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【单选题】
采用考虑塑性内力重分布的方法计算钢筋混凝土连续梁内力时,要求支座截面相对受压区高度 ξ≤ 0.35 ,是为了( )A.
提高连续截面受弯承载力
B.
保证塑性铰有足够的转动能力
C.
提高连续梁斜截面受剪承载力
D.
减小构件裂缝宽度和挠度变形
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