某办公楼 KZ 如图所示, 已知 La E, = 33 d , 柱 保护层厚度取 2 0 mm , 混凝土强度等级 C 30 ; 抗震等级三级;环境类别:二级 , 钢筋无特殊锚固条件 , 计算 2 层、三层的钢筋量 。
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