实用文案
3 1.0 1.3 2 1.0 1.3 1 1.0 1.3 风荷载作用下结构的计算简图:
标准文档
11.25 1.035 0.55 11.88 8.79 7.65 1.000 0.55 11.88 8.49 4.05 1.000 0.55 12.62 9.02
图2-8
实用文案
§2.6内力计算:
2.6.1.恒荷载作用下的内力计算:(采用弯矩二次分配) (1) 各节点分配系数:
对称结构 (分配系数之和=1)
5层 A=D μ下柱=6.33/(6.33+20.07)=0.240
μ右梁=20.07/(6.33+20.07)=0.760 B μ左梁=20.07/(20.07+6.33+11.11)=0.535 μ右梁=11.11/(20.07+6.33+11.11)=0.296 μ下柱=6.33/(20.07+6.33+11.11)=0.169
4-2层 A μ下柱=6.33/(6.33+6.33+20.07)=0.193 μ上柱=6.33/(6.33+6.33+20.07)=0.193
μ右梁=20.07/(6.33+6.33+20.07)=0.613 B μ左梁=20.07/(20.07+6.33+6.33+11.11)=0.458 μ右梁=11.11/(20.07+6.33+6.33+11.11)=0.253 μ下柱=μ上柱=6.33/(20.07+6.33+6.33+11.11)=0.144
1层 A μ上柱=6.33/(6.33+4.95+20.07)=0.202
μ下柱=4.95/(6.33+4.95+20.07)=0.158
μ右梁=20.07/(6.33+4.95+20.07)=0.640 B μ上柱=6.33/(6.33+4.95+20.07+11.11)=0.149
μ下柱=4.95/(6.33+4.95+20.07+11.11)=0.117 μ左梁=20.07/(6.33+4.95+20.07+11.11)=0.473
μ右梁=11.11/(6.33+4.95+20.07+11.11)=0.262 (2) 固端弯矩计算简图 荷载的等效:
标准文档
实用文案
图2-9
① 屋面层
等效均布荷载:?1?0.5?3.3/5.7?0.289
23g'5边?g5AB1?(1?2?1??1)g5AB2
23 ?4.43?(1?2?0.289?0.289)?15.62
?4.43?13.39?17.82kN/m
g'5中?g5BC1?5/8g5BC2
?2.7?5/8?11.36?9.8kN/m 各杆的固端弯矩为:
'M5AB??M5BA?1/12?g5?l2??1/12?17.82?5.72??48.25kN?m 'MCB?M5BC??1/12?g5?l2??1/12?9.8?2.42??4.70kN?m
2 中间层 ○
23g'?gAB1?(1?2?1??1)gAB2
23 ?14.71?(1?2?0.289?0.289)?12.87
?14.71?11.03?25.74kN/m
g'中?gBC1?5/8gBC2
?2.7?5/8?9.36?8.55kN/m
标准文档
实用文案
'MAB??1/12?g5?l2??1/12?25.74?5.72??69.69kN?m
MBA?1/12?g'?l2?1/12?25.74?5.72??69.69kN?m
'MBC?MCB??1/12?g5?l2??1/12?8.55?2.42??4.10kN?m
(3)恒荷载作用下的力矩二次分配见表
标准文档
实用文案
表2-14
(4)各梁跨中弯矩最大值计算及梁端剪力计算简图如下
标准文档