• Proceedings of the Korea Concrete Institute Conference
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• 2010.05a
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• pp.127-128
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• 2010

The purpose of this study is to evaluate the seismic performance of gravity-designed post tensioned (PT) flat plate frames with and without slab bottom reinforcement passing through the column. For the PT flat plate frames, the slab bottom reinforcement is often omitted since the requirement for the slab bottom reinforcement for PT flat plates is not clearly specified in ACI 318-08. This study evaluates the seismic performance of the model frames was evaluated by conducting nonlinear time history analysis. The seismic performance of PT flat plate frames is significantly improved by placing slab bottom reinforcement passing through the column.

• Proceedings of the Korea Concrete Institute Conference
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• 2010.05a
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• pp.449-450
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• 2010

The pavement for high speed weigh-in-motion system have to have durability for a long time without deformation such as rutting so as to sustain precision, accuracy and repeatability. In this paper, PTCP(Post-Tensioned Concrete Pavement) that heavy traffic resistance and durability provide was constructed and field application was evaluated.

• Proceedings of the Korea Concrete Institute Conference
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• 2010.05a
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• pp.15-16
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• 2010

The field experiments and analyses were performed to apply Post-Tensioned Prestressed Concrete Pavement(PTCP) at the Weigh-in-Motion(WIM) sensor installed sections. The experimental results showed that PTCP could be acceptable for WIM sections because the displacements were negligibly smaller at the cutting location for sensor installation.

• Proceedings of the Korea Concrete Institute Conference
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• 2010.05a
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• pp.17-18
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• 2010

This study was conducted to develop the design guide of PTCP (Post Tensioned Concrete Pavement). The behavior of PTCP was investigated by performing structural analyses and field experiments. Based on the results, the PTCP design guide was developed by determining the size of concrete slab, design environmental and vehicle loads, and amount and method of longitudinal and transverse tensioning.

• Computers and Concrete
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• v.1 no.3
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• pp.249-260
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• 2004

The stress transmission mechanism in pretensioned concrete beams, though very interesting from an economical point of view, is very complex, integrating various phenomenons such as sliding, bond, bursting. For long the complexity of this mechanism has led engineers to provide a massive rectangular anchorage zone at each end of the beam. The necessity of using such a concrete reinforcement is certainly unquestionable in post-tensioned beams. However in pretensioned elements the stresses induced in concrete in the anchorage zone are smaller than in post-tensioned elements. In this article the stress field in the end zone is calculated numerically and from this analysis the possible reduction of the cross-section of the anchorage block is examined.

• Proceedings of the Korea Concrete Institute Conference
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• 2004.11a
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• pp.77-80
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• 2004

In bridge deck systems, deflections and cracking can be controlled by longitudinal and transverse prestressing, There are some benefits, longitudinal cracking control, the thickness reduction of deck slab, the widening of deck width and the reduction of the cross section area, in transversely post-tensioned concrete box girder bridges. However, it has been not sufficient to study the structural behaviors of transversely post-tensioned concrete box girder. Therefore, It is needed to predict the structural behaviors by prestressing and static loading. In this study, the analytical and experimental load tests are carried out to study the effect of transverse prestressing on concrete box girder. For these objectives, four test specimens are fabricated with various tendon spacing and steel ratio of top slab. The analytical and experimental studies are performed to estimate effects of the prestressing and failure tests.

• Smart Structures and Systems
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• v.30 no.6
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• pp.627-637
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• 2022

Recent years, direct displacement-based design (DDBD) procedure is proposed for the design of un-bonded posttensioned (UPT) concrete wall systems. In the DDBD procedure, the determination of the equivalent viscous damping (EVD) ratio is critical since it would influence the strength demand of the UPT wall systems. Nevertheless, the influence of EVD ratio determination of the UPT wall systems were not thoroughly evaluated. This study was aimed to investigate the influence of different EVD ratio determinations on the DDBD procedure of UPT wall systems. Case study structures with four, twelve and twenty storeys have been designed with DDBD procedure considering different EVD ratio determinations. Nonlinear time history analysis was performed to validate the design results of those UPT wall systems. And the simulation results showed that the global responses of the case study structures were influenced by the EVD ratio determination.

• 한국도로학회:학술대회논문집
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• 2009.11a
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• pp.505-508
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• 2009

• 한국도로학회:학술대회논문집
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• 2009.11a
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• pp.465-469
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• 2009

• 한국도로학회:학술대회논문집
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• 2010.09a
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• pp.427-430
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• 2010