某高层框架结构，乙类建筑，高度26m，抗震设防烈度6度，场地类别_爱下问搜题

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问题单项选择题

某高层框架结构，乙类建筑，高度26m，抗震设防烈度6度，场地类别为Ⅲ类，柱的断面为600mm×700mm，混凝土强度等级为C30。已知：底层框架柱在竖向荷载作用下的轴向力设计值为4500kN；在风荷载作用下的轴向力设计值为1400kN。该柱的轴压比为（）项数值。

A．0.56

B．0.76

C．0.71

D．0.89

答案

参考答案：D

解析：

由《高2010》表3.3.2—1，

H=26m＜60m，A级高度。由3.9.1—1款，按7度设防，由3.9.2，仍按7度设防，故按7度设防

由3.9.3，框架抗震等级为三级

查表6.4.2，[μN]=O.85

听力题

单词拼写

小题1:Fresh fruit, especially oranges and kiwis, c___________ plenty of Vitamin C.

小题2:He fought bravely in many wars and g___________ respect of the people and country.

小题3:In order to get f__________ with the new neighbour, I have decided to pay a visit to his house.

小题4:For the last fifty years, a number of man-made satellites have been sent up to e_________ space.

小题5:After having a healthy diet, WangPeng became s____________ than ever before.

小题6:It is against law to read other’s personal letters without __________（许可，允许）.

小题7:In our class, when the bell rang and the teacher closed his book, it was a _________（信号）for everyone to stand up.

小题8:The Internet is now widely used. ________ speaking（就我个人而言）, I almost cannot live without it.

多项选择题

电力系统事故依据事故范围大小可分为哪几类（）？

A.系统解列事故

B.局部事故

C.系统振荡事故

D.系统事故