Abstracts – Browse Results
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Al-Zarrad, M A (2018) Multi-criteria decision-making model to improve linear repetitive projects time-cost trade-off in uncertain environment, Unpublished PhD Thesis, , University of Alabama.
Awolusi, I G (2017) Active construction safety leading indicator data collection and evaluation, Unpublished PhD Thesis, , University of Alabama.
Chau, A D (2018) Conceptual cost estimation decision support system in university construction projects, Unpublished PhD Thesis, , University of Alabama.
Egan, C M (1989) An evaluation of the effectiveness of the Mankato State university construction management program, Unpublished PhD Thesis, , University of Alabama.
Giron Matute, W A (2018) Sustainability analysis for construction companies under the LEED code, Unpublished PhD Thesis, , University of Alabama.
Harbin, K B (2020) A decision analysis tool for building renovations regarding adaptive reuse, Unpublished PhD Thesis, , The University of Alabama.
Hatamleh, M T (2020) Enhancing the management proficiencies in developing countries: The impact of project risk management within a project management maturity model on project performance, Unpublished PhD Thesis, , University of Alabama.
Macdonald, R N (2013) A strategy for materials price risk mitigation, Unpublished PhD Thesis, , The University of Alabama.
Mejia Aguilar, G (2013) Improving accuracy of project outcome predictions, Unpublished PhD Thesis, , University of Alabama.
Nguyen, T T (2017) Modeling of clt creep behavior and real-time hybrid simulation of a clt-lifs building, Unpublished PhD Thesis, , The University of Alabama.
- Type: Thesis
- Keywords: timber; earthquake; integration; migration; variations; experiment; simulation
- ISBN/ISSN:
- URL: https://www.proquest.com/docview/2019099182
- Abstract:
CLT-LiFS is an innovative hybrid structural system. This type of structure has emerged as a promising structural system for mid-rise to tall wood buildings in the seismic areas. CLT-LiFS is made by integrating post-tensioned Cross Laminated Timber (CLT) panels with Light Frame Wood Systems (LiFS). The post-tensioned CLT panels can provide excellent load bearing and self-centering capacity. And the LiFS can dissipate a large amount of energy through the slip of fasteners when it deforms. The behaviors of CLT-LiFS have been studied through a series of experimental tests under cyclic loading protocols and earthquake motions at different hazard levels using real-time hybrid simulations. Results from the experimental tests showed that the CLT-LiFS performed well under MCE (Maximum Considered Earthquake) hazard level with the maximum drift less than 1%. To obtain a good self-centering performance, the post-tensioned tendon force in CLT panels needs to be maintained at a desired level in long-term until the earthquake hits. Under the creep behavior, the post-tensioned force in the tendon will reduce as a function of time and moisture content in CLT panels. In this dissertation, a moisture content diffusion model was introduced by applying Fick’s law to estimate the moisture content migration in CLT panels under the variation of environmental relative humidity. A numerical model combined with data from a series of moisture content experiments were used to obtain the moisture content diffusion coefficients for CLT material. The four-element creep model was also proposed. This creep model could predict the creep deformation of CLT panels versus time under variations of ambient environmental conditions. A 3D finite element model (FEM) was developed with an integration of the creep and moisture content diffusion model to predict the tendon force of post-tensioned CLT panels versus time. This FEM model was used to predict the loss of tendon force in CLT panels. This tendon force loss did not include the instant loss at the beginning due to anchor slip or other factors.
Ogunrinde, O (2020) Enhancing quality management in highway construction using emerging methods, Unpublished PhD Thesis, , University of Alabama.
Okpala, I U (2022) Robotics and automation in construction: Developing foundational insight and tools to support safe implementation, Unpublished PhD Thesis, , University of Alabama.
Premraj, P (2017) Assessment of project controls for shutdowns/turnarounds/outages, Unpublished PhD Thesis, , University of Alabama.
Shen, X (2017) Location-based leading indicators in BIM for construction safety, Unpublished PhD Thesis, , University of Alabama.
Song, S (2017) Construction equipment travel path visualization and productivity evaluation, Unpublished PhD Thesis, , University of Alabama.
Stone, M L C (2013) Development of unit cost estimating models with respect to scale economies and material price volatility for use in probabilistic life cycle cost analyses, Unpublished PhD Thesis, , University of Alabama.
Thomas, W K (2013) The impact of RFP phase project scope development on the successful outcome of construction projects using the design build project delivery method, Unpublished PhD Thesis, , University of Alabama in Huntsville.
Watson, S V (2010) Pre-disaster planning for transportation infrastructure recovery, Unpublished PhD Thesis, , The University of Alabama at Birmingham.