修建于裹冰区的某电视塔,其顶部竖向钢桅杆的长度为10m,直径为400mm,基本裹冰厚

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问题:

修建于裹冰区的某电视塔,其顶部竖向钢桅杆的长度为10m,直径为400mm,基本裹冰厚度为20mm,基本风压值为ωo=0.35kN/m2,桅杆处的风振系数βz=1.7,风压高度变化系数μz=2.8,重现期调整系数μr=1.1,风载体型系数μs=0.8。对承载力极限状态,当裹冰荷载为第一可变荷载时,在荷载效应的基本组合中,则桅杆底部由风载产生的剪力设计值(kN),与()项数值最为接近。

A.2.26

B.3.87

C.9.03

D.3.52

考点:二级注册结构工程师二级结构师专业知识一、二级注册结构工程师专业部分
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