第10题: [单项选择]有一座公路简支梁桥,计算跨径为20m,由5根主粱和5根横粱组成。等高度主粱,梁高为1.25m;跨中腹板厚度为0.16m,支点处腹板宽度应加宽。混凝土标号为30号。假定已计算出在支点处某根主梁的恒载剪力为275kN,活载剪力为182.5kN。 使用规范:《公路桥涵设计规范》(JTG D62—2004) 试问,该主梁支点处的承载能力极限状态剪力值与下列( )项数值最为接近。 A. 585.5kN B. 595.5kN C. 600.5kN D. 603.1kN 参考答案:A 答案解析:1.2SG+1.4S’Q1=275×1.2+182.5×1.4=585.5kN
第23题: [单项选择]What danger is presented if a waterspout passes over a ship?() A. Heavy rains could cause downflooding B. Visibility could be restricted by low clouds C. Large waves could cause structural damage D. Personnel may be injured by loose deck gear blown by the wind 参考答案:D