www射-国产免费一级-欧美福利-亚洲成人福利-成人一区在线观看-亚州成人

USEUROPEAFRICAASIA 中文雙語Fran?ais
China
Home / China / Innovation

Rocket science steps up for quake safety

By Zhao Lei | China Daily | Updated: 2017-11-04 07:10

Chinese rocket engine designers have used their expertise to create a new twist on an old idea to help buildings withstand earthquakes.

The basic idea, known as seismic base isolation, is to decouple a building's superstructure from its underlying support structure, so that shock waves from an earthquake are absorbed.

While the basic concept is not new, engineers at the Academy of Aerospace Solid Propulsion Technology in Xi'an, Shaanxi province, found a way to adapt some techniques used in the production of flexible joint nozzles - key parts on rocket engines - to make seismic base isolators that perform better than others of their kind on the market.

The academy is part of the country's major space contractor, China Aerospace Science and Technology Corp, and mainly makes solid-fuel engines for Chinese carrier rockets and ballistic missiles.

You Junfeng, a chief designer of solid-propellant rocket engines at the academy, said designers developed a new type of base isolator with multiple layers of steel plates and rubber matting.

Such base isolators can help a building withstand earthquakes by mitigating about 80 percent of the seismic force, he said.

"The capabilities of our product are better than the requirements in the national standards and those of similar products in the market," he said. "This is because we used special molding and optimization methods in production. Such methods are typically employed in the production of space products rather than civilian goods, so other isolator makers don't have them."

The isolators have a service life of at least 60 years, he added.

Bai Xueshuang, a seismic analyst at the China Academy of Building Research, said deploying base isolators beneath a building is common in the construction industry, but it has not been widely used in China because it costs more for builders.

"The space engineers' design appears to be effective and reliable. If they can give it an affordable price, the product will have a lot of opportunities in the industry," Bai said.

The isolators can also be retrofitted to existing buildings, Bai said, though doing so would likely be expensive.

"China is one of the most earthquake-prone nations in the world, so it needs reliable and effective means to protect its buildings, especially the vast amount of old, low-rise residential structures," he said.

At Dali County Experimental Primary School in Shaanxi province, base isolators designed by the rocket experts have been used in three newly built buildings. There are 30 isolators laid beneath each building, with 6 meters between them, according to Tang Chunyu, an official at the academy in charge of marketing the product.

He said the academy is striving to promote the isolators to the construction industry. The market potential is large, as there are only about 3,000 buildings on the Chinese mainland that have used any kind of base isolation technology, he said.

Editor's picks
Copyright 1995 - . All rights reserved. The content (including but not limited to text, photo, multimedia information, etc) published in this site belongs to China Daily Information Co (CDIC). Without written authorization from CDIC, such content shall not be republished or used in any form. Note: Browsers with 1024*768 or higher resolution are suggested for this site.
License for publishing multimedia online 0108263

Registration Number: 130349
FOLLOW US
 
主站蜘蛛池模板: 成人三级做爰在线视频 | 亚洲精品在线免费观看视频 | 亚洲成人欧美 | 日韩欧美综合 | 久久精品国产99久久久 | 亚洲日本精品 | 一区二区三区影视 | 成在线人免费视频 | 日本高清免费视频色www | 99精品国产成人一区二区在线 | 一区二区三区精品国产欧美 | 欧美一级毛片在线播放 | 男人天堂avav| 国产日韩精品一区二区 | 99国产精品久久久久久久日本 | 色天天躁夜夜躁天干天干 | 亚洲精品天堂自在久久77 | 亚洲精品综合一二三区在线 | 国产成在线观看免费视频成本人 | 久久久久久综合对白国产 | 欧美视频在线观 | 颜值超高的女神啪啪 | 成人毛片免费观看视频 | 伊人波多野结衣 | 玖玖视频精品 | 久久亚洲人成国产精品 | 精品视频99 | 日韩a级一片 | 黄色美女网站视频 | 成人影院欧美大片免费看 | 国产精品三级手机在线观看 | 亚洲一区二区影院 | 一级黄片毛片 | 国产一区二区三区免费在线观看 | 欧美成人午夜在线全部免费 | 久草97| 亚洲综合网在线观看 | 97se狠狠狠狠狠亚洲综合网 | 99久久久免费精品免费 | 女人张开双腿让男人 | 一级欧美过瘾大片 |