Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 54 for “"RC structures"”.
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Seismic Assessment of RC Structures Considering Vertical Ground Motion
… motion significantly increased the axial force variation and at several times induced an axial tension force. Moreover, more severe cracking and damage were observed with significant increase in spiral strains when vertical ground motion was included as an input. Based on the observed axial …
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Surface Treatments for RC Structures in Marine Environments: A Literature Review
If designed correctly, structures made from reinforced concrete have the potential to be very durable and are capable of enduring a wide variety of hostile environmental conditions. However, structural design and engineering standards that are currently available do not provide for sufficient and …
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Enhanced Nonlinear Truss Model for Capturing Combined Earthquake and Fire Effects in RC Structures
… the safety and collapse probability of Reinforced Concrete (RC) structures. At present, there has been no systematic effort to assess the performance of RC structures for combined earthquake and fire effects. Developing appropriate guidelines for this scenario requires simulation tools that …
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Refinement of air-borne chloride exposure classes for RC structures in the Cape Peninsula
… at informing and modifying the design method for RC structures that are not in direct contact with seawater but are within the marine environment. The evaluation of the severity of the exposure environment will enable an informed design of concrete structures that satisfies their desired service …
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Evaluation of surface treatments for RC structures failing to meet South African durability index requirements
… main durability problem is corrosion of reinforcing steel caused by the ingress of aggressive agents and moisture. The South African durability index approach makes use of indices to evaluate the potential durability of concrete. Once limiting values on the as built structure meet specific …
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Behaviour of FRP strengthened RC Beams with concrete patch repairs subjected to impact loading
… performance levels and serviceability of reinforced concrete (RC) structures are always the priorities of asset managers, engineers and researchers in any country. RC structures in service may fail to adequately perform due to changes in functionality, corrosion attack on the reinforcing bars, …
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Probabilistic modelling for durability design of reinforced concrete structures
… model for durability design of reinforced concrete (RC) structures in South African marine conditions. Durability design of RC structures is mainly concerned with ensuring the ability of the concrete to resist the penetration of aggressive agents during the concrete‘s intended service …
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Numerical modelling and underlying electrochemical mechanism characterisation of cathodic protection for chloride contaminated reinforced concrete structures
… in the rehabilitation of deterioratedReinforced Concrete (RC) structures worldwide. However, the quantitative specifications of CP technology for RC structures in national and international standards mainly depend on empirical experience and qualitative assessment, which lead to …
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Corrosion Behavior of Corrosion-Resistant Steel Reinforcements in High and Ultra-High Performance Concrete in Chloride Attack Environments
Corrosion of reinforcing steel is one of the most important concerns for reinforced concrete (RC) structures. The use of corrosion-resistant steel reinforcements and advanced concrete is one potential solution. This dissertation presents the research findings of the corrosion behavior of …
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The integration of non-destructive test methods in the South African Durability Index approach
… for specifying (or assessing) the durability of RC [reinforced concrete] structures. The oxygen permeability index (OPI) test is being standardised in South Africa, and has been implemented in a large scale project by the South African National Roads Agency Limited (SANRAL). However, the …
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A Critical Evaluation of the Use of Crack Width Requirements in the Durability Design of Marine Reinforced Concrete Structures
… (CWRs), which aim to limit cracks in reinforced concrete (RC) to maximum prescribed values, play a major – and often dominant – role in the design of marine RC structures. However, there are several issues with the current CWRs, chief among which is the fact that, despite decades of …
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Strengthening reinforced concrete slabs using a combination of CFRP and UHPC
Reinforced concrete (RC) structures are widely used in construction. Due to aging infrastructure, increased loads, and inadequate maintenance, RC structures need to be retrofitted for prolonged lifespan and increased capacity. Traditional methods of strengthening involve the installation of fiber …
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A framework towards the design of more sustainable concrete structures
… of a novel framework for the design of reinforced concrete (RC) structures which aims at ensuring that future RC structures have the lowest possible carbon footprint, energy use and impact on the environment. The key focus of the study is on structural design where there is a lack of grasp of …
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Discrete sacrificial anodes and their use in service life extension of chloride contaminated reinforced concrete structures
… in South Africa as the number of deteriorating RC structures needing repair is increasing. Currently, the South African concrete repair industry mainly relies on the application of patch repairs and corrosion inhibitors while other potentially successful methods such as sacrificial anodes are …
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Assessing the influence of crack width on the durability potential of cracked concrete using the durability index approach
Durability is a major concern for reinforced concrete (RC) structures. RC structures both in service and new, are subject to cracking. Irrespective of the cause of the cracking, cracks can increase the rate of penetration of aggressive species into concrete and modify the transport properties. …
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An investigation into the relationship between surface concrete resistivity and chloride conductivity test
… parameter for service life prediction (SLP) of RC structures in the marine environment, using a modified version of Crank’s solution to Fick’s second law of diffusion. The surface concrete resistivity test is an electrochemical test that has a good correlation with the concrete chloride …
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Cyclic Uniaxial Constitutive Model For Steel Reinforcement
Reinforced Concrete (RC) structures are common in earthquake-prone areas. During an earthquake, the steel reinforcement is subjected to cyclic strain histories which lead to inelastic response. In the case of rare, strong earthquakes, inelastic buckling and even rupture due to low-cycle fatigue can …
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Durability behavior of fiber reinforced polymer and steel reinforced polymer for infrastructure applications
<p>"Crack development in reinforced concrete (RC) structures is common in elements such as bridge decks. However, these cracks can impose significant problems over time, because they allow chlorides from deicing chemicals to infiltrate concrete which will then corrode steel bars as RC structures …
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Response of high-strength steel reinforced concrete structures to simulated earthquakes
<p>In reinforced concrete (RC) structures expected to resist earthquake demands, substituting smaller amounts of high-strength steel for conventional steel reinforcement can help reduce reinforcement congestion and placement costs while keeping strength unchanged.</p> <p>Provided cross-sectional …
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Development of Novel Computational Simulation Tools to Capture the Hysteretic Response and Failure of Reinforced Concrete Structures under Seismic Loads
Reinforced concrete (RC) structures constitute a significant portion of the building inventory in earthquake-prone regions of the United States. Accurate analysis tools are necessary to allow the quantitative assessment of the performance and safety offered by RC structures. Currently available …
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