Title:
Lattice-Reinforced Slab-Column Connections under Cyclic Lateral Loading
Author(s):
Su-Min Kang, Hong-Gun Park, and You-Ni Kim
Publication:
Structural Journal
Volume:
110
Issue:
6
Appears on pages(s):
929-940
Keywords:
cyclic loading; lattice reinforcement; punching failure; seismic design; slab-column connection; unbalanced moment
DOI:
10.14359/51686149
Date:
11/1/2013
Abstract:
An experimental study was performed to investigate the seismic performance of slab-column connections reinforced with lattice bars. In the lattice reinforcement, the top and bottom longitudinal reinforcing bars are weld-connected to the web reinforcing bars that are used as shear reinforcement. The top and bottom reinforcing bars provide flexural resistance and anchorage for the web reinforcing bars. In this test, six specimens, including one without shear reinforcement, were tested under cyclic lateral loading and a gravity shear force. The test parameters included the length and layout of the lattice reinforcement. The test results showed that the lattice reinforcement improved the unbalanced momentcarrying capacity and deformation capacity of the slab-column connections by 1.08 to 1.44 and 1.29 to 1.88 times, respectively, depending on the layout of lattice bars. When the cruciform layout with additional diagonal layout was used, the lattice reinforcement showed a good structural performance even with a short lattice length of 3d from the column face.