试题与答案

题58～63：上海市区有10层的框架结构，丙类建筑，沿高度质量和刚度均匀。层高4.0

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题型：单项选择题

题目：

题58～63：

上海市区有10层的框架结构，丙类建筑，沿高度质量和刚度均匀。层高4.00m，已知房屋总高度H=40m，房屋总宽度B=30m，基本风压为w0=0.60kN/m2，房屋总长L =50m。第一、第二振型如题图所示，各层重力荷载代表值Gi=20000kN，结构阻尼比s’=0.05。

若楼顶处的风振系数β40=1.55，则屋面高度处的风荷载标准值wk（kN/m2）与（）项数值最为接近。

A．1.712

B．1.493

C．1.336

D．1.271

答案：

参考答案：C

解析：

已知β40=1.55，H/B=1.33＜4，故μs=1.3

则wk=β40μzμsω0=1.55×1.13×1.3×0.60=1.366

故选C

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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