问题 问答题 简答题

简述现行标准XXX规定的盆式橡胶支座的检测条件与主要检测项目?

答案

参考答案:主要检测项目是竖向压缩变形、盆环径向变形、支座转动角。

其检验荷载应是支座设计承载力的1.5倍,并以10个相等的增量加载。在支座顶底板间均匀安装四只百分表,测试支座竖向压缩变形;在盆环上口相互垂直的直径方向安装四只千分表,测试盆环径向变形。加载前应对试验支座预压3次。

在竖向设计荷载作用下,支座压缩变形值不得大于支座总高度的2%,盆环上口径向变形不得大于盆环外径的0.05%,支座残余变形不得超过总变形量的5%固定支座在各方向和单向活动支座非滑移方向的水平承载力均不得小于支座竖向承载力的10%。

抗震型支座水平承载力不得小于支座竖向承载力的20%

支座转动角度不得小于0.02rad。

阅读理解

The necktie looks set to follow the top hat in being handed over to the fashion museum by office workers within the next 50 years, according to research.

Nearly three quarters (74%) think the tie will not survive within British firms beyond the next half a century with the popularity of the open-collared shirt. Its demise is being blamed on the boom in creative businesses, such as Facebook and Google, and online trading companies where formal dress codes tend to be avoided in favour of a more casual approach.

Once considered an important part of business dress, the tie has become a victim of the spread of "casual Fridays" into other weekdays, according to researchers.

The poll, by Deal Jungle. com, which helps small and medium enterprises, found more than half (51% ) thought the tie would die out in offices within the next 20 years and almost a quarter (22%) believed it would last less than 10 years.

A spokesman for the site, which has 20, 000 registered members, said: "Ties have been around seemingly forever but increasing numbers of office workers are telling them to get away."

"The success of businesses such as Facebook and Google, where even the CEO turns up wearing jeans and a hoodie, also seems to have had a corrosive (侵蚀性) effect on the idea of dressing formally for work."

"Many of our members keep their expenses to a minimum by working from home so they feel no need to dress up to go to work. We know that when they meet with clients, they still put on a business suit, but a tie is no longer seen as an essential part of the suited-and-booted look."

"Instead, many businessmen and increasing numbers of executives choose a suit and shirt with an open collar. The tie-less suit creates an impression of a more approachable deal maker, someone who is still business-minded, yet creative and technology-sensible, too. "

小题1:Why are ties expected to disappear in offices?

A.CEOs in creative businesses set a rule to forbid wearing ties.

B.The idea of casual weekdays is increasingly accepted.

C.Office workers are tired of wearing ties daily.

D.The tie-less look appears more modern.小题2:According to the spokesman, how are their members dressed before clients?

A.Business suits and casual jeans.

B.Formal suits and a shirt with a tie.

C.Casual suits and buttoned-up shirt.

D.Business suits and an open-collared shirt.小题3:What kind of image does the tie-less suit create?

A.Accessible in business.

B.Professional in fashion.

C.Casual in working.

D.Creative in dressing.小题4:What does the underlined word "demise" mean in Para.2?

A.popularity

B.survival

C.disappearance

D.development

单项选择题