问题 单项选择题

某10层现浇钢筋混凝土框架-剪力墙结构房屋,丙类建筑,剖面图如图所示。其抗震设防烈度为8度,地震分组第二组,地震加速度0.20g,Ⅱ类场地。质量和刚度沿高度分布比较均匀,但屋面有局部突出的小塔楼。阻尼比ξ=0.05。结构的基本周期T1=1.13s。各层的重力荷载代表值如下:

G1=1400kN,G2=G3=G4=G5=G6=G7=G8=G9=0.9G1,Cn=0.09G1,小塔楼的侧向刚度与主体结构的层侧向刚度之比Kn/K=0.05。

计算结构水平地震作用标准值FEK(kN),其与()项数值最为接近。

A.6802

B.5417

C.7243

D.6122

答案

参考答案:A

解析:

根据题意,可采用底部剪力法计算。

FEk1Geq=0.06288×0.85×127260=6802(kN)

多项选择题
写作题

第二节读写任务(共1小题,满分25分)

阅读下面的短文,然后按照要求写一篇150词左右的英语短文。

The generation gap between students and teachers is becoming more significant with only 3.3 percent out of a survey group of 1,000 students from 30 key middle schools in the city saying they would be willing to tell their teachers of their inner thoughts.

In today’s educational environment, teachers are positioned to be the authority figure for learning instead of also becoming good friends in the life of students.

As only students with good marks in exams are considered the “ apples in the eyes” of the teachers, most students think their teachers to be partial (偏心).

“ I feel sad to hear such remarks”, said Yu Yi , a well-known special-class teacher.

She recalled that in the past, teachers and students would play basketball together or comment on the novels while sitting on the grass during a break. But today, study and good marks are the only topics of conversation between students and teachers.

“Schools are not only the place where knowledge is imparted (传授) but also where students are taught how to be an upright person,” Yu said. “The success of a person is not merely determined by intelligence but also by emotional state. ”

Yang Xiong, director of the Juvenile Research Institute, said the educational system which focuses on examinations should be held to be substantially responsible.

[写作内容]

1. 以约30个词概括学生不愿告诉老师内心想法的原因;

2. 以约120个词就“现代师生关系”这个主题发表你的看法,包括如下要点:

( 1 ) 你是否愿意告诉老师你内心的想法,为什么?

( 2 ) 你希望你与你的老师之间的关系是怎样的,如何才能建立这种关系?

[写作要求]

1. 可以使用实例或其他论述方法支持你的论点,也可以参照阅读材料的内容,但不得直接引用原文中的句子;2. 标题自定;3. 文中不能出现考生真实姓名和学校名称。

[评分标准]    概括准确,语言规范,内容合适,篇章连贯。