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عنوان فارسی مقاله:
رفتار بتن پر شده بیضوی لوله های فولادی عمیق تحت خمش-برش
عنوان انگلیسی مقاله:
Behavior of Concrete Filled Elliptical Steel Tubular Deep Beam under Bending-Shear
سال انتشار : 2017
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مقدمه انگلیسی مقاله:
1. Introduction
Concrete filled elliptical steel tubular, so-called CFEST or concrete- filled EHS, members consist of an elliptical steel tube filled in with concrete, as shown in Fig. 1. The CFEST is a family of the concrete filled steel tubular (CFT) members [1–2] having good deformability and large toughness owing to the confinement effect between the steel tube and the in-filled concrete. Moreover, when CFEST member is applied to bridge piers in a river, allowing a smooth water flow around them, reduction of scouring on the riverbed can be expected. So far, there have been various investigations on mechanical behavior of concrete filled and unfilled elliptical hollow steel sections (EHS) and oval hollow sections (OHS) as follows. First, hot-rolled elliptical hollow section stub column test under compression was carried out by Chan and Gardner [3]. Symmetric three- and four-point loading test on hollow elliptical steel tubular beams under bending-shear was performed by Gardner et al. [4] and Chan and Gardner [5], followed by Ruiz-Teran & Gardner [6] and Gardner & Chan [7] who conducted buckling analysis on elliptical hollow steel tubes. As for researches on the CFEST, stub column under centric compression [8–10] and combination of axial force and bending moment [11–12] tests were carried out. Moreover, Ren QX et al. [13] discussed symmetric four-point loading test on CFEST beam. However, these previous researches focused on larger diameter-to-thickness ratio (2a/t) of the EHS or OHS, ranging from 28 to 40. To apply CFEST members to high-rise bridge pier, it is important to investigate CFEST members having large diameter-to-thickness ratio that are larger than 100. Under the above-described background, we have conducted two systematic studies on the CFEST members with large diameter-to-thickness ratio that are larger than 100 to be applied to the bridge piers in riverbeds, namely, the centric loading [14] and the pure bending tests [15]. From the results, it can be stated that the two experimental strengths decreased as diameter-to-thickness ratio of elliptical steel tube increased. In addition, the methods to predict centric loading and pure bending capacities of CFEST were mainly discussed. The present study aims to investigate, experimentally, the shear characteristics of CFEST deep beams with large diameter-to-thickness ratio (2a/t) ranging from 69 to 160 through asymmetric four-point loading test. The selected testing parameters are diameter-to-thickness ratio (2a/t) and loading directions (major and minor axes). A Method to predict simple shear strength of the CFEST deep beam is mainly discussed. Moreover, comparison between ordinary circular CFT and CFEST specimens is also made. In addition, principal stress behavior of the steel tubes induced by in-filled concrete is also mentioned. Part of this study has been previously reported in Japan [16].
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کلمات کلیدی:
[PDF]An Experimental Study on Torsional Behavior of Steel Beams Infilled ... ijiset.com/vol3/v3s3/IJISET_V3_I3_11.pdf systems like buildings, bridges, caissons piers and deep foundations, because ... steel tubular beam, tubular beam in-filled with Plain. Cement ... Concrete (SFRC) beams under torsion. ..... reinforced concrete beams under bending, shear and. [PDF]FINITE ELEMENT ANALYSIS ON THE FLEXURAL BEHAVIOUR OF ... yadda.icm.edu.pl/yadda/...0002.../httpwww_ptmts_org_pl2010-2-arivalagan-k.pdf by S Arivalagan - 2010 - Cited by 3 - Related articles steel-concrete composite beams in combined bending and shear have been of ... ral and shear strengths of simply supported composite beams under combined ... effect of the degree of shear connection on the vertical shear strength of deep ... load versus deformation of steel beam to concrete-filled steel tubular column. Mechanical behavior of concrete filled double skin tubular circular ... https://www.researchgate.net/.../241086936_Mechanical_behavior_of_concrete_filled_d... Concrete filled double skin circular tubular member (CFDST) has a hollowed section consisting of double concentric steel tubes with concrete fill in between ... CFDST deep beam under a combined action of shear and bending through a three ... Research paper: Concrete filled double skin circular tubular beams ... https://www.researchgate.net/.../257095882_Concrete_filled_double_skin_circular_tubu... Methods to predict the shear resistance of deep CFDST beams are also provided ... behavior of concrete filled double steel tubular (CFDST) members under low ... [PDF]Download PDF article - Institution of Structural Engineers https://www.istructe.org/getattachment/5534efd4-f564.../Spotlight-on-Structures.pdf Interactions for Metal Beam-Column Sections. J.A. Rodriguez-Gutierrez ... Behavior of Concrete Filled Elliptical Steel. Tubular Deep Beam under Bending-Shear.
