问题 单项选择题

有一两跨无吊车房屋,为弹性方案,柱间有支撑,其边柱截面为400mm×600mm的配筋砌块砌体柱,从基础顶面至边柱顶面的高度为8.0m,采用MU10单排孔混凝土砌块(孔洞率46%),Mb10砂浆,Cb20灌孔混凝土,并按100%灌孔,砌体抗压强度为fg=5.44N/mm2。纵向钢筋采用HRB335级(fy=300N/mm2)、箍筋用HPB300级(fyv=270N/mm2)。该边柱承受轴向力设计值N=331kN,沿长边方向的偏心距为665mm。结构安全等级二级。取

该柱采用对称配筋,试问,柱的纵向受压钢筋配置,与下列何项数值最为接近().

A.

B.

C.

D.

答案

参考答案:C

解析:

解答如下:

根据《砌体结构设计规范》9.2.4条、8.2.4条:

计算x、与混凝土结构大偏压计算方法是一致。

阅读理解

It's such a happy­looking library, painted yellow, decorated with palm­tree stickers and sheltered from the Florida sun by its own roof. About the size of a microwave oven, it's pedestrian­friendly, too, waiting for book lovers next to a sidewalk in Palm Beach Country Estates, along the northern boundary of Palm Beach Gardens.

It's a library built with love.

A year ago, shortly after Janey Henriksen saw a Brian Williams report about the Little Free Library organization, a Wisconsin­based nonprofit that aims to promote literacy and build a sense of community in a neighborhood by making books freely available, she announced to her family of four, “That's what we're going to do for our spring break!”

Son Austin, now a 10th­grader, didn't see the point of building a library that resembles a mailbox. But Janey insisted, and husband Peter unwillingly got to work. The 51­year­old owner of a ship supply company modified a small wooden house that he'd built years earlier for daughter Abbie's toy horses, and made a door of glass.

After adding the library's final touches(装点), the family hung a signboard on the front, instructing users to “take a book, return a book,” and making the Henriksen library, now one of several hundred like it nationwide and among more than 2,500 in the world, the only Little Free Library in Palm Beach County.

They stocked it with 20 or so books they'd already read, a mix of science fiction, reference titles, novels and kids' favorites. “I told them, keep in mind that you might not see it again,” said Janey, a stay­at­home mom.

Since then, the collection keeps replenishing(补充) itself, thanks to ongoing donations from borrowers. The library now gets an average of five visits a day.

The project's best pay­off, says Peter, are the thank­you notes left behind. “We had no idea in the beginning that it would be so popular.”

小题1:In what way is the library “pedestrian­friendly”?

A.It owns a yellow roof.

B.It stands near a sidewalk.

C.It protects book lovers from the sun.

D.It uses palm­tree stickers as decorations.小题2:Janey got the idea to build a library from ________.

A.a visit to Brian Williams

B.a spring break with her family

C.a book sent by one of her neighbors

D.a report on a Wisconsin­based organization小题3:The library was built ________.

A.by a ship supply company

B.on the basis of toy horses

C.like a mailbox

D.with glass小题4:What can we infer from the signboard?

A.It was made by a user of the library.

B.It marked a final touch to the library.

C.It aimed at making the library last long.

D.It indicated the library was a family property.小题5:The passage tells us that the users ________.

A.donate books to the library

B.get paid to collect books for the library

C.receive thank­you notes for using the library

D.visit the library over 5 times on average daily

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