题目内容
(请给出正确答案)
[主观题]
某单层工业厂房为装配式混凝土结构,预应力折线形屋架重49.5KN屋架高3.2M柱重52KN车间跨度24.0M如图所示,试选用安装构件时所需得覆带式起重机得型号.答案:F=4m E=1.7m H4=6mQ2=0.2*9.8=1.96KN Q=Q1+Q2=53.96KN H=10.9 +0.3+6=18.5mL' =L1+L2 h =10.9+0.3 +1.3-1.7=10.8m a=arctan<10.8/13>-3=42.3L=10.8/sin42.3+13/cos42.3=33.63 mR=F+C0S42.3=28.5m选;W1 - -200型起重机 其; Q=8T>Q选; W1 —200 型起重机 Q>T8=Q ;其L’=40 M>L H’=25>H故符合要求!
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