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- 2015 Nepal Earthquake (1)
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Articles 1 - 6 of 6
Full-Text Articles in Civil Engineering
Phase Transforming Cellular Materials (Pxcms) Design And Assembly, Nadia N. Aljabi, Pablo Zavattieri, David Restrepo
Phase Transforming Cellular Materials (Pxcms) Design And Assembly, Nadia N. Aljabi, Pablo Zavattieri, David Restrepo
The Summer Undergraduate Research Fellowship (SURF) Symposium
We introduce a new class of phase transforming cellular materials (PXCMs) based on locally bistable or metastable unit cells that form periodic microstructures, where the thermomechanical behavior of each unit cell exhibits snap-through type behavior. We propose to explore the capabilities of these new materials to improve structural resistance to damage caused by natural hazards including PXCM in structural members. The main benefits of this material are that it can absorb energy and is reusable. During the first part of this work, a fabrication method for PXCMs based on the assembly material slotted stripes was explored. The 1D unit cell …
Influence Of Warping On Stress For Restrained Concrete Slabs: For Application To Crcp, Corey M. Beck, W. Jason Weiss, Nathan T. Todd
Influence Of Warping On Stress For Restrained Concrete Slabs: For Application To Crcp, Corey M. Beck, W. Jason Weiss, Nathan T. Todd
The Summer Undergraduate Research Fellowship (SURF) Symposium
Continuously-reinforced concrete pavement (CRCP) is widely used in transportation system because of its low maintenance requirement. However, the need for large volumes of steel creates a high cost for new construction. The Illinois Tollway is preparing to substantially renovate highways in and around Chicago and this work seeks to understand how concretes of varying mixture designs can be made thinner by reducing the amount of built-in stress. The experiment examines warping in beams subjected to various degrees of restraint, in an effort to assess effectiveness at reducing warping in continuously reinforced concrete pavements. Value added methodologies such as internal curing …
Role Of Soil Parameters On Loading Of Buried Structures, Xiao Zhang, Mark D. Bowman, Rafael R. Armendariz Briones
Role Of Soil Parameters On Loading Of Buried Structures, Xiao Zhang, Mark D. Bowman, Rafael R. Armendariz Briones
The Summer Undergraduate Research Fellowship (SURF) Symposium
Load rating is the process to evaluate and explore the structural capacity of bridges as much as possible within safety range. As a balance between economy and safety, proper load ratings save money and keep public safe. Knowing the contribution and interaction of each different soil parameter on the loading can significantly reduce the amount of work when load rating those structures. However, for buried structures without plans, such contribution or interaction is never known. This parametric study explores how much each soil parameter of three types of soils can affect the loading of buried structures without plans. An existing …
Seismic Vulnerability Assessment Of Low-Rise Reinforced Concrete Buildings In Kathmandu, Nepal, Prateek Pratap Shah, Santiago Pujol
Seismic Vulnerability Assessment Of Low-Rise Reinforced Concrete Buildings In Kathmandu, Nepal, Prateek Pratap Shah, Santiago Pujol
The Summer Undergraduate Research Fellowship (SURF) Symposium
In seismically active cities like Kathmandu, there often exists a need to assess the seismic vulnerability of a large number of poorly designed buildings within a short period of time. Traditional analysis techniques do not work because they require building data that are either inaccurate or unavailable. One alternative to traditional analysis techniques is to use simple correlations like the Priority Index. This index uses basic building information such as floor area, column area, and wall area to estimate the seismic vulnerability of a building. Following the 2015 Nepal earthquake, 146 low-rise reinforced concrete buildings were surveyed in Kathmandu, Nepal. …
Examining The Hydration And Mechanical Properties Of Cement Paste Containing Cellulose Nanocrystals, Yvette Valadez-Carranza, Charles Y. Chiu, W. Jason Weiss, Pablo Zavattieri, Jeffrey P. Youngblood
Examining The Hydration And Mechanical Properties Of Cement Paste Containing Cellulose Nanocrystals, Yvette Valadez-Carranza, Charles Y. Chiu, W. Jason Weiss, Pablo Zavattieri, Jeffrey P. Youngblood
The Summer Undergraduate Research Fellowship (SURF) Symposium
Cellulose nanocrystals (CNCs) are a nano-scaled particulae material that has been shown to improve strength in cementitious pastes. One advantage of CNCs compared to other nano-materials is that CNCs are renewable and sustainable. The objective of this investigation is to investigate the influence of additional alkali content on the behavior of CNCs in cement paste. This work evaluates flexural and compressive strength as a function of heat of hydration—which measures the extent of reaction. Previous mechanical tests on cement paste containing cellulose nanocrystals (CNCs) have shown CNCs to improve the flexural strength of cement paste by approximately 30%. Isothermal calorimetry …
Approach To Increasing Indiana Rural Road Safety On Intersections, Ammanuiel A. Kebede, John E. Haddock
Approach To Increasing Indiana Rural Road Safety On Intersections, Ammanuiel A. Kebede, John E. Haddock
The Summer Undergraduate Research Fellowship (SURF) Symposium
In 2009, there were more than 17,000 reported fatal crashes in rural areas of United States which accounted 56 percent of total fatal crashes. This number has not declined in a significant amount since 2009. Studies are undergoing on these rural area roadways, including intersections, to identify the major causes and take the necessary countermeasure. By using previous intersection related fatal and injury crash data, it is possible to identify high-risk intersections to point out and make the appropriate improvement. Five year fatal and injury crash data was collected (2008-2012) for three Indiana rural counties that had the highest frequency …