Title:
Grouted Precast Concrete Column Connections under
Reversed Cyclic Bending and Compression
Author(s):
L. X. Zheng
Publication:
Structural Journal
Volume:
93
Issue:
3
Appears on pages(s):
247-256
Keywords:
connection/joint; grouted joint; joint thickness; precast con-crete
column; stiffness; strength; structural design.
DOI:
10.14359/9684
Date:
5/1/1996
Abstract:
The behavior of a dowelled and grouted precast concrete column connec-tion under reversed and cyclic bending combined with axial compression was investigated experimentally. The connection was formed by grouting dowel bars extended from one column unit into ducts in the other The thickness of the joint and the spacing of lateral steel in the vicinity of the joint were taken as test parameters. The specimens were subjected to reversed bending moment cycles while keeping axial compression constant. Test results show that the load capacity of the connection can be estimated using conventional reinforced concrete theory. Reversed bending cycles at a same moment level caused progressive stifSness reduction only when the moment level was above a critical value. Below this critical level, bending cycles at a same moment level did not cause stifiess reduction. However, an increase in the bending moment level resulted in stifiess degradation. Specimens with a smaller joint thickness perorrned better.