Mechanics of Biological Systems, Materials and other topics in Experimental and Applied Mechanics, Volume 4 by Pablo Zavattieri Majid Minary Martha Grady Kathryn Dannemann & Wendy Crone

Author:Pablo Zavattieri, Majid Minary, Martha Grady, Kathryn Dannemann & Wendy Crone
Language: eng
Format: epub
Publisher: Springer International Publishing, Cham

Keywords

ExperimentalFinite elementComposite beamCorrugated steel deckCFRP sheets

7.1 Introduction

For large spans in bridges and building systems, continuous steel-concrete composite beams have been used to moderate the sagging moment values at the mid-spans. The steel section and reinforcement in the concrete flange play a vital role in determining the beam capacity at the hogging moment regions over the intermediate supports [1]. Construction time can be saved by using the corrugated steel deck as a platform and then as external reinforcement for the concrete flange. The behavior of the continuous beam is improved by adding CFRP sheet to the concrete flange surface at the hogging moment region. This improvement is achieved by controlling possibly existing cracks in the concrete flange under service loads. The higher stiffness, fatigue life, creep rupture, and less susceptibility against aggressive environments are the main advantages of CFRP materials [2].

In the literature, previous works have been recorded on the performance of composite beams with corrugated steel deck. A FE model was proposed and validated using previous experimental findings to simulate the non-linear behavior of concrete, steel beam, steel rebars and the shear connectors [3]. The effect of shear connectors’ position and thickness of the corrugated steel deck on the capacity, ductility, and modes of failure for the shear connectors was explored [4]. The composite beams with deeply corrugated steel deck showed higher ductility and capacity [5]. A parametric study on a proposed composite flange for steel girders that spans longer but weighs less than the normal concrete flange was carried out using eight tested beams [6].

In addition, several works have been reported on the performance of composite beams stiffened with CFRP bonded to the steel beam to enhance the beam capacity at the sagging moment regions. Experimental tests were carried out on composite beams to explore the possibility of different strengthening techniques of CFRP strips at the sagging moment regions [7, 8]. Experimental study on composite timber beams stiffened by steel sections and CFRP was carried out to show an improvement in the beam capacity, deformation, and ductility for the upgraded beams in comparison to the reference beams [9]. FE models were developed and validated using existing experimental work to compute the flexural capacity of composite beams strengthened with CFRP plate and to predict the debonding failures as well as plate-end debonding [10–12]. An experimental program, consists of six continuous composite beams, was carried out to inspect the influence of using CFRP sheet at the hogging moment region in sustaining the composite connection between the steel beam and the concrete flange [13]. The test findings assert the efficiency of CFRP sheets in keeping composite action for continuous composite beams and avoiding crack propagation in the concrete flange under the applied load. A new method for bending upgrading of steel beams using a specific kind of drillable FRP laminates was developed [14]. Furthermore, the possible increasing in the beam capacity stiffened with mechanically anchored CFRP–GFRP laminates was explored by testing 11 continuous steel beams.

Although previous experimental works have been done to

Download

Copyright Disclaimer:
This site does not store any files on its server. We only index and link to content provided by other sites. Please contact the content providers to delete copyright contents if any and email us, we'll remove relevant links or contents immediately.