货架承载力计算

1、货架承载力计算（单位：公斤）横梁长度10001200150018002000220023002400250026002700280030003300抱焊梁80X50X1.5264322021982180217231651158515241468141513211201100X50X1.55487365830482743249423862286219521102032195918291662100X50X2.0470639223530320830692941282327152614252123532139110X50X1.5632842193515316428762751263625312433

2、2343226021091917120X50X1.5720040003600327231303000288027692666257124002181120X50X2.051704653423040463877372235793446332331022820140X50X1.54555414039603795364435033374325330362760140X50X2.05877534351104897470245214353419839183562P型梁50X30X1.235828723821550X30X1.546537330928025424360X40X1.5150012501000

3、83375068065062560X40X2.0225018001500135012271173112580X50X1.5525042003500315028632739262525202423233380X50X2.07200580048504300395038003600350033503200110X50X2.0950080007400650060005750550052005000矩形管50X30X1.5283022601880170050X30X1.83930327026202180196050X30X2.0360028802400216060X40X1.55700475038003

4、15028502590247560X40X1.8669055804460372033403040290060X40X2.060004800400036003270313080X40X1.51236098808240741067406440618080X40X2.02808023400187201560014040127601220011700100X50X2.044640372002976024800223202029019400186001785017170165001.抱梁和矩形管截面横梁的承载能力计算：货架的承载能力为P（总载重），货架材料的许用应力为b,横梁长度为L,抗弯截面模量为Wz

5、o按简支梁承受均布载荷计算，其承载力为:p12WzL对Q235,取许用应力为120MPa,对Q215取105MPa,XQQ195取90MPa。因此对后两种材料的货架承载力，需在Q235的基础上分别乘以系数0.875、0.75。2.P型梁横梁承载能力计算：首先计算P型梁横截面形心，然后计算IX、Iy、IXY、|QX、IQY。计算弯曲中心X0的位置Y1ylyIxyIxX02IxIyIXy假设弯曲横向力作用与台阶中点。P型梁受弯曲、扭转共同作用。分别按弯曲和扭转计算应力，然后按第三强度理论确定极限载荷。扇性惯性积的计算公式为：公式中：若bxc,hyc,则取：（b1xc0,（h1y”P型梁的扭矩在梁端最大，跨中最小，接近与零。因此按近似计算，可分别在跨中计算弯曲强度、支座端计算扭转强度。最大扭矩为：qlX0/2。或者：Mt=PX0/2。由于X0VVl。因此最大扭矩远小于最大弯矩（PL/8）。由于P型梁为闭口薄壁梁。因此其扭转切应力远小于弯曲正应力。所以按弯曲正应力计算极限载荷。但乘0.6的折算系数。P7.2WzP型管的计算是基于闭口薄壁管的假设计算的。若为开口薄壁管（管纵向未完全焊接）,则其承载能力只有计算值的i/3i/4。Iihtb；T(h”)IitXc3ch3I2I4th；6th1b24th23i