试题与答案

有一承受非恒载为主的钢筋混凝土框架柱,安全等级为二级,矩形截面尺寸b×h=300mm

题型:单项选择题 案例分析题

题目:

有一承受非恒载为主的钢筋混凝土框架柱,安全等级为二级,矩形截面尺寸b×h=300mm×500mm,对称配筋,每侧各配有320的钢筋(钢筋为HRB335),混凝土强度等级为C25,纵向受拉钢筋合力点至截面近边的距离as=40mm,柱的计算长度为l0=4.5m。

该柱在某荷载组合下,其正截面受压承载力计算中,受压区高度x=290mm,则在该组合内力下,柱的受拉主筋的应力σs(N/mm2)最接近于()项数值。

A.178

B.195

C.204

D.252

答案:

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