|Table of Contents|

Mechanical Behavior of Concrete-filled Square Steel Tube Stiffened with PBL(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2012年04期
Page:
13-17
Research Field:
Publishing date:

Info

Title:
Mechanical Behavior of Concrete-filled Square Steel Tube Stiffened with PBL
Author(s):
LIU Yong-jian1;  ZHANG Ning1; 2;  ZHANG Jun-guang1
1. Bridge Detection and Strengthening Key Laboratory of Transportation Industry, Chang'an University, Xi'an 710064, Shaanxi, China; 2. CCCC First Highway Consultants Co., Ltd, Xi'an 710075, Shaanxi, China
Keywords:
concrete-filled square steel tube;  PBL shear connector;  bond strength;  bearing capacity;  load transmission mechanism
PACS:
TU375.1
DOI:
-
Abstract:
To improve the interface behavior between the tube and concrete column, a new type of concrete-filled steel tube inside placed by a longitudinal stiffener with PBL holes was proposed. It provided functions of both stiffness enhance and internal shear connection to the concrete-filled steel tube. An axial compression test was employed to investigate the improvement of bearing capacity of concrete-filled square steel tube stiffened with PBL shear connector. The shear bond between steel and concrete was analyzed for the concrete-filled tubes with and without PBL stiffener. The results show that the bearing capacity is enhanced by 14% to 28% compared to that without PBL stiffener, and its ductility is also improved. The transfer distance of shear force from steel tube to concrete column is decreased dramatically with the aid of PBL stiffener. As a result, the PBL stiffener, welded on the tube surface inside, can effectively improve the mechanical property of concrete-filled steel tube, thus can provide a new enhancement measure for bridge construction.

References:

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Last Update: 2012-12-20