1.(单选题)某框架底层柱如图所示,柱截面尺寸300mm×500mm,该柱在基础顶面处的箍筋加密区高度应为( )mm。

A. <img src="https://cg-service.oss-cn-shanghai.aliyuncs.com/20240111/17049597618391010.png">

B. <img src="https://cg-service.oss-cn-shanghai.aliyuncs.com/20240111/1704959761922405.png">

C. <img src="https://cg-service.oss-cn-shanghai.aliyuncs.com/20240111/1704959761979638.png">

D. <img src="https://cg-service.oss-cn-shanghai.aliyuncs.com/20240111/1704959762029364.png">

A.<img src="https://cg-service.oss-cn-shanghai.aliyuncs.com/20240111/1704959811354975.png">

B.<img src="https://cg-service.oss-cn-shanghai.aliyuncs.com/20240111/170495981137920.png">

C.<img src="https://cg-service.oss-cn-shanghai.aliyuncs.com/20240111/1704959811435752.png">

D.<img src="https://cg-service.oss-cn-shanghai.aliyuncs.com/20240111/1704959811501695.png">

A.450mm

B.600mm

C.1050mm

D.1400mm

A.450mm

B.600mm

C.900mm

D.1200mm

A.该截面处梁上部纵筋共有2根直径为25mm的HRB400级钢筋

B.该截面处梁上部纵筋共有8根直径为25mm的HRB400级钢筋，分两层设置，每一层放置4根

C.该截面处梁下部纵筋共有5根直径为25mm的HRB400级钢筋

D.该截面处梁箍筋间距为200mm

A.<img src="https://cg-service.oss-cn-shanghai.aliyuncs.com/20240111/1704959811120603.png">

B.<img src="https://cg-service.oss-cn-shanghai.aliyuncs.com/20240111/1704959811141111.png">

C.<img src="https://cg-service.oss-cn-shanghai.aliyuncs.com/20240111/1704959811161288.png">

D.<img src="https://cg-service.oss-cn-shanghai.aliyuncs.com/20240111/1704959811221182.png">

A.450mm

B.600mm

C.1050mm

D.1400mm

A.370mm×370mm

B.370mm×490mm

C.240mm×370mm

D.490mm×490mm

A.0.2

B.0.3

C.0.4

D.0.5