单项选择题
某框架结构抗震等级为一级,框架梁局部配筋图如图1-25所示。梁混凝土强度等级C30(fc=14.3N/m㎡),纵筋采用HRB400
(fy=360N/m㎡),箍筋采用HRB335(Φ),梁ho=440mm。试问,下列关于梁的中支座(A—A处)上部纵向钢筋配置的选项,如果仅从规范、规程对框架梁的抗震构造措施方面考虑.哪一项相对准确?

A.<br /><img src="https://imgtest.ppkao.com/ExamPaperRes/2012/12/13/de652ba507914df49b4983394a40a3ed/64b8621e-a1bd-4d36-81fc-1ba93e10b64c.jpg">
B.<br /><img src="https://imgtest.ppkao.com/ExamPaperRes/2012/12/13/de652ba507914df49b4983394a40a3ed/3917e482-b355-49a3-a520-ce6c51768619.jpg">
C.<br /><img src="https://imgtest.ppkao.com/ExamPaperRes/2012/12/13/de652ba507914df49b4983394a40a3ed/9a7138d3-d879-4631-8ae3-097368feb7c6.jpg">
D.<br /><img src="https://imgtest.ppkao.com/ExamPaperRes/2012/12/13/de652ba507914df49b4983394a40a3ed/fa24bbd3-a491-4667-8a8d-31d0463c4736.jpg">