木材的持久强度一般为短期极限强度的( )。A. 20% -30% B. 30% -40%C. 40% -50% D. 50% -60%

作者: rantiku 人气: - 评论: 0
问题 木材的持久强度一般为短期极限强度的( )。 A. 20% -30% B. 30% -40% C. 40% -50% D. 50% -60%
选项
答案 D
解析 木材的持久强度(长期荷载作用下不致引起破坏的最大强度)一般为短期极限强度的50% -60%。

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