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Full-Text Articles in Engineering
Repairable Precast Bridge Bents For Seismic Events, Kallan Hart
Repairable Precast Bridge Bents For Seismic Events, Kallan Hart
Electronic Theses and Dissertations
Concrete bridge columns are designed to withstand earthquakes by undergoing large displacements. Current seismic bridge codes guarantee collapse prevention, but damage to concrete and longitudinal reinforcement often requires demolition of the structure. Repairable detailing and advanced bridge construction connections may be utilized in concrete bridge columns to allow for quick construction as well as replacement of damaged reinforcement after an earthquake. This detailing may be an attractive alternative to bridge owners to reduce construction and replacement costs as well as ensure the functionality of critical routes after an earthquake. Three repairable precast bridge columns with exposed longitudinal reinforcement were tested …
Development Of A Mechanical Device For Measuring Connection Rotations During Seismic Loading, Garrett Tatum
Development Of A Mechanical Device For Measuring Connection Rotations During Seismic Loading, Garrett Tatum
Civil Engineering Undergraduate Honors Theses
This engineering design project sought to design a cheap and easy-to-use sensor to monitor seismic connection rotations in steel buildings during earthquakes by using a linear ratchet mechanism. The idea for the project goes against the mainstream of research that is seeking to develop complex digital networks for monitoring structures in earthquake regions. Whereas many modern sensor networks require high-cost, professionally maintained digital networks, an analog sensor could provide much of the same information at a fraction of the cost, allowing sensors to be more widely utilized, particularly in developing countries. This project required an iterative engineering design process to …
Utilizing The Hvsr Second Peak For Surface Wave Inversions In The Mississippi Embayment, Ashraf Kamal Himel
Utilizing The Hvsr Second Peak For Surface Wave Inversions In The Mississippi Embayment, Ashraf Kamal Himel
Graduate Theses and Dissertations
Ambient noise data from 24 sites within the Mississippi Embayment were analyzed to estimate the fundamental frequency using the horizontal to vertical spectral ratio (HVSR) method. The fundamental frequency ranged from 0.17 to 3.43 Hz for the tested sites. At seventeen of the sites, a second higher frequency HVSR peak, which ranged from 0.617 Hz to 2.154 Hz, was observed in addition to the fundamental HVSR peak. The second peak frequency in the HVSR curve has been attributed by previous researchers as either an odd harmonic of the fundamental peak or a shallow impedance contrast from the Memphis sand layer …
Seismic Energy Dissipation Of Steel Buildings Using Engineered Cladding Systems, Quan Viet Nguyen
Seismic Energy Dissipation Of Steel Buildings Using Engineered Cladding Systems, Quan Viet Nguyen
Masters Theses 1911 - February 2014
This research examines the seismic energy dissipation potential of steel structures by focusing on new types of specially engineered cladding-to-frame connections. Traditional connection details consist of rigid restraints of cladding panels, resulting in seismic design that only considers the panel self-weight with connection design left up to the precast fabricators and typical details. It is postulated that by considering these elements to actively participate in building response a more efficient and resilient structure could be designed which accurately captures the effects of non-structural cladding elements on building behavior. In this preliminary research, two mechanisms to dissipate seismic energy using engineered …