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武汉科技大学本科毕业设计
5.1KN.M29.33KN6.54KN/M47.66KN6.54KN/M47.66KN95.32KN51.95KN6.54KN/M3.19KN/M95.32KN142.98KN51.95KN6.54KN/M3.19KN/M142.98KN190.64KN51.95KN6.54KN/M3.19KN/M190.64KN238.3KN51.95KN6.54KN/M3.19KN/M238.3KN285.96KN51.95KN6.54KN/M3.19KN/M285.96KN333.62KN51.95KN6.54KN/M3.19KN/M333.62KN381.28KN51.95KN3.19KN/M51.95KN3.19KN/M51.95KN3.19KN/M47.66KN51.95KN3.19KN/M47.66KN95.32KN51.95KN3.19KN/M95.32KN142.98KN51.95KN3.19KN/M142.98KN190.64KN51.95KN3.19KN/M190.64KN238.3KN51.95KN3.19KN/M238.3KN285.96KN51.95KN3.19KN/M285.96KN333.62KN51.95KN3.19KN/M333.62KN381.28KN6.54KN/M6.54KN/M6.54KN/M5.1KN.M29.33KN29.33KN5.1KN.M58.66KN58.66KN5.1KN.M87.99KN87.99KN5.1KN.M117.32KN117.32KN5.1KN.M146.65KN146.65KN5.1KN.M175.98KN175.98KN5.1KN.M205.31KN205.31KN5.1KN.M234.64KN29.33KN5.1KN.M58.66KN58.66KN5.1KN.M87.99KN6.54KN/M87.99KN5.1KN.M117.32KN117.32KN5.1KN.M146.65KN6.54KN/M146.65KN5.1KN.M175.98KN175.98KN5.1KN.M205.31KN6.54KN/M6.54KN/M205.31KN5.1KN.M234.64KN6.54KN/M234.64KN381.28KN381.28KN234.64KN6300AB7500C6300D图3.2 活载作用受荷简图
3.3 风荷载
风压标准值计算公式为:w=βμμω
Z
S
Z
0
本地区基本风压为:w0=0.35
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武汉科技大学本科毕业设计
地面粗糙类别为
C
类;风振系数:βZ=1+Hi/H?ξγ/μ
Z
(3.3)
表3.1
层次 H总=30.9m B≈58m H/B≈0.5
查表:脉动影响系数γ=0.40
1 2 3 4 5 6 7 8 Hi(第i层距离室外地面的高度) 4.8 7.8 10.8 13.8 16.8 19.8 22.8 25.8 表3.2
离地面高度(m)z 风压高度系数μZ 结构基本周期:
T?0.25?0.53?10?3?H2/3B4.8 7.8 10.8 13.8 16.8 19.8 22.8 25.8 0.74 0.74 0.74 0.74 0.776 0.836 0.885 0.933 =
0.25?0.53?10?3?28.52/318.7=0.41
(3.4)
ω
0
=0.35?0.62=0.22kN/m2
(3.5)
ω(
0
T2=0.22?0.412=0.04
3.6)
Z
查表得:脉动增大系数ξ=1.17 β
=1+Hi/H?
ξ
γ
/
μ
Z
(3.7)
表3.3
Z βZ ω
k
4.8 7.8 10.8 13.8 16.8 19.8 22.8 25.8 1.13 1.19 1.26 1.34 1.39 1.43 1.47 1.50 Z
=βμ
S
μ
Z
ω
0
(3.8)
∵结构高度H=25.8<30m,故取βZ=1.0, μS=1.3
表 3.4
z 4.8 7.8 10.8 13.8 16.8 19.8 22.8 25.8 - 17 –
武汉科技大学本科毕业设计
ωk 0.38 0.40 0.42 0.45 0.49 0.54 0.59 0.64 转化为集中荷载(受荷面与计算单元同) 8层: FW8K=7.8?(3.0/2+1.5)?0.64=14.98KN 7层: FW7K=7.8?3.0?(0.64+0.59)?2=28.78KN 6层: FW6K=7.8?3.0?(0.59+0.54)?2=26.44KN 5层: FW5K=7.8?3.0?(0.54+0.49)?2=24.1KN 4层: FW4K=7.8?3.0?(0.49+0.45)?2=22KN 3层: FW3K=7.8?3.0?(0.45+0.42)?2=20.36KN 2层: FW2K=7.8?3.0?(0.42+0.4)?2=19.19KN 1层: FW1K=7.8?0.4?3.0/2+3.6?0.38?4.8=18.91 KN 风荷载受荷简图如图3.3所示
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武汉科技大学本科毕业设计
14.98KN28.78KN26.44KN24.1KN22.0KN20.36KN19.19KN18.91KNABCD 图3.3 风载作用受荷简图
3.4 地震荷载
3.4.1 重力荷载代表值计算
所谓重力荷载代表值是指的一个变形缝范围内楼层所有恒载与活荷载标准值
的组合
值,即恒载+0.5活载,具体计算结果如下:
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武汉科技大学本科毕业设计
1 恒载
屋面重力值:G面=5.66?(3.0?6.5+7.8?7?20.1-2.1?7.8-7.8?6.75-3?6.3)
=5515KN
楼板重力值:G板=3.55?(3.0?6.5+7.8?7?20.1-2.1?7.8-7.8?6.75-3?6.3)
=3459K
梁重力值:G1=0.4?0.75?6.5?25?9+0.3?0.5?6.3?25?17+0.3?0.6?7.8
?25?36+0.3?0.6?3?4?25+0.3?0.6?7.8?25?5+0.25?0.45?8.85?25?13+(2?0.02?6.5?9+2?0.02?6.3?17+2?0.02?7.8?36+2?0.02?3?
4+2?0.02?7.8?5+2?0.02?8.85?13)?17=3073KN
柱重力值: G上柱=27?17+42.2?18+0.25?0.25?25?3?12=1256KN G底柱=47.7?17+74.5?18+0.25?0.25?25?5.3?12=2218KN
突出屋面部分板自重:G2=6.75?7.8=52.65KN
楼梯自重:楼梯间荷载近似取为楼面荷载的1.5倍,即q=3.55?1.5=5.3KN/m2 为了安全起见取大值,可取q=6KN/m2,则楼梯自重为
G梯=6?(3.0?6.3+7.8?6.75+3.0?6.3)=542.7KN
墙重力值:G女儿墙=(2?20.1+3?2+7.8?5?2+2.1?2+7.8?3)?3=455.4KN 标准层墙重:G3=0.25?1.2?8?58.03?2+0.3?0.25?6.3?8?2+0.25?3?7.5
?8+0.25?8?3?2.1?2+0.25?1.2?7.5?8+0.2?3?8?(58.03-15)?2+0.25?8?3?(3+2.4?3)+0.2?3?8?17.7?12=1936KN
G标门窗=0.4?1.2?58.03?2+0.1?2.1?1.0?(15?2+12?2)=67KN G墙 = 0.25?1.5?8?58.03+0.25?4.5?8?20.1?2+0.2?4.5?8? 13.8?6=1132KN
G底门窗=0.4?2.6?58.03+0.4?3.8?58.03=148KN G突柱 =0.25?0.25?5.4?25?12=101KN
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