-橫向風(fēng)荷載計(jì)算

1、第五章 橫向風(fēng)荷載計(jì)算5.1 自然情況基本風(fēng)壓為0.40kN/m2,即W0=0.40kN/m2,c類(lèi)粗糙度。5.2 荷載計(jì)算：1 .風(fēng)荷載標(biāo)準(zhǔn)值Wk= B z-NzWFWki = wki m AB z-高度z處的風(fēng)振系數(shù)2 .風(fēng)壓Ml度變化系數(shù)（p. z） ：p, 5=0.84p, 4= p. 3= p. 2= p. 1=0.743 .風(fēng)荷載體型系數(shù)：呼=1.4數(shù) 3z=1.04 .Z高度處的風(fēng)振系數(shù)層數(shù)3 ZWS科ZiWWFWkiV51.01.40.840.400.475.635.6340.740.416.6412.2730.740.416.6418.9120.740.416.6425.55

2、10.740.417.4132.96在實(shí)際工程中，對(duì)于高度不大于30m高寬比小于1.5的高層建筑，取風(fēng)振系5 .Fwk5=0.47 義(0.8+1.8) X4.5=5.63kNFwk4=0.41 X 3.6 X 4.5=6.642kNFwk3=0.41 X3.6 X 4.5=6.642kNFwk2=0.41 X3.6 X4.5=6.642knFwk1=0.41 X (1.8+2.215) X4.5=7.41kN6 .層間剪力 V 5=5.63kN V 4=12.276kN V 3=18.91kN V 2=25.55kN V 1=32.96kN7 .荷載作用分布圖：V25.6312.2718.9

3、125.5532.96 忖5.3風(fēng)荷載作用下框架柱剪力和柱彎矩(D值法，取橫向中框架計(jì)算)1 .柱剪力 V ik=D/2D xVi ,柱彎矩 M 下Vk XYi , M =VikX (1-Yi ) x hi2 .反彎點(diǎn)高度 h二(y0+yi+y2+y3)Xhy0標(biāo)準(zhǔn)反彎點(diǎn)高度比yi 為上、下層梁線剛度變化修正值y2為上層層高變化修正值y 3為下層層高修正值根據(jù)框架總層數(shù)m,該柱所在層數(shù)n和梁柱線剛度比值K確定，對(duì)于地震作用，y 值由按荷載表查得，并由內(nèi)插法根據(jù) K值確定，并考慮層高的因素進(jìn)行修正。3.邊柱彎矩計(jì)算：層H2 DDD/N DViVikkYM下M上53.6118332233330.1

4、975.631.1090.790.301.1982.79543.6118332233330.19712.272.4170.790.403.4805.22133.6118332233330.19718.913.7250.790.456.0357.38623.6118332233330.19725.555.0330.790.509.0599.05914.4398388219140.22332.967.3500.970.6521.16411.396層H2 DDD/NDViVkkYM下M上53.6118332233330.3035.631.7061.490.382.3033.83943.6118332

5、233330.30312.273.7181.490.435.6897.69633.6118332233330.30318.915.7301.490.489.79810.83023.6118332233330.30325.557.7421.490.513.93613.93614.4398388219140.27732.969.1301.840.5722.89217.554計(jì)算過(guò)程（1） Vik =-Vi“ D(2) 乂下=丫腦(3) M上飛(1 y)h5.4荷載作用下梁端彎矩計(jì)算根據(jù)節(jié)點(diǎn)平衡由柱端彎矩求得梁軸線處彎矩O CH O （L2 Mc= M + 乂左=M 上+ M 下KiK2KiK2Ki K2M右（左梁尸gMcM左（右梁尸Mc求得邊跨11 i=1中跨 以 1=0.531 仙 2=0.469風(fēng)荷載作用下框架梁端剪力和柱軸力標(biāo)準(zhǔn)植樓 層AB跨梁端剪力BC跨梁端剪力柱軸力LM&M右VELM左M右VE邊柱中柱57.22.7952.0390.6712.71.8001.8001.3330.6710.66247.26.7195.3091.6712.74.6904.6903.4742.3422.46537.210.8568.7722.7262.77.7477.7475.7395.0685.47827.215.09412.6033.8472.711.13111.1318.