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- All Subjects: Building
- Creators: Civil, Environmental and Sustainable Engineering Programs
Description
This dissertation details an attempt to experimentally evaluate the Giroud et al. (1995) concentration factors for geomembranes loaded in tension perpendicular to a seam by laboratory measurement. Field observations of the performance of geomembrane liner systems indicates that tears occur at average strains well below the yield criteria. These observations have been attributed, in part, to localized strain concentrations in the geomembrane loaded in tension in a direction perpendicular to the seam. Giroud et al. (1995) has presented theoretical strain concentration factors for geomembrane seams loaded in tension when the seam is perpendicular to the applied tensile strain. However, these factors have never been verified. This dissertation was prepared in fulfillment of the requirements for graduation from Barrett, the Honors College at Arizona State University. The work described herein was sponsored by the National Science Foundation as a part of a larger research project entitled "NEESR: Performance Based Design of Geomembrane Liner Systems Subject to Extreme Loading." The work is motivated by geomembrane tears observed at the Chiquita Canyon landfill following the 1994 Northridge earthquake. Numerical analysis of the strains in the Chiquita Canyon landfill liner induced by the earthquake indicated that the tensile strains, were well below the yield strain of the geomembrane material. In order to explain why the membrane did fail, strain concentration factors due to bending at seams perpendicular to the load in the model proposed by Giroud et al. (1995) had to be applied to the geomembrane (Arab, 2011). Due to the localized nature of seam strain concentrations, digital image correlation (DIC) was used. The high resolution attained with DIC had a sufficient resolution to capture the localized strain concentrations. High density polyethylene (HDPE) geomembrane samples prepared by a leading geomembrane manufacturer were used in the testing described herein. The samples included both extrusion fillet and dual hot wedge fusion seams. The samples were loaded in tension in a standard triaxial test apparatus. to the seams in the samples including both extrusion fillet and dual hot wedge seams. DIC was used to capture the deformation field and strain fields were subsequently created by computer analysis.
ContributorsAndresen, Jake Austin (Author) / Kavazanjian, Edward (Thesis director) / Gutierrez, Angel (Committee member) / Civil, Environmental and Sustainable Engineering Programs (Contributor) / Barrett, The Honors College (Contributor)
Created2016-05
Description
The Prestige Worldwide Resort and development area will be constructed to the east of Scottsdale Rd and North of the 101 loop. The development area is composed of 442.58 acres of land within 9 parcels. Zoning for this development area consists of commercial, recreational, golf course, residential, and water/wastewater treatment. The main feature of the development area is a luxury resort to be located at the southwest corner of Legacy Blvd and Hayden Rd. The resort includes a large pond over which the entrance road traverses. The resort also includes an 18-hole golf course located just north of Legacy Blvd. The proposed residential area is to the east of Hayden Rd on the northern half of the site. Along the northeastern border of this residential area are APS, SRP, and Bureau of Reclamation easements. A recreational area in the form of a park is proposed to the east and west of the southern portion of N Hayden Rd on the site. The southeast corner or the site is reserved for water and wastewater treatment. The southwest corner of the site is for commercial use with an additional recreational/sporting area just to the north of this commercial area. The key feature of the resort is its luxurious eight-story hotel along with two other hotel buildings that accommodate tourists who are visiting Scottsdale. The main hotel includes 210 rooms to provide enough housing for these tourists and acquire more attraction to Scottsdale. The composition of the hotel consists of the first floor being the lobby and a recreational area. The other floors each contain 30 rooms, 3 elevators, and a staircase. Surrounding the hotel is a parking lot for the hotel guests and people attending events hosted at the hotel. Regarding the hotel specifications, two different alternative designs were produced to determine the ideal steel member type, concrete reinforcement, and the steel frame layout. The final hotel design was determined by which alternative had the lowest structural response from loading and cost effective.
ContributorsCastro, Cesar Aaron (Author) / Fox, Peter (Thesis director) / Templeton, Stephanie (Committee member) / Civil, Environmental and Sustainable Engineering Programs (Contributor, Contributor) / Barrett, The Honors College (Contributor)
Created2017-05
Description
Hospitals constitute 9 percent of commercial energy consumption in the U.S. annually, though they only make up 2 percent of the U.S. commercial floor space. Consuming an average of 259,000 Btu per square foot, U.S. hospitals spend about 8.3 billion dollars on energy every year. Utilizing collaborative delivery method for hospital construction can effectively save healthcare business owners thousands of dollars while reducing construction time and resulting in a better product: a building that has fewer operational deficiencies and requires less maintenance. Healthcare systems are integrated by nature, and are rich in technical complexity to meet the needs of their various patients. In addition to being technologically and energy intensive, hospitals must meet health regulations while maintaining human comfort. The interdisciplinary nature of hospitals suggests that multiple perspectives would be valuable in optimizing the building design. Integrated project delivery provides a means to reaching the optimal design by emphasizing group collaboration and expertise of the architect, engineer, owner, builder, and hospital staff. In previous studies, IPD has proven to be particularly beneficial when it comes to highly complex projects, such as hospitals. To assess the effects of a high level of team collaboration in the delivery of a hospital, case studies were prepared on several hospitals that have been built in the past decade. The case studies each utilized some form of a collaborative delivery method, and each were successful in saving and/or redirecting time and money to other building components, achieving various certifications, recognitions, and awards, and satisfying the client. The purpose of this research is to determine key strategies in the construction of healthcare facilities that allow for quicker construction, greater monetary savings, and improved operational efficiency. This research aims to communicate the value of both "green building" and a high level of team collaboration in the hospital-building process.
ContributorsHansen, Hannah Elizabeth (Author) / Parrish, Kristen (Thesis director) / Bryan, Harvey (Committee member) / Civil, Environmental and Sustainable Engineering Programs (Contributor) / Barrett, The Honors College (Contributor)
Created2017-05