题目内容
为了避免矩形截面轴心受压构件长细比过大，承载力降低过多，常取l0/b ≤20, l0/h ≤15。
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为了减小构件的截面尺寸，节省钢材，受压构件宜采用较高强度等级的混凝土。
柱中纵向钢筋直径不宜小于16mm；全部纵向钢筋的配筋率不宜大于6%
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造型设计的作用是（）、（）、（）
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