• Proceedings of the Korea Concrete Institute Conference
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• 2005.05a
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• pp.59-62
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• 2005

Seven columns laterally reinforced with either mechanically anchored crossties or conventional crossties under cyclic loading are tested. 4 columns are specimens for flexural strength and 3 columns are for shear strength. Main variable is anchorage types of crossties. Conventional hooks, 180$^{\circ}$ standard hook-mechanical anchorage and all mechanical anchorage type are used. The specimens are tested under 10$\%$ axial load of nominal axial capacity of the columns combined with increasing lateral load. From the flexure test, it is found that columns with mechanical anchorages exhibit superior performance in terms of ductility and energy dissipation. The crossties with mechanical anchorages reduce buckling length of longitudinal rebar. From the shear test, it is found that. 3 specimens exhibit almost the same strength, displacement, and shear failure mode at ductility factor =2.

• Earthquakes and Structures
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• v.7 no.5
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• pp.861-875
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• 2014

This paper studies the response of seismic behavior of reinforced concrete exterior beam-column joints under reversal loading with different anchorages and joint core details. The joint core was detailed without much confinement (group-I) and/or with proposed X-cross bars in the core (group-II). The beam longitudinal reinforcement's anchorages were designed as per ACI 352 (headed bars), ACI 318 (conventional $90^{\circ}$ bent hooks) and IS 456 ($90^{\circ}$ bent hooks with extended tails). The nonlinear finite element analysis response of the beam-column joints was studied, along with initial and progressive cracks up to failure. The experimental and analytical results were compared and presented in this paper to make more scientific conclusions.

• Journal of the Korea institute for structural maintenance and inspection
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• v.4 no.2
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• pp.159-166
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• 2000

The development of external prestressing methods has been one of the major trends in the concrete bridge constructions over the past decades. One of the promising methods to enhance the flexural strength of a externally prestressed girder is to place the tendons with large eccentricities. The analysis and design of composite girders prestressed by external tendons involve difficulties related mainly to the position of anchorages and the construction sequences. This study was conducted on the concrete bridges reinforced by the continuous girders and the external prestressing. The test results in this study showed that the external prestressing of a composite girder increased the range of the elastic behavior, reduced deflections, increased ultimate strength, and added to the redundancy by providing the multiple stress paths.

• Proceedings of the Korea Concrete Institute Conference
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• 2000.10a
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• pp.491-496
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• 2000

• Proceedings of the Korea Concrete Institute Conference
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• 2000.10b
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• pp.1013-1018
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• 2000

• Journal of the Korea institute for structural maintenance and inspection
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• v.10 no.4
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• pp.167-174
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• 2006

The purpose of this paper is to analyse and compare experimentally flexural behavior of RC beams strengthened with CFRP plates by different methods, which are divided into three classes: externally-bonded without end anchorage, externally-bonded with end anchorages, and anchored after prestressing of CFRP plates. Test results show that the RC beams strengthened with end anchorages have the improvement of ductility and flexural performance evaluation including ultimate strength and deflection, compared with only external bonding. Especially, RC beams with prestressed and anchored CFRP plates increase ultimate strength and ductility significantly.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.14 no.6
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• pp.1329-1339
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• 1994

The purpose of present study is to explore the mechanical behavior of anchorage zones in prestressed concrete members with single and closely-spaced multiple tendon anchorages. The cracking loads and local stress distributions at these anchorage zones are studied. To this end, a series of experiments have been conducted. From this study, it is found that the failure of anchorage zones of the closely-spaced multiple tendon members is initiated by cracking along the tendon path and that the tensile stresses arising in the vicinity of anchorage zone of the first tendon are reduced due to additional compression of the second tendon. This results in the increase of cracking capacity of the member. The effects of multiple tendons are presented in the form of strain distribution and cracking load comparisons.

• Magazine of the Korea Concrete Institute
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• v.20 no.5
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• pp.77-82
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• 2008

• Proceedings of the Korea Concrete Institute Conference
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• 2009.05a
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• pp.147-148
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• 2009

The anchorage system unified both PS strand and bar effectively introduced a prestress into a flexural concrete members. This study examined the relation between the anchorages of both ends and the introduced force and derived the equation for design.

• Journal of the Korea institute for structural maintenance and inspection
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• v.10 no.6
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• pp.123-135
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• 2006

Most of all, large spatial span structures are the symbol of cities but have to get to supply the purpose of structure simultaneously, therefore their foundations are designed to get rolls of structure support, structure shape maintenance or overturn prevention, buoyancy resistance, etc. Accordingly various type foundations have been introduced, and after anchorage power is introduced for double structures shape maintenance and overturn prevention, change of anchorage power checked in the construction process is reviewed, comparing of playground case. Case1 anchors for the control of horizontal power worked outside hemisphere type roof, Case2 anchors for the overturn prevention of cantilever roof examined in this example. The examination has been executed by the analysis of anchorage power introduction process, related test results and anchorage power monitoring results for 2 examples.