Abu Dhabi, United Arab Emirates
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Lee T.-K.,Architecture and Building Research Institute | Kuo C.-Y.,Architecture and Building Research Institute | Kuo C.-Y.,National Cheng Kung University | Pan A.D.E.,Western Region Infrastructure Sector | Li Y.-C.,Architecture and Building Research Institute
Journal of Testing and Evaluation | Year: 2013

A wind generator is used for producing a wind stream equivalent to the required wind velocity pressure for dynamic water penetration tests for curtain walls. A two-phase experimental program was carried out. In the first stage, the calibration of the wind generator was conducted following AAMA 501.1-05 procedures. In the second stage, the dynamic pressure distribution on the surface of the test chamber for curtain walls was studied. Discussions of the experimental results are presented, as well as new design aids for curtain wall design. Some of the experimental results and conclusions could be useful in the future for comparisons between laboratories having similar electric-fan-based test systems. Copyright© 2013 by ASTM International.


Lee T.-K.,Architecture and Building Research Institute | Chen C.-C.,National Taiwan University of Science and Technology | Pan A.D.E.,Western Region Infrastructure Sector | Hwa K.,Taoyuan Innovation Institute of Echnology | Ma M.J.L.,T.Y. Lin Taiwan Consulting Engineers
Magazine of Concrete Research | Year: 2013

Six sets of large-scale circular reinforced concrete column sections were tested under monotonically axial compression. The primary variables were the transverse reinforcement class (spiral or circular tie), splice type and crossties. The equivalent volumetric ratio of transverse steel bar for two crosstie types is proposed and findings for practical design are outlined in this paper.


Lee T.-K.,Architecture and Building Research Institute | Chen C.-C.,National Taiwan University of Science and Technology | Pan A.D.E.,Western Region Infrastructure Sector | Hsiue K.-Y.,Architecture and Building Research Institute | And 2 more authors.
Structural Concrete | Year: 2013

Eight sets of large, circular, short reinforced concrete columns were tested under monotonic axial compression. The primary variables are type of transverse reinforcement (spiral vs. circular tie), type of splice, end hook length and staggered length of adjacent circular ties. The tests confirmed the acceptable performance of the circular tie newly proposed in ACI 318M-11. In addition, the circular tie scheme in which the ends terminate with hooks that engage with a longitudinal steel bar and bend into the concrete core is acceptable for performance and ease of construction. The effectiveness of its end hook length and the staggered length of adjacent circular ties is also investigated. Copyright © 2013 Ernst & Sohn Verlag für Architektur und technische Wissenschaften GmbH & Co. KG, Berlin.


Lee T.-K.,Architecture and Building Research Institute | Chen C.-C.,National Taiwan University of Science and Technology | Tsou P.-C.,Architecture and Building Research Institute | Lin K.-T.,Architecture and Building Research Institute | And 2 more authors.
Advances in Structural Engineering | Year: 2012

The effectiveness of crossties in six sets of large-scale reinforced concrete short columns under monotonic axial compression is evaluated experimentally. The primary variables were type of crosstie engagement, type of crosstie, and crosstie placement offset. It was observed that minor placement offset up to 20 mm between hooks of crossties and longitudinal steel bars does not bring unfavorable consequences in confinement. The crosstie hook engagement of both hoop and longitudinal steel bar is better than that engagement of the longitudinal steel bar alone, but it is difficult in installation. Crossties composed of two straight end-180-deg hook steel bars give the best performance among the types of crosstie and it is convenient to facilitate the fabrication of reinforcing cages. However, the effectiveness under cyclic loading needs further study.


Lee T.-K.,Architecture and Building Research Institute | Chen C.-C.,National Taiwan University of Science and Technology | Hwa K.,Taoyuan Innovation Institute of Technology | Pan A.D.E.,Western Region Infrastructure Sector
Proceedings of the Institution of Civil Engineers: Structures and Buildings | Year: 2014

Six sets of large-scale, square, reinforced concrete columns are tested under monotonically static axial compression loads. The primary variables are type of crosstie engagement, crosstie placement offset and type of hoop. The tests confirm that the crosstie hook engaging the hoop or engaging both the hoop and the longitudinal steel bars is better than just engaging the longitudinal steel bar. It is observed that the effect of not altering end for end along the longitudinal reinforcement is not significant to the efficiency of the crossties. Hoops composed of two overlapped L-shape ties, with a 1358 hook at each end, in reinforced concrete columns gave acceptable performance, and it is convenient to facilitate the fabrication of reinforcing cages using that set-up. However, the effectiveness under cyclic loading needs further study. © ICE Publishing: All rights reserved.

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