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http://dx.doi.org/10.4334/JKCI.2010.22.3.409

Similitude Law on Material Non-linearity for Seismic Performance Evaluation of RC Columns  

Lee, Do-Keun (Dept. of Civil and Environmental Engineering, Seoul National University)
Cho, Jae-Yeol (Dept. of Civil and Environmental Engineering, Seoul National University)
Publication Information
Journal of the Korea Concrete Institute / v.22, no.3, 2010 , pp. 409-417 More about this Journal
Abstract
This paper discusses a series of experiments including material improvement in order to ensure quality of grouting for the post-tensioned structure. In prestressed concrete, grouting refers to the construction procedure of filling empty space of duct enclosing with strands using cementitious material, To date, adequate quality control of the grouting has not been established in Korea because the relationship between the grouting and durability of post-tensioned structure is not well-recognized. The Korean standard does not consider the important material characteristic, wick effect, which is caused by strands in the ducts and current standard testing method unlikely quantify reasonable material segregation. As a result, the grout material, which meets the current material standards, may exhibit excessive bleeding water or shrinkage during construction. In this study, international codes and standards related to grouting were surveyed. The ratio of constituents and novel admixtures were suggested to meet equivalently with these standards. Performance of this enhanced grout was compared to common domestic grout using the international standard testing method. A series of mock-up specimens considering geometry of PC beam was constructed and grout flow pattern was observed as the grout was injected. It was observed that the grouting performance was highly influenced by material properties and filling characteristic can be varied depending on geometry of ducts.
Keywords
seismic performance evaluation; column; pseudo-dynamic test; shaking table test; scaled model;
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Times Cited By KSCI : 1  (Citation Analysis)
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