INVESTIGATION OF MECHANISMS OF SEISMIC CAPACITY ENHANCEMENT OF RC STRUCTURES USING SCC
Date Issued
2004
Date
2004
Author(s)
DOI
922211E002096
Abstract
In this paper, the experimental results of two reduced-scale bridge column specimens, SCCR1 and
NCR1, are presented. SCC was adopted in the construction of specimen SCCR1. During
concrete placement, no vibration in any form was applied. On the other hand, the control
specimen, NCR1, was cast using conventional concrete and extensive manual vibration was
provided in the process of concrete placement to ensure the extent of concrete consolidation.
Self-compacting concrete (SCC) is a specially proportioned concrete that can flow in its gravity
and fill in the formworks without the need of any internal or external vibration. While being
highly fluid, SCC needs to be sufficiently cohesive as well to prevent segregation or blockage of
aggregates during flowing. It is believed that the advantages of SCC on structural performance
of concrete members come from the following two effects. One is the enhancement in bond
strength of rebar and another is the improved consolidation induced increase in confinement when
the column is under compression. Both of the effects may contribute to the moment capacity as
well as to the ductile behavior of column members. As a result, the observed moment capacity
and ductility of SCCR1 is comparable to NCR1. The non-vibration practice of SCC is thus
verified.
Subjects
Self-compacting concrete
concrete placement
bridge column
bond strength
ductility
plastic hinge
moment capacity
Publisher
臺北市：國立臺灣大學土木工程學系暨研究所
Type
report
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