Twisted Buildings: Concepts And Approaches,
2021
5th Level Student, Faculty of Architecture - Design & Built Environment, Beirut Arab University, Lebanon
Twisted Buildings: Concepts And Approaches, Amani Marmar, Sally Zouia, Sahar Ismail, Ahmad Hallik
Architecture and Planning Journal (APJ)
With the emerging of new technologies, the look for more sustainable towers appears. Through designing twisted towers, an aerodynamic and energy efficient structure can be made to reduce materials and wind loads towards it. By definition, a twisted building is one that has gradually rotating floor plates along its height. The problem here rises due to the risk of structural failure and lack of load transfer and unorganized interior function. Thus, this research aims to detect the design solutions used to execute the twisted buildings achieving stability, safety, and withstanding climatic effects. In order to accomplish the mentioned aim, the …
Potentials Of Containers In Creating Modular Architectural Spaces,
2021
5th Level Student, Faculty of Architecture - Design & Built Environment, Beirut Arab University, Lebanon
Potentials Of Containers In Creating Modular Architectural Spaces, Karim Al-Khatib, Jinan Makkawi, Ali Kobeissi
Architecture and Planning Journal (APJ)
Containers are currently considered as one of the inventive trends of framing architectural objects. Container architecture is defined as the type of architecture that is characterised by the usage of steel containers as a structural elements and architectural envelope that can be presented as a part of architecture or a function that an activity can happen in it. Due to the specific dimensions that the container has, architects tend to use it to obtain modularity in their projects and the modular design strategies refer to using the containers as a standard unit to carry out the process, these containers are …
3d Printed Concrete & Polymer Concrete For Infrastructure Applications,
2021
University of New Mexico
3d Printed Concrete & Polymer Concrete For Infrastructure Applications, Daniel Heras Murcia
Civil Engineering ETDs
Additive manufacturing technology has been established as one of the fastest-growing building technologies worldwide. Three-dimensional concrete printing (3DCP) has developed an increasing interest in the last decade due to its prospects as a transformative technology for industries such as the concrete precast. Besides the improvements in automation technologies in construction, traditional construction has faced considerable challenges: high accident rates, labor dependency, significant potential for automation, and high costs associated with the use of traditional formwork. In this context, three-dimensional concrete, also referred to as physical prototyping, is a novel construction technique in which the concrete is extruded layer-to-layer. 3DCP is …
Simulation For A Mems-Based
Ctrnn Ultra-Low Power
Implementation Of Human Activity
Recognition,
2021
Texas A&M University
Simulation For A Mems-Based Ctrnn Ultra-Low Power Implementation Of Human Activity Recognition, Muhammad Emad-Ud-Din, Mohammad H. Hasan, Roozbeh Jafari, Siavash Pourkamali, Fadi M. Alsaleem
Durham School of Architectural Engineering and Construction: Faculty Publications
This paper presents an energy-efficient classification framework that performs human activity recognition (HAR). Typically, HAR classification tasks require a computational platform that includes a processor and memory along with sensors and their interfaces, all of which consume significant power. The presented framework employs microelectromechanical systems (MEMS) based Continuous Time Recurrent Neural Network (CTRNN) to performHAR tasks very efficiently. In a real physical implementation, we show that the MEMS-CTRNN nodes can perform computing while consuming power on a nano-watts scale compared to the micro-watts state-of-the-art hardware. We also confirm that this huge power reduction doesn’t come at the expense of reduced …
A Proposal To Harmonize Bim And Iot Data Silos Using Blockchain Application,
2021
Technological University Dublin
A Proposal To Harmonize Bim And Iot Data Silos Using Blockchain Application, Zulkefly Abu Bakar, Malachy Mathews Dr
Conference papers
The integration of Building Information Modelling (BIM) and Internet of Things (IoT) provide significant end-to-end benefits for the architecture, engineering, construction, and operations (AECO) industry. Example applications include on-site assembly services, data localization for built environment, occupancy performance measures and many other analyses that can be used to improve the built environment. However, silos in the BIM and IoT data exchange have impacted the digital process adoption in AECO industry, which aims to change the dynamics and behaviors of the current working process. Penzes, (2018) in his report, acknowledges the AECO industry as one of the most fragmented sectors with …
Framework To Develop Time- And
Voltage-Dependent Building Load Profiles
Using Polynomial Load Models,
2021
National Renewable Energy Laboratory
Framework To Develop Time- And Voltage-Dependent Building Load Profiles Using Polynomial Load Models, Andrew Parker, Mhd Anas Alkrch, Kevin James, Ahmad Almaghrebi, Mahmoud Alahmad
Durham School of Architectural Engineering and Construction: Faculty Publications
The power consumption of buildings over the course of each minute, hour, day and season plays a major role in how this load influences the Electric Power System voltage and frequency, and vice versa. This consumption is based on the building's load component types, efficiencies, and how they consume power and react to changes in real time. Due to this complexity, standard full-building load models are typically voltage-invariant. This paper proposes a novel framework to transform these voltage-invariant building load models into fully time- and voltage-dependent load profiles using available data on the voltage sensitivity of individual load components. While …
A Case Study To Quantify Variability
In Building Load Profiles,
2021
1National Renewable Energy Laboratory
A Case Study To Quantify Variability In Building Load Profiles, Andrew Parker, Sam Moayedi, Kevin James, Dongming Peng, Mahmoud Alahmad
Durham School of Architectural Engineering and Construction: Faculty Publications
Recent technology development and penetration of advanced metering infrastructure (AMI), advanced building control systems, and the internet-of-things (IoT) in the built environment are providing detailed information on building operation, performance, and user's comfort and behavior. Building owners can obtain a wide range of energy consumption details at various levels of time granularity to augment their decisions as they manage the building operation and interact with the grid. AMI data are providing a new level of detail and visibility that may enhance building services and assets in the smart grid domain and make buildings inch closer to becoming a grid-interactive energy …
Introduction To Prefabrication And Automation In Construction,
2021
Purdue University
Introduction To Prefabrication And Automation In Construction, Luciana Debs, Jiansong Zhang, Yunfeng Chen
Bowen School of Construction Open Educational Resources
New developments and recent advances in construction methods have the potential to change the future of the architecture, engineering and construction industry. Prefabrication, along with modular construction, provides a safe and controlled environment for the production of building construction elements and raises the need for improved collaboration and coordination from design to manufacturing and from transportation to final assembly. Prefabrication also provides relief from the skilled construction labor shortage while opening up new opportunities for mass customization within the building industry. Prefabrication and modular construction automation are emerging expansion routes for the construction industry. In addition, integral to developing the …
Building Services Engineering September/October 2021,
2021
Technological University Dublin
Building Services Engineering September/October 2021
Building Services Engineering
No abstract provided.
Prefabrication In Buildings With Focus On Emerging Mep Rack Systems,
2021
Michigan State University
Prefabrication In Buildings With Focus On Emerging Mep Rack Systems, Mark Daniels, M.G. Matt Syal
The Professional Constructor
The growth in technology and automation has influenced the construction industry to explore prefabrication alternatives in building design and construction. In addition, the shortage of skilled labor is accelerating the push for the adoption of prefabrication in building industry. This paper provides an overview of the present construction market and labor trends and summarizes various levels and categories of prefabrication. It then provides detailed information on an emerging MEP prefabricated solution known as the MEP rack systems. The implementation of the MEP rack systems is discussed with the help of a hospital case study project. It concludes with the discussion …
Case Study Of Using Unmanned Aircraft Systems To Support Bridge Inspections,
2021
Clemson University
Case Study Of Using Unmanned Aircraft Systems To Support Bridge Inspections, Joseph M. Burgett, Gurcan Comert
The Professional Constructor
This paper presents the results of a case study conducted to evaluate the potential benefit of unmanned aircraft systems (UAS), commonly referred to as drones, as a tool to improve the bridge inspection workflow. The study conducted two experiments to determine how well deficiencies could be detected using a UAS. Both experiments were conducted using the same test bridge. The first experiment was carried out by the bridge inspection engineers (BIEs), who had previously inspected the bridge using traditional methods. They used the drone to search for inspection points identified in the inspection report. The second experiment was conducted by …
Stick Built Vs. Panelize Wall/Truss Framing For New Home Construction: A Time Study Labor Comparison.,
2021
University of Denver
Stick Built Vs. Panelize Wall/Truss Framing For New Home Construction: A Time Study Labor Comparison., Eric A. Holt, Jim Anzlovar, Alexander Welsh
The Professional Constructor
Due to many trends in the construction industry (material cost increase, labor shortages, supply chain issues, pandemic, market demand outpacing supply), the homebuilding industry is looking for alternative ways to frame homes. In response to the National Housing Endowment (NHE) Request for Proposal, the researchers reviewed the literature on the housing market’s current state regarding the scale and scope of the skilled construction framers shortage and the current market share of single-family framing method; stick-built vs. panelization. Working with industry part ners, the team analyzed time studies for multiple new home builds. It was found that panelized wall framing systems …
Minority And Female Participation In Construction Industry Apprenticeship Programs,
2021
University of Central Missouri
Minority And Female Participation In Construction Industry Apprenticeship Programs, Richard Bruce, Aaron Sauer, Patrick Sells, Curtis Bradford
The Professional Constructor
According to the U.S. Bureau of Labor Statistic’s Current Population Survey, nearly 90 percent of the 10.7 million people employed in the construction industry are white males (2021). This statistic will remain unchanged unless more minorities and females are recruited into the industry. For craft workers, a primary recruitment mechanism is the registered apprenticeship program. This study analyzes the U.S. Department of Labor’s Registered Apprenticeship Database (RAPIDs) from 2000 to 2019 to identify trends for new apprentices. The study found that there was no change in the proportion of new female apprentices in the previous 20 years and no change …
Evaluation Of In-Cab Air Quality For Nonroad Diesel Construction Equipment,
2021
Texas A&M University
Evaluation Of In-Cab Air Quality For Nonroad Diesel Construction Equipment, Phil Lewis, Sherif El Khouly, Adam Mayer, Jeremy Johnson
The Professional Constructor
Previous research indicates that air quality near the cabs of nonroad diesel equipment may exceed recommended exposure limits for certain pollutants. The objective of this case study was to collect and analyze air pollutant data near the cabs of nonroad diesel equipment while performing real world activities. Using state-of-the-art instrumentation, the research team conducted 24 tests on nine different items of nonroad equipment. The team collected data related to pollutant concentrations of carbon monoxide, carbon dioxide, nitric oxide, nitrogen dioxide, particulate matter, and black carbon. Average concentrations of carbon monoxide and nitric oxide did not exceed published exposure limits on …
Digital Construction And Bim Research In Ireland 2016-2020,
2021
Technological University Dublin
Digital Construction And Bim Research In Ireland 2016-2020, Barry Mcauley, Roger P. West, Alan V. Hore
Conference papers
As the construction industry opens up post pandemic, new and significant challenges will demand considerable expertise, not least in financial viability, solving the housing crisis and facing the very significant climate change pressures to make the industry less wasteful and less carbon intensive. This presents an excellent opportunity to further inculcate aspects of lean construction, particularly BIM into many aspects of construction not traditionally associated with digital construction, provided the necessary expertise is available and known to exist. Following a well-received recent conference paper summarising BIM-related research published by academics in Ireland’s higher education institutions in 2020, this paper will …
Evaluating Prediction Models Of Creep And Drying Shrinkage
Of Self-Consolidating Concrete Containing Supplementary
Cementitious Materials/Fillers,
2021
University of Nebraska - Lincoln
Evaluating Prediction Models Of Creep And Drying Shrinkage Of Self-Consolidating Concrete Containing Supplementary Cementitious Materials/Fillers, Micheal Asaad, George Morcous
Durham School of Architectural Engineering and Construction: Faculty Publications
Supplementary cementitious materials (SCMs) and fillers play an important role in enhancing the mechanical properties and durability of concrete. SCMs and fillers are commonly used in self-consolidating concrete (SCC) mixtures to also enhance their rheological properties. However, these additives could have significant effects on the viscoelastic properties of concrete. Existing models for predicting creep and drying shrinkage of concrete do not consider the effect of SCM/filler on the predicted values. This study evaluates existing creep and drying shrinkage models, including AASHTO LRFD, ACI209, CEB-FIP MC90-99, B3, and GL2000, for SCC mixtures with different SCMs/fillers. Forty SCC mixtures were proportioned for …
Sullivan Sustainable Housing Unit,
2021
Indiana State University
Sullivan Sustainable Housing Unit, Riem Rostom
2021 Spring Reports (Sullivan)
Students in ENGR401 were tasked with providing recommendations for an energy efficient heating and cooling system for a housing design provided by IAD251. Students performed necessary calculations and compared information with sustainability factors. There are also further recommendations for building sustainable housing.
The Facility Infection Risk Estimator™: A Web Application Tool For Comparing Indoor Risk Mitigation Strategies By Estimating Airborne Transmission Risk,
2021
BranchPattern
The Facility Infection Risk Estimator™: A Web Application Tool For Comparing Indoor Risk Mitigation Strategies By Estimating Airborne Transmission Risk, Marcel Harmon, Josephine Lau
Durham School of Architectural Engineering and Construction: Faculty Publications
The COVID-19 pandemic created needs for (a) estimating the existing airborne risk of infection from SARS-CoV-2 in existing facilities and new designs and (b) estimating and comparing the impacts of engineering and behavioural strategies for contextually reducing that risk. This paper presents the development of a web application to meet these needs, the Facility Infection Risk Estimator™, and its underlying Wells–Riley based model. The model specifically estimates (a) the removal efficiencies of various settling, ventilation, filtration and virus inactivation strategies and (b) the associated probability of infection, given the room physical parameters and number of individuals infected present with either …
Designing Gfrp-Reinforced Tilt-Up Wall Panels,
2021
University of Nebraska-Lincoln
Designing Gfrp-Reinforced Tilt-Up Wall Panels, Fray F. Pozo-Lora, Marc Maguire
Durham School of Architectural Engineering and Construction: Faculty Publications
Tilt-up construction was effectively enabled on a wide scale in 1979, when the ACI committee 551 report on Tilt-up construction was published, the Recommended Tilt-Up Wall Design, aka, the Yellow Book and the subsequent ACI-SEASC Task, aka the Green Book, and another Tilt-up design and construction manual developed by the ACI in 1988. The Tilt-up Concrete Association was created in 1986 by a group of industry professionals who had the need of an organization dedicated to the industry. ACI 551 maintains a document outlining the standard practice for contemporary Tilt-up design and construction. The ACI 551 document does not consider …
Performance Evaluation Of A Prestressed Belitic Calcium
Sulfoaluminate Cement (Bcsa) Concrete Bridge Girder,
2021
Calder Richards Structural Consulting Engineers
Performance Evaluation Of A Prestressed Belitic Calcium Sulfoaluminate Cement (Bcsa) Concrete Bridge Girder, Nick Markosian, Raed Tawadrous, Mohammad Mastali, Robert J. Thomas, Marc Maguire
Durham School of Architectural Engineering and Construction: Faculty Publications
Belitic calcium sulfoaluminate (BCSA) cement is a sustainable alternative to Portland cement that offers rapid setting characteristics that could accelerate throughput in precast concrete operations. BCSA cements have lower carbon footprint, embodied energy, and natural resource consumption than Portland cement. However, these benefits are not often utilized in structural members due to lack of specifications and perceived logistical challenges. This paper evaluates the performance of a full-scale precast, prestressed voided deck slab bridge girder made with BCSA cement concrete. The rapid-set properties of BCSA cement allowed the initial concrete compressive strength to reach the required 4300 psi release strength at …
