Connections between RC beam and square tubed-RC column under axial compression: Experiments
Xu-Hong Zhou,Bin-Yang Li,Dan Gan,Jie-Peng Liu,Y. Frank Chen
Abstract
The square tubed-reinforced concrete (TRC) column is a kind of special concrete-filled steel tube (CFST) columns, in which the outer thin-walled steel tube does not pass through the beam-column joint, so that the longitudinal steel reinforcing bars in the RC beam are continuous through the connection zone. However, there is a possible decrease of the axial bearing capacity at the TRC column to RC beam connection due to the discontinuity of the column tube, which is a concern to engineers. 24 connections and 7 square TRC columns were tested under axial compression. The primary parameters considered in the tests are: (1) connection location (corner, exterior and interior); (2) dimensions of RC beam cross section; (3) RC beam type (with or without horizontal haunches); (4) tube type (with or without stiffening ribs). The test results show that all specimens have relatively high load-carrying capacity and satisfactory ductility. With a proper design, the connections exhibit higher axial resistance and better ductility performance than the TRC column. The feasibility of this type of connections is verified.
(1) Xu-Hong Zhou, Bin-Yang Li, Dan Gan, Jie-Peng Liu — Key Laboratory of New Technology for Construction of Cities in Mountain Area (Ministry of Education), Chongqing University, Chongqing 400045, China
(2) Xu-Hong Zhou, Bin-Yang Li, Dan Gan, Jie-Peng Liu — School of Civil Engineering, Chongqing University, Chongqing, 40045, China
(3) Dan Gan — School of Civil Engineering, Chang'an University, Xi'an 710061, China
(4) Y. Frank Chen — Department of Civil Engineering, The Pennsylvania State University, Middletown, PA 17057, USA.
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