.64fe12.770.7021.79 12.773.64fc3.640.2001.79 12.773.647计算框架梁固端弯矩计算框架梁固端弯矩2fgh2.8 7.5kn m13.13kn m12m 2fhg2.8 7.5k

5、n m13.13kn m12m2fhi2.8 5.6kn m7.32 kn m12m 2fih2.8 5.6kn m7.32 kn m12m3.2 框架结构设计框架结构设计3.8 kn/m3.4 kn/m2.8 kn/m75005600abcdefghi82fde3.8 7.5kn m17.81kn m12m 2fed3.8 7.5kn m17.81kn m12m2fef3.4 5.6kn m8.89 kn m12m 2ffe3.4 5.6kn m8.89 kn m12m3.2 框架结构设计框架结构设计3.8 kn/m3.4 kn/m2.8 kn/m75005600abcdefghi93.2

6、框架结构设计框架结构设计0.2020.3410.4570.3040.1340.1550.4070.7020.2000.098上柱上柱0.346下柱下柱右梁右梁左梁左梁0.3560.644下柱下柱右梁右梁0.8510.149左梁左梁下柱下柱上柱上柱上柱上柱0.1910.463梁端不平衡弯矩及其分配梁端不平衡弯矩及其分配-17.8117.81-8.898.89-13.13-7.3213.137.324.678.466.073.608.14-2.01-1.11-2.69-6.23-1.09-2.71-1.20-1.38-3.63-1.78-6.24-0.874.232.34-1.01-0.56-1.35-3.12-0.551.803.044.07-1.36-0.60-0.69-1.82-3.12-0.89-0.44-0.28-0.51-0.18-0.10-0.231.520.27-0.33-0.20-0.45-0.12-0.05-0.06-0.160.471.670.236.19-6.1915.17-1.81 -13.361.26-1.265.745.74-11.4819.05-1.81-1.4415.80-1.312.50-1.19abcdefihg103.2 框架结构设