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Buildings & Construction

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Displaying 426 - 450 of 3873

Wind Effects on Tall Buildings: A Database-Assisted Design Approach

February 19, 2017
Author(s)
William P. Fritz, Emil Simiu
A rigorous procedure that calculates wind-induced effects on tall buildings is presented. The method, an extension of Database-Assisted Design (DAD), uses sets of time histories of pressures recorded simultaneously in the wind tunnel at a large number of

Wind Load Factors for Tall Building Design and the ASCE 7 Standard

February 19, 2017
Author(s)
Rene D. Gabbai, Emil Simiu
Wind load factors incorporated in the ASCE 7 Standard are based on rough approximations of wind effects and the uncertainties inherent in them. These factors are routinely applied to tall building design, even though the original calculations on which they

Wind Speeds for the Estimation of World Trade Center Towers' Response

February 19, 2017
Author(s)
William P. Fritz, Fahim H. Sadek, Emil Simiu
Estimates of the World Trade Center (WTC) towers response to wind by two North American wind engineering laboratories differed from each other by almost 40 %. A recent investigation by the National Institute of Standards and Technology determined that

Impact of UV irradiation on multiwall carbon nanotubes in nanocomposites: formation of entangled surface layer and mechanisms of release resistance

January 31, 2017
Author(s)
Tinh Nguyen, Elijah J. Petersen, Bastien T. Pellegrin, Justin M. Gorham, Thomas F. Lam, Minhua Zhao, Li Piin Sung
Carbon nanotubes (CNTs) are increasingly used in consumer and structural polymeric products to enhance a variety of properties. Under weathering, the polymer matrix will degrade and the nanofillers will potentially be released from the products, which

Performance Data from the NIST Net-Zero Energy Residential Test Facility

January 17, 2017
Author(s)
William M. Healy, Arthur H. Fanney, Brian P. Dougherty, Lisa C. Ng, William V. Payne, Tania Ullah, Farhad Omar
Data were collected over two separate year-long test periods at the Net-Zero Energy Residential Test Facility, a laboratory that is designed to evaluate a variety of technologies and operational strategies that lead to energy efficient houses with

Online Airtightness Calculator for the US, Canada and China

December 15, 2016
Author(s)
Som Shrestha, Lisa Ng, Steven Emmerich, Diana Hun, Laverne Dalgleish
The contribution of air leakage to heating and cooling loads has been increasing as the thermal resistance of building envelopes continues to improve. Easy-to-access data are needed to convince building owners and contractors that enhancing the

A Tool for Evaluating Fault Detection and Diagnostic Methods for Fan Coil Units

December 6, 2016
Author(s)
Shokouh Pourarian, Jin Wen, Daniel Veronica, Amanda Pertzborn, Xiaohui Zhou, Ran Liu
Dynamic simulation software tools are needed for the research and development of improved methods for automatic control and automated fault detection and diagnosis of heating, ventilation, and air conditioning (HVAC) systems. These tools must generate data
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