單項(xiàng)選擇題 某受拉邊傾斜的I字形截面簡支梁(圖10-3),受拉邊的傾角β=20°,離支座中心距離a=2000mm處作用一集中力P=400kN,混凝土強(qiáng)度等級(jí)C25(f
![ayVEX8Hfxn.png ayVEX8Hfxn.png](/jiegou/Files/2017-9/14/123002398.png)
11.9N/mm
![KzqkRwzOjC.png KzqkRwzOjC.png](/jiegou/Files/2017-9/14/123004620.png)
),箍筋用HPB300級(jí)。已知梁腹板厚b
![IdePvxvLFb.png IdePvxvLFb.png](/jiegou/Files/2017-9/14/123001999.png)
=160mm,腹板高h(yuǎn)
![IdePvxvLFb.png IdePvxvLFb.png](/jiegou/Files/2017-9/14/123001999.png)
=820mm,翼緣高度h
![sKoswz8Bcs.png sKoswz8Bcs.png](/jiegou/Files/2017-9/14/123001980.png)
=100mm,
![gEOq3hBYWY.png gEOq3hBYWY.png](/jiegou/Files/2017-9/14/123001179.png)
。結(jié)構(gòu)安全等級(jí)二級(jí)。取a
![5BLo9T3gs1.png 5BLo9T3gs1.png](/jiegou/Files/2017-9/14/123008907.png)
=45mm。試問,當(dāng)僅配置箍筋時(shí),其箍筋配置,下列何項(xiàng)數(shù)值最合適?提示:斜截面條件滿足規(guī)范要求;忽略梁自重產(chǎn)生的剪力;
![grKDqRJXqA.png grKDqRJXqA.png](/jiegou/Files/2017-9/14/123004118.png)
。
![42dbO5jaBK.png 42dbO5jaBK.png](/jiegou/Files/2017-9/14/12300177.png)