1.(单选题)如图所示外伸梁,B支座的弯矩大小为( )kN·m。

A. <img src="https://cg-service.oss-cn-shanghai.aliyuncs.com/20240118/1705563392965943.jpeg">

B. <img src="https://cg-service.oss-cn-shanghai.aliyuncs.com/20240118/1705563392982483.jpeg">

C. <img src="https://cg-service.oss-cn-shanghai.aliyuncs.com/20240118/170556339303245.jpeg">

D. <img src="https://cg-service.oss-cn-shanghai.aliyuncs.com/20240118/1705563393099145.jpeg">

A.-98

B.42

C.98

D.182

A.MB=17kN·m

B.MB=18kN·m

C.MB=21kN·m

D.MB=25kN·m

A.-98

B.42

C.98

D.-42

A.AB段剪力为负值，BC段剪力为正值

B.最大剪力为2qa

C.除A、C两端点外，各段的弯矩均为负值

D.|Mmax|=4qa2

A.FAX=O、FAY=19.37kN(↑)

B.FAX=5kN(→)、FAY=80.63kN(↑)

C.FAX=5kN(→)、FAY=19.37kN(↑)

D.FAX=O、FAY=80.63kN(↑)

A.P

B.0.5P

C.0.5Pa

D.PI

A.MA=-160kN·m，QA=8OkN

B.MA=-150kN·m，QA=60kN

C.MA=-180kN·m，QA=40kN

D.MA=180kN·m，QA=40kN

A.-0.25qa

B.0.25qa

C.-0.5qa

D.1.5qa