Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

NJIT professor tells architects building practices to withstand hurricanes

08.06.2010
Architecture for Humanity invites NJIT professor to help them in Haiti

Rima Taher, an expert in the design of low-rise buildings for extreme winds and hurricane, hopes her phone won't ring much this hurricane season. It's already been busy with requests for information about best building design and construction practices to reduce wind pressures on building surfaces.

In the aftermath of the January earthquake in Haiti, Taher, a civil and structural engineer at the NJIT College of Architecture and Design, prepared a document for Architecture for Humanity http://architectureforhumanity.org/about about best building practices for hurricane and earthquake-prone areas. It's posted on the organization's Haiti Reconstruction website and still circulates in Haiti. More recently, she cooperated with wind researchers at Tokyo Polytechnic University, Japan, to develop and translate from French a brochure for UNESCO to help Haitians prepare for the upcoming hurricane season. UNESCO will distribute the brochure in Haiti.

In 2007 Taher's article about the design of low-rise buildings for extreme wind events appeared in the Journal of Architectural Engineering of the American Society of Civil Engineers. Another article on improved building practices for hurricanes appeared in Caribbean Construction Magazine in July of 2009.

"Certain home shapes and roof types can make a big difference," is a common refrain in all her work.

Her recommendations include the following.

Design buildings with square, hexagonal or even octagonal floor plans with roofs of multiple slopes such as a four-sloped hip roof. These roofs perform better under wind forces than the gable roofs with two slopes. Gable roofs are common only because they are cheaper to build. Research and testing demonstrate that a 30-degree roof slope will have the best results.

Wind forces on a roof tend to uplift it. "This explains why roofs blow off during extreme wind events," Taher said. To combat uplift, she advises connecting roofs to walls strongly with nails, not staples. Stapled roofs were banned in Florida after Hurricane Andrew. The use of hurricane clips is recommended. The choice of roofing is important. Different roofing systems perform differently under hurricane conditions. In tile roofs, loose tiles often become wind-borne debris threatening other structures.

Aim for strong connections between the structure and foundation. Structural failure-- one structural element triggering the collapse of another—can be progressive.

Hurricane shutters can protect glazing from wind-borne debris. Various designs are available.

Roof overhangs are subject to wind uplift forces which could trigger a roof failure. In the design of the hurricane-resistant home, the length of these overhangs should be limited to about 20 inches.

The design of the researched cyclonic home includes simple systems to reduce the local wind stresses at the roof's lower edges such as a notched frieze or a horizontal grid. Install the latter at the level of the gutters along the homes' perimeter.

An elevated structure on an open foundation reduces the risk of damage from flooding and storm-driven water. All foundation piles must be strengthened by bracing and should penetrate deep enough into the soil to reduce the risk of scour.

NJIT, New Jersey's science and technology university, at the edge in knowledge, enrolls more than 8,400 students in bachelor's, master's and doctoral degrees in 92 degree programs offered by six colleges: Newark College of Engineering, College of Architecture and Design, College of Science and Liberal Arts, School of Management, Albert Dorman Honors College and College of Computing Sciences. NJIT is renowned for expertise in architecture, applied mathematics, wireless communications and networking, solar physics, advanced engineered particulate materials, nanotechnology, neural engineering and e-learning. In 2009, Princeton Review named NJIT among the nation's top 25 campuses for technology and among the top 150 for best value. U.S. News & World Report's 2008 Annual Guide to America's Best Colleges ranked NJIT in the top tier of national research universities.

ATTENTION EDITORS: To interview Taher, call Sheryl Weinstein at 973-596-3436 or contact Taher directly at 973-340-9095

Sheryl Weinstein | EurekAlert!
Further information:
http://www.njit.edu

More articles from Architecture and Construction:

nachricht Construction Impact Guide
18.05.2018 | Hochschule RheinMain

nachricht New, forward-looking report outlines research path to sustainable cities
24.01.2018 | National Science Foundation

All articles from Architecture and Construction >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Explanation for puzzling quantum oscillations has been found

So-called quantum many-body scars allow quantum systems to stay out of equilibrium much longer, explaining experiment | Study published in Nature Physics

Recently, researchers from Harvard and MIT succeeded in trapping a record 53 atoms and individually controlling their quantum state, realizing what is called a...

Im Focus: Dozens of binaries from Milky Way's globular clusters could be detectable by LISA

Next-generation gravitational wave detector in space will complement LIGO on Earth

The historic first detection of gravitational waves from colliding black holes far outside our galaxy opened a new window to understanding the universe. A...

Im Focus: Entangled atoms shine in unison

A team led by Austrian experimental physicist Rainer Blatt has succeeded in characterizing the quantum entanglement of two spatially separated atoms by observing their light emission. This fundamental demonstration could lead to the development of highly sensitive optical gradiometers for the precise measurement of the gravitational field or the earth's magnetic field.

The age of quantum technology has long been heralded. Decades of research into the quantum world have led to the development of methods that make it possible...

Im Focus: Computer-Designed Customized Regenerative Heart Valves

Cardiovascular tissue engineering aims to treat heart disease with prostheses that grow and regenerate. Now, researchers from the University of Zurich, the Technical University Eindhoven and the Charité Berlin have successfully implanted regenerative heart valves, designed with the aid of computer simulations, into sheep for the first time.

Producing living tissue or organs based on human cells is one of the main research fields in regenerative medicine. Tissue engineering, which involves growing...

Im Focus: Light-induced superconductivity under high pressure

A team of scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg investigated optically-induced superconductivity in the alkali-doped fulleride K3C60under high external pressures. This study allowed, on one hand, to uniquely assess the nature of the transient state as a superconducting phase. In addition, it unveiled the possibility to induce superconductivity in K3C60 at temperatures far above the -170 degrees Celsius hypothesized previously, and rather all the way to room temperature. The paper by Cantaluppi et al has been published in Nature Physics.

Unlike ordinary metals, superconductors have the unique capability of transporting electrical currents without any loss. Nowadays, their technological...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Save the date: Forum European Neuroscience – 07-11 July 2018 in Berlin, Germany

02.05.2018 | Event News

Invitation to the upcoming "Current Topics in Bioinformatics: Big Data in Genomics and Medicine"

13.04.2018 | Event News

Unique scope of UV LED technologies and applications presented in Berlin: ICULTA-2018

12.04.2018 | Event News

 
Latest News

Supersonic waves may help electronics beat the heat

18.05.2018 | Power and Electrical Engineering

Keeping a Close Eye on Ice Loss

18.05.2018 | Information Technology

CrowdWater: An App for Flood Research

18.05.2018 | Information Technology

VideoLinks
Science & Research
Overview of more VideoLinks >>>