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2021

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Articles 151 - 162 of 162

Full-Text Articles in Structural Engineering

Structural Robustness Of Long-Span Cable-Supported Bridges, Qian Chen Jan 2021

Structural Robustness Of Long-Span Cable-Supported Bridges, Qian Chen

Dissertations and Theses

As a critical part of the current infrastructure system, long-span bridges are directly exposed to adverse environments, such as floods, scours, hurricanes, etc., and dynamic loads such as earthquakes and vehicular impacts. Additionally, recent long-span cable-supported collapse examples show that many bridges suffered progressive collapse when local damage occurred, and they are highly vulnerable to severe damages in the event of a localized failure. However, the traditional design approaches are unable to provide explicit measures of residual safety of bridges, especially after an abnormal event. Currently available redundancy and robustness evaluation approaches, which were developed mainly for short-span bridges, are …


Seismic Performance Of Mechanically Spliced Precast Bridge Columns With New Couplers, Evan Greeneway Jan 2021

Seismic Performance Of Mechanically Spliced Precast Bridge Columns With New Couplers, Evan Greeneway

Electronic Theses and Dissertations

Lap splicing is not always the most economical or practical approach to achieve reinforcement bar continuity. Mechanical bar splices, or bar couplers, are one alternative that may be far more practical. Currently, the US codes do not allow for the use of bar couplers in the plastic hinge region for RC members in areas of high seismic activity. There has not been enough research into the couplers behavior when subjected to significant inelastic lateral deformations. The Lohr Structures Laboratory was used to conduct an experimental study on campus of South Dakota State University to evaluate the seismic performance of mechanically …


A Critical Analysis Of How Large Irish Architectural Practices Responded To Initial Covid-19 Restrictions And The Affect Implementing Remote Working Had On Bim Processes, Policies, And People, Bim Tudublin, John Mcenroy Jan 2021

A Critical Analysis Of How Large Irish Architectural Practices Responded To Initial Covid-19 Restrictions And The Affect Implementing Remote Working Had On Bim Processes, Policies, And People, Bim Tudublin, John Mcenroy

Capstone Reports

The unprecedent events which transpired in the 88-day period from the 31st of December 2019 to the 27th of March 2020 have changed the world in which we live and work. The outbreak of Coronavirus disease 19 (COVID-19) and the ensuing pandemic which has evolved are descripted as one in a hundred-year events. This paper researched and critically analyses the operations which large Irish Architecture firms initiated during this period in order to facilitate the ability of its employees working from a remote location, focusing on how the People, Processes and Policies of BIM (3 Ps of BIM); adapted to …


To What Extent Can Lean Construction Processes And Principles Be Utilised In The Design Stage Of A Bim Project In The Irish Design And Construction Industry, Bim Tudublin, Barry Sheramn Jan 2021

To What Extent Can Lean Construction Processes And Principles Be Utilised In The Design Stage Of A Bim Project In The Irish Design And Construction Industry, Bim Tudublin, Barry Sheramn

Capstone Reports

Although different in many ways, Building Information Modelling (BIM) and Lean Construction are two processes that are having a significant impact on the Design & Construction Industry. In recent years, the Irish AECO industry has seen a tenfold increase across numerous construction disciplines with the adoption of new workflows and processes centred around both BIM and Lean methodologies. Existing literature identifies a strong synergistic relationship between the two processes and highlights the opportunity for Lean processes and principles to be implemented into the design stage workflow. This paper investigated existing literature relating to several lean processes currently implemented in the …


An Examination Of The Use Of Geotechnical Bim To Provide Value Engineering Solutions For Coastal Infrastructure., Bim Tudublin, Eric Brennan Jan 2021

An Examination Of The Use Of Geotechnical Bim To Provide Value Engineering Solutions For Coastal Infrastructure., Bim Tudublin, Eric Brennan

Capstone Reports

The digitisation of construction is taking root as Building Information Modelling is becoming more prevalent across the industry. From an Irish context, the adoption rate of BIM has been slow; nationally its advantages and merits have been welcomed and the appropriate government support is either available, soon to be implemented or in the early conceptual stage. Within the Irish governments Project Ireland 2040 framework there are significant infrastructure developments looming ahead, in particular regarding ports and harbours. The importance of this type of infrastructure is only further compounded due to the UK’s departure from the EU and the need for …


Optimisation Of Retrofit Wall Insulation: An Irish Case Study, Rakshit D. Muddu, D M. Gowda, Anthony James Robinson, Aimee Byrne Jan 2021

Optimisation Of Retrofit Wall Insulation: An Irish Case Study, Rakshit D. Muddu, D M. Gowda, Anthony James Robinson, Aimee Byrne

Articles

Ireland has one of the highest rates of emissions per capita in the world and its residential sector is responsible for approximately 10% of total national CO2 emissions. Therefore, reducing the CO2 emissions in this sector will play a decisive role in achieving EU targets of reducing emissions by 40% by 2030. To better inform decisions regarding retrofit of the existing building stock, this study proposes Optimum Insulation Thicknesses (OIT) for typical walls in 25 regions in Ireland. The calculation of OIT includes annual heat energy expenditure, CO2 emissions, and material payback period. The approach taken is based on Heating …


A Critical Analysis Of The Application Of Visual Programming To Increase Efficiency In Bim Object Metadata Delivery Workflows During The Delivery Phase Of An Asset, Kieran Lakhera O'Shea, Davitt Lamon Jan 2021

A Critical Analysis Of The Application Of Visual Programming To Increase Efficiency In Bim Object Metadata Delivery Workflows During The Delivery Phase Of An Asset, Kieran Lakhera O'Shea, Davitt Lamon

Reports

Uniclass 2015 data generally seems to be overlooked in favour of the more valuable COBie data when discussion begins about BIM model metadata and, at present, few studies are devoted to it and its delivery through automated methodologies. Classification is a key part of the BIM process – without the ability to distinguish one object from another a BIM model lacks the definition required for implementing downstream applications such as functional simulations, compliance checking and other automated technologies. The use of classification data is, of course, not the only way of identifying objects but it is currently the only standardised …


Inspire Newsletter Spring 2021, Missouri University Of Science And Technology. Inspire - University Transportation Center Jan 2021

Inspire Newsletter Spring 2021, Missouri University Of Science And Technology. Inspire - University Transportation Center

INSPIRE Newsletters

No abstract provided.


Inspire Newsletter Fall 2021, Missouri University Of Science And Technology. Inspire - University Transportation Center Jan 2021

Inspire Newsletter Fall 2021, Missouri University Of Science And Technology. Inspire - University Transportation Center

INSPIRE Newsletters

No abstract provided.


Axial Performance Of Self-Consolidating Concrete-Filled Fiber Tubes, Joshua David Carter Jan 2021

Axial Performance Of Self-Consolidating Concrete-Filled Fiber Tubes, Joshua David Carter

Masters Theses

"Concrete filled fiber tubes can be used to increase ductility and strength of a concrete member and self-consolidating concrete is an ideal material to use in practical applications of concrete-filled fiber tubular columns. However, the propensity of self-consolidating concrete to autogenous shrinkage could reduce the effectiveness of the concrete confinement. This research investigates the use of self-consolidating concrete in pre-cast FRP tubes and various methods of shrinkage reduction and compensation to increase the axial performance of said self-consolidating concrete-filled fiber tubes. Axial compression tests were performed under monotonic and cyclic conditions to determine the stress-strain relationship of the self-consolidating concrete …


Timber Bridge Pile Splicing With Fiber Reinforced Polymer Wraps, Drew L. Damich Jan 2021

Timber Bridge Pile Splicing With Fiber Reinforced Polymer Wraps, Drew L. Damich

Graduate Theses, Dissertations, and Problem Reports (ETD)

Timber pile repair using splicing is widely used but little research has been done to determine their strength capacity after repair using this method. Current timber pile splicing mechanisms utilize various steel or wooden components. Fiber Reinforced Polymer (FRP) wraps can be utilized as replacement to conventional materials in splicing of timber piles. This study evaluated the strength capacities of traditional splicing mechanisms in relation to FRP wrap splice mechanisms. Traditional splicing mechanisms consisted of flat steel plate, C-channel steel plate, and wooden plate splices. The FRP wrap splice consisted of unidirectional glass/epoxy composite with three layers of fabric as …


Estimation And Mitigation Of Stresses In Mass Concrete Structures Containing Ground Granulated Blast Furnaceslag And Fly Ash, Guadalupe Leon Jan 2021

Estimation And Mitigation Of Stresses In Mass Concrete Structures Containing Ground Granulated Blast Furnaceslag And Fly Ash, Guadalupe Leon

Graduate Theses, Dissertations, and Problem Reports (ETD)

In large concrete structures, due to concrete’s low thermal conductivity, the interior temperature rise can approach the concrete’s adiabatic temperature rise. As the concrete’s surface losses heat to the environment and cools rapidly, the interior of the concrete attempts to expand while the exterior provides an internal restraint. The phenomenon causes thermal stresses at the concrete’s surface. If the thermal stresses exceed the concrete’s tensile strength, there is a high probability of cracking. The cracks usually appear during the first few days after construction while the concrete’s tensile strength is low. These early-age cracks can reduce the service life of …