大工10秋《钢筋混凝土结构》在线作业3(国外英文资料).doc

大工10秋《钢筋混凝土结构》在线作业3(国外英文资料) Big work 10 autumn reinforced concrete structure online homework 3 Total score: 100 test time: - test scores: 100 ? Radio examination ? A multiple-choice question ? Judgment question Radio examination questions (5 questions, 30 points) Score: 30 1., can be regarded as prestressed steel cold drawn low carbon steel wire is (). A. class A and class B cold drawn low carbon steel wire B. class B cold drawn low carbon steel wire C. C cold drawn low carbon steel wire D. class a cold drawn low carbon steel wire The correct answer: D Full Score: 6 points: 6 2. when other conditions are the same, the choice of the reinforcement diameter and the root number is the best choice for the crack. A. thicker deformed steel bars B. thicker round steel bar C. deformed steel bars of finer size D. thinner round steel bar The correct answer: C Full Score: 6 points: 6 3., the average crack spacing is independent of Lcr. Thickness of protective layer of A. steel B. reinforcement diameter Effective reinforcement ratio of C. tensile steel bars D. grade of concrete The correct answer: D Full Score: 6 points: 6 4. the crack width calculation method used in the current standard of our country is (). A. test statistics B. semi theoretical and semi empirical method C. mathematical statistics D. probability limit method The correct answer: B Full Score: 6 points: 6 5., the most effective measure to reduce the crack width of beams is (). A. increases cross-sectional dimensions B. increase concrete strength grade C. selects the smaller diameter steel bar, increases the tensile reinforcement area, and reduces the stress of the steel bar in the crack section D. choose larger diameter steel bars The correct answer: C Full Score: 6 points: 6 big work, 10 autumn, reinforced concrete structure online homework 3 Total score: 100 test time: - test scores: 100 ? Radio examination ? A multiple-choice question ? Judgment question , (a total of 2 multiple-choice questions, a total of