试题与答案

16~19:某单层工业厂房,设置有两台Q=25/10t的软钩桥式吊车,吊车每侧有两个

题型:单项选择题

题目:

16~19:

某单层工业厂房,设置有两台Q=25/10t的软钩桥式吊车,吊车每侧有两个车轮,轮距4m,最大轮压标准值Pmax=279.7kN,吊车横行小车重量标准值g=73.5kN,吊车轨道的高度hR=130mm。

厂房柱距12m,采用工字形截面的实腹式钢吊车梁,上翼缘板的厚度hf=18mm。腹板厚度tw=12mm。沿吊车梁腹板平面作用的最大剪力为V,在吊车梁顶面作用有吊车轮压产生的移动集中荷载P和吊车安全走道上的均布荷载q。

当吊车为中级工作制时,试问,在吊车最大轮压作用下,在腹板计算高度上边缘的局部压应力设计值(N/mm2),应与下列()项数值最为接近。

A.85.7

B.61.2

C.50.4

D.48.2

答案:

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