某抗震等级为二级的高层框架结构,首层的梁柱中节点,横向左、右侧梁截面尺寸及纵向梁截面尺寸如下图所示。梁柱混凝土强度等级为C30,f c =14.3MPa,f t =1.43MPa,a s =a s ′=60mm。节点左侧弯矩设计值M b l =420.52kN·m,右侧弯矩设计值M b r =249.48kN·m,上柱底部考虑地震作用组合的轴向压力设计值N=3484.0kN,节点上下层柱反弯点之间的距离H c =4.65m。 下列关于节点核心区的箍筋配置最合适的是()。
【单选题】听力原文:M: What can I do for you, Madam? W: Can I get a city map at the hotel? M: Yes, there is a newspaper stall downstairs where they have the city map. Shall I get one for you? W: No, thanks. We can g...