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求图 1 轴心受压构件截面的设计承载力 N ,两端铰接轴压柱,柱高 6m , l 0x =6m , l 0y =3m ,横截面上有 1 个直径为 24mm 的螺栓,如图 1 所示。已知柱截面惯性矩: , 。钢材 Q235B , 。(截面对 2 个主轴均属 b 类,稳定系数 φ 见表 1 。)( 13 分) 表 1 稳定系数 φ λ 40 45 50 55 60 65 70 75 80 85 90 95 φ 0.889 0.878 0.856 0.833 0.807 0.780 0.751 0.720 0.688 0.655 0.621 0.588
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