【判断题】【消耗次数:1】
当截面上最大剪应力或最大主拉应力达到混凝土抗拉强度时,结构达到混凝土即将出现裂缝极限状态。
正确
错误
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相关题目
【单选题】 在局部压力作用下,局部受压区段,产生横向拉应力,当拉应力超过混凝土抗拉强度时,出现纵向裂缝,裂缝一旦出现,“套筒”作用大大( )。
①  减小
②  增大
【单选题】 预应力筋进行张拉时,混凝土强度必须达到其设计强度的( )。
①  20%
②  50%
③  75%
④  100%
【单选题】 矩形截面杆受扭时,横截面上的最大剪应力发生在()
①  长边中点
②  短边中点
③  角点
④  形心
【单选题】 重要预应力构件,混凝土强度应达到设计强度多少时方能张拉预应力筋:
①  70%
②  80%
③  90%
④  100%
【判断题】 混凝土在剪应力和法向应力双向作用下,抗剪强度随拉应力的增大而增大。
①  正确
②  错误
【判断题】 混凝土在剪应力和法向应力双向作用下,抗剪强度随拉应力的增大而增大
①  正确
②  错误
【判断题】 受弯构件受压区最外边缘混凝土应力达到最大时,构件即破坏。
①  正确
②  错误
【判断题】 若要使结构构件的裂缝达到一级或二级要求,必须对其施加预应力,将结构或构件做成预应力混凝土结构构件。
①  正确
②  错误
【单选题】 在纯剪应力状态中,任意两相互垂直截面上的剪应力,必定是()
①  均为正值
②  均为负值
③  一正一负
④  均为零
【单选题】 预应力混凝土结构可以避免构件裂缝的过早出现。
①  正确
②  错误
随机题目
【单选题】 8.We have very much ______ your prompt attention to our request.
①  enjoyed
②  appreciated
③  liked
④  . reduced
【单选题】 17.Her_____ body language spoke much louder than her actual words.
①  graceful
②  . grateful
③  gracious
④  grand
【单选题】 16.Tom and Jerry both gave good reports, but Tom’s was_____.
①  best
②  the best
③  better
④  the better
【单选题】 18.Hers is _____ as yours.
①  report as good
②  a such good report
③  as good a report
④  so good report
【单选题】 6. What really ______ is that the teacher should be responsible for his students.
①  happens
②  cares
③  minds
④  matters
【单选题】 22. He ran a fever yesterday but feels far __________ today.
①  better
②  Worse
【单选题】 27.He asked me to lend him some money, which I agreed to do, ________ that he paid me back the following week.
①  on occasion
②  on purpose
③  on condition
④  only if
【单选题】 14. His cousin is three years _____ than him.
①  elder
②  oldest
③  older
④  the eldest
【单选题】 23. Mary is just ___________ before. She needs more exercises.
①  pale than
②  as pale as
【单选题】 12. That’s ______ joke I have ever heard.
①  the funniest
②  more funny
③  a funniest
④  funnier