1.(案例题)【背景资料】某钢筋混凝土对称配筋偏心受压柱,使用年限50年,环境类别为一类。请根据背景资料完成相应小题选项,中单选题四选- (A、B、C、D选项),多选题五选二或三或四(A、B、C、D、E选项) ；不选、多选、少选、错选均不得分。4、本案例中考虑二阶弯矩效应后的控制截面弯矩设计值为( )。 

A.限制截面尺寸的需要

B.确保不发生脆性破坏

C.确保混凝土保护层不剥落

D.确保构件的延性

A.188.64kN.m

B.197.42kN.m

C.205.85kN.m

D.246.28kN.m

A.<img src="https://cg-service.oss-cn-shanghai.aliyuncs.com/20240116/1705384181035559.png">

B.<img src="https://cg-service.oss-cn-shanghai.aliyuncs.com/20240116/1705384181053404.png">

C.<img src="https://cg-service.oss-cn-shanghai.aliyuncs.com/20240116/1705384181081187.png">

D.<img src="https://cg-service.oss-cn-shanghai.aliyuncs.com/20240116/1705384181098481.png">

A.正截面受弯承载力计算

B.斜截面受剪承载力计算

C.构件变形及裂缝宽度验算

D.扭转承载力计算

A.2346mm2

B.2467mm2

C.2595mm2

D.2622mm2

A.110mm

B.120mm

C.130mm

D.140mm

A.<img src="https://cg-service.oss-cn-shanghai.aliyuncs.com/20240116/1705384180856563.png">

B.<img src="https://cg-service.oss-cn-shanghai.aliyuncs.com/20240116/1705384180915885.png">

C.<img src="https://cg-service.oss-cn-shanghai.aliyuncs.com/20240116/1705384180943861.png">

D.<img src="https://cg-service.oss-cn-shanghai.aliyuncs.com/20240116/1705384180960409.png">

A.3058mm2

B.3149mm2

C.3272mm2

D.3364mm2