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Articles 1 - 12 of 12
Full-Text Articles in Construction Engineering and Management
The Current State Of Practice Of Building Information Modeling, Kevin P. Brooks
The Current State Of Practice Of Building Information Modeling, Kevin P. Brooks
Masters Theses
Building Information Modeling (BIM) has become extremely prominent in the construction industry in the past twenty years. It serves as a digital repository that can, when used to its fullest potential, combine all aspects of designing, building, and managing a structure in one place, alongside all the data produced in those processes. The construction industry has to date struggled to increase productivity alongside similar fields, such as the manufacturing industry, though the construction industry generally has far more stakeholders on one project than the manufacturing industry. Further, building designs are becoming more complex while project schedules are becoming tighter. As …
Construction And Materials Best Practices For Concrete Sidewalks: Phase Ii - Long-Term Performance And Hot Weather Placement Effects, Kara Peterman, Sergio Brena, Likhitha Rudraraju, Brian Shea
Construction And Materials Best Practices For Concrete Sidewalks: Phase Ii - Long-Term Performance And Hot Weather Placement Effects, Kara Peterman, Sergio Brena, Likhitha Rudraraju, Brian Shea
Structural Engineering and Mechanics Research Reports
This report summarizes the investigation of construction practices and materials to develop durable concrete sidewalks which can resist scaling damage caused by exposure to freezing environment and deicer application. Over 16 months, a field study accompanied by laboratory testing was conducted to identify factors that affect the performance and durability of sidewalks. The variables considered for the study are concrete mix design, placement and finishing practices, curing methods, and deicer application. The placement of the sidewalks took place in late July 2021, to investigate the impact of hot weather concreting practices on the performance of sidewalks. Forty-eight sidewalk panels were …
Influence Of Foundation Damping On Offshore Wind Turbine Monopile Design Loads, Wystan Carswell, Sanjay R. Arwade, Jörgen Johansson, Don J. Degroot
Influence Of Foundation Damping On Offshore Wind Turbine Monopile Design Loads, Wystan Carswell, Sanjay R. Arwade, Jörgen Johansson, Don J. Degroot
Publications
The dynamic behavior of offshore wind turbines (OWTs) must be designed considering stochastic load amplitudes and frequencies from waves and mechanical loads associated with the spinning rotor during power production. The proximity of the OWT natural frequency to excitation frequencies combined with low damping necessitates a thorough analysis of sources of damping; of these sources of damping, least is known about the contributions of damping from soil-structure interaction (foundation damping). This paper studies the influence of foundation damping on cyclic load demand for monopile-supported OWTs considering the design situations of power production, emergency shutdown, and parked conditions. The NREL 5 …
Umass Amherst Case Studies – Campus Center Plaza & Lederle Graduate Research Center, Elliott Hambrook
Umass Amherst Case Studies – Campus Center Plaza & Lederle Graduate Research Center, Elliott Hambrook
UMassBRUT Community
This presentation discusses Gale’s recent experience with repair projects at two (2) brutalist structures on the Amherst Campus at UMass. A board-formed concrete retaining wall at the base of the Murray D. Lincoln Campus Center (Marcel Breuer, 1970) was tastefully modified, but retained, as part of a waterproofing replacement project, addressing water infiltration and improving sight lines across the Campus Center Plaza. The panelized precast concrete façades of the John W. Lederle Graduate Research Center (Campbell, Aldrich, & Nulty, 1969) received new exterior sealants, enlarged panel joints, PCB removal and encapsulation, supplemental panel anchorage, and a waterproof coating.
Estimation Of Suspended Sediment Concentration From Remote Sensing And In Situ Measurement Over Lake Tana, Ethiopia, Zelalem R. Womber, Fasikaw A. Zimale, Mebrahtom G. Kebedew, Bekalu W. Asers, Nikole M. Deluca, Christian D. Guzman, Seifu A. Tilahun, Benjamin F. Zaitchik
Estimation Of Suspended Sediment Concentration From Remote Sensing And In Situ Measurement Over Lake Tana, Ethiopia, Zelalem R. Womber, Fasikaw A. Zimale, Mebrahtom G. Kebedew, Bekalu W. Asers, Nikole M. Deluca, Christian D. Guzman, Seifu A. Tilahun, Benjamin F. Zaitchik
Civil and Environmental Engineering Faculty Publication Series
Discharge from basins joining a lake is the main factor determining the lake volume and sediment inflow to the lake. Suspended sediment is an important parameter for describing the water quality of aquatic ecosystems. Lake Tana is an important and the largest lake in Ethiopia for the local ecological system. However, environmental change and anthropogenic activities in the area threaten its water quality. The conventional methods of suspended sediment concentration (SSC) observation are unable to determine and compare spatial and temporal SSC patterns for the lake over a period of years. Remote sensing methods have made it possible to map …
Computational Modeling Of Laminated Veneer Bamboo (Lvb) Dowel Joints, Niloufar Khoshbakht
Computational Modeling Of Laminated Veneer Bamboo (Lvb) Dowel Joints, Niloufar Khoshbakht
Doctoral Dissertations
Laminated veneer bamboo (LVB) is a sustainable building material that has been gaining interest in the construction industry of late. As a relatively new product, little is known about its connection performance, specifically, its failure behavior in dowel type joints and possible similarities it may have to engineered wood products in terms of failure mechanisms. Research is needed to aid in the understanding of LVB dowel connection failure behavior and to quantify the failure mechanism and key factors associated with LVB dowel connection strength. Modeling, as conducted in this research, is a valuable tool to help devise safe standards and …
Analyses Of Densely Crosslinked Phenolic Systems Using Low Field Nmr, Jigneshkumar Patel
Analyses Of Densely Crosslinked Phenolic Systems Using Low Field Nmr, Jigneshkumar Patel
Doctoral Dissertations
A uniform dispersion of reactants is necessary to achieve a complete reaction involving multi-components, especially for the crosslinking of rigid high-performance materials. In these reactions, miscibility is crucial for curing efficiency. This miscibility is typically enhanced by adding a third component, a plasticizer. For the reaction of the highly crystalline crosslinking agent hexamethylenetetramine (HMTA) with a strongly hydrogen-bonded phenol formaldehyde resin, furfural has been traditionally used as the plasticizer. However, the reason for its effectiveness is not clear. In this doctoral thesis work, miscibility and crosslinking efficiency of plasticizers in phenolic curing reactions are studied by thermal analysis and spectroscopic …
Wood Studio Workshop, Peggi Clouston, Rommel L Cordova‐Fiori
Wood Studio Workshop, Peggi Clouston, Rommel L Cordova‐Fiori
Science and Engineering Saturday Seminars
No abstract provided.
Integrated Urban Metabolism Analysis Tool (Iumat), Nariman Mostafavi
Integrated Urban Metabolism Analysis Tool (Iumat), Nariman Mostafavi
Doctoral Dissertations
A number of tools are available today for simulating different aspects of urban activity, but these efforts are fragmented and do not effectively reflect the interrelationships between very diverse groups of urban sectors and resource flows. There is a critical need for robust and reliable urban metabolism analysis tools that integrate socio-economic elements of urbanization and physicality of the built environment into evaluating sustainability in cities. This dissertation outlines the development of an Integrated Urban Metabolism Analysis Tool (IUMAT) that dynamically measures the environmental impacts of land cover, transportation, and consumption of energy, water and materials employing a holistic framework. …
Driver Behavior Evaluation Of Variable Speed Limits And A Conceptual Framework For Optimal Vsl Location Identification, Curt P. Harrington
Driver Behavior Evaluation Of Variable Speed Limits And A Conceptual Framework For Optimal Vsl Location Identification, Curt P. Harrington
Masters Theses
Static speed limits are the norm across the world’s roadway networks. However, advances in technology and increased applications in intelligent transportation systems (ITS) provide a mechanism for upgrading traditional speed limits into an active traffic management system. More specifically, variable speed limits (VSLs) can be used in high crash severity locations and in real-time congestion and weather events to increase traffic safety and operations. Much of the available literature on VSLs focuses upon crash prediction algorithms for VSLs, simulations, and effectiveness of real-world VSL implementations. One noticeable gap in the existing literature is related to driver compliance under varied configurations …
Umass Amherst Green Building Guidelines 2013, Ludmilla Pavlova-Gillham, Ted Mendoza, Ezra Small, Patricia O'Flaherty, Nariman Mostafavi, Mohamed Farzinmoghadam, Somayeh Tabatabaee Pozveh
Umass Amherst Green Building Guidelines 2013, Ludmilla Pavlova-Gillham, Ted Mendoza, Ezra Small, Patricia O'Flaherty, Nariman Mostafavi, Mohamed Farzinmoghadam, Somayeh Tabatabaee Pozveh
Campus Planning Reports and Plans
Facilities & Campus Services, Sustainable UMass and Campus Planning support sustainability and energy conservation initiatives by providing in-house resources to campus staff as well as designers and contractors working with the University. The UMass Amherst Green Building Guidelines provide a framework for approaching new construction and major renovation projects at UMass Amherst that are undergoing LEED certification by focusing the conversation on green building aspects that are most important to the campus. They are intended to be the beginning of a dynamic conversation between designers, environmental consultants and constructors, university stakeholders, and users of new high performance buildings.
Interfacial Strength Between Prestressed Hollow Core Slabs And Cast-In-Place Concrete Toppings, Ryan M. Mones
Interfacial Strength Between Prestressed Hollow Core Slabs And Cast-In-Place Concrete Toppings, Ryan M. Mones
Masters Theses 1911 - February 2014
The horizontal shear strength of the interface between prestressed concrete hollow core slabs and cast-in-place concrete topping slabs was evaluated through a set of 24 push-off experiments. The push-off test specimens featured segments of dry-mix and wet-mix hollow core slabs with a variety of surface treatments including machine finished, sandblasted, broom roughened, rake roughened and grouted. A cast-in-place slab was poured on top of the hollow core specimens to form a 15 inch by 15 inch interface between the two materials. Results indicate the average horizontal shear strength of the push-off specimens was 227 psi. Higher shear strength and slip …