Long-term lateral-torsional buckling behavior of pin-ended CFST arches under uniform radial loads and temperature field

2020 ◽  
pp. 1-15 ◽  
Author(s):  
Yonghui Huang ◽  
Zhicheng Yang ◽  
Jiyang Fu ◽  
Airong Liu
Keyword(s):  
Temperature Field ◽  
Lateral Torsional Buckling ◽  
Torsional Buckling ◽  
Buckling Behavior

scholarly journals Calibration of Design Buckling Curves for Lateral-Torsional Buckling of Cantilever Beams Made of Glass—Experimental and Numerical Investigations

2019 ◽  
Vol 9 (16) ◽  
pp. 3432
Author(s):  
Ralph Timmers ◽  
Tobias Neulichedl
Keyword(s):  
Cantilever Beam ◽  
Cantilever Beams ◽  
Testing Device ◽  
Lateral Torsional Buckling ◽  
Torsional Buckling ◽  
Numerical Investigations ◽  
Buckling Behavior ◽  
Load Carrying ◽  
Special Case ◽  
Important System

Using glass as a primary load-carrying element is becoming more and more popular in architecture. Probably the most used application is the single-span girder, but another important system is the cantilever beam, which is widely used, e.g., as a canopy in front of an entrance. Research on the lateral-torsional buckling behavior of glass beams has been typically performed on single-span girders. As a consequence, the design buckling curves provided in literature are usually too conservative for the widely used case of a cantilever beam, which is also related to the loading situation. Therefore, experimental and numerical investigations have been performed for this special case. Based on the obtained results, design buckling curves have been developed and resulted in being more economical than the curves already given in the literature. Among others, information on the shape and size of the real imperfections, a testing device for cantilever beams, and experimentally and numerically obtained load-deflection curves are additional outcomes of the investigations presented here.

The Lateral Torsional Buckling Behavior of Laminated Glass Beams

2020 ◽  
Vol 20 (07) ◽  
pp. 2050080
Author(s):  
Xiaokun Huang ◽  
Mingzhe Cui ◽  
Qiang Liu ◽  
Jianguo Nie
Keyword(s):  
Initial Imperfection ◽  
Influential Factors ◽  
Scale Model ◽  
Laminated Glass ◽  
Lateral Torsional Buckling ◽  
Torsional Buckling ◽  
Load Duration ◽  
Long Span ◽  
Buckling Behavior ◽  
Glass Type

In this paper, the lateral torsional buckling (LTB) behavior of multi-layered long-span laminated glass (LG) beams is investigated through full-scale model test and numerical simulation. In the test program, the LG beams consisting of up to four glass plies and spanning 5000[Formula: see text]mm are constructed and tested. The load-displacement curves and development of strain in glass plies are recorded, based on which the deformation and stress state of buckled LG beams are analyzed, and the strength checking criterion is provided. The test results are also used to determine the shape and amplitude of initial imperfection through statistical analysis and to validate a numerical model based on the finite element method (FEM). Parametric analysis based on the FEM model is then conducted to investigate influential factors on the LTB resistance of LG beams, among which the influence of shape and amplitude of initial imperfection is emphasized. For the LTB design of LG beams, the applicability of existing formula to determine the critical buckling moment through effective stiffnesses is evaluated for multi-layered LG beams with the test and numerical results. Finally, the design buckling curves adopting the Ayrton–Perry formula (APF) are proposed and validated for LG beams categorized with glass type and load duration.

scholarly journals RELIABILITY ANALYSIS OF THE LATERAL TORSIONAL BUCKLING RESISTANCE AND THE ULTIMATE LIMIT STATE OF STEEL BEAMS WITH RANDOM IMPERFECTIONS

2015 ◽  
Vol 21 (7) ◽  
pp. 902-911 ◽  
Author(s):  
Zdeněk Kala
Keyword(s):  
Failure Probability ◽  
Limit State ◽  
Ultimate Limit State ◽  
Safety Factors ◽  
Lateral Torsional Buckling ◽  
Torsional Buckling ◽  
Random Variability ◽  
Partial Safety Factors ◽  
Ultimate Limit

The paper deals with the analysis of reliability of a hot-rolled steel IPE-beam designed according to Eurocodes. A beam at its ultimate limit state is considered. The load acting on the beam consists of permanent and long-term single variation actions. The beam is loaded with end bending moments about the major principal axis. The beam is susceptible to lateral torsional buckling between the end supports. Reliability of the beam is assessed using probabilistic analysis based on the Monte Carlo method. Failure probability is a function of the random variability of the loadcarrying capacity and the random variability of load effects. The variability of the load-carrying capacity is influenced by the variability of initial imperfections. Imperfections are considered according to experimental research. Numerical studies showed that the failure probability is significantly misaligned. High values of failure probability were obtained for slender beams, for beams loaded only by permanent load action, and for beams loaded only by long-term single variation load. In further studies the values of partial safety factors of load and resistance were calibrated so that the failure probability had a target value of 7.2E–5. Relatively high values of partial safety factors were obtained especially for beams with high slenderness.

scholarly journals Inelastic Ultimate Load Analysis of Steel Frames Considering Lateral Torsional Buckling Under Distributed Loads

2019 ◽  
Author(s):  
Mutlu Secer ◽  
Ertugrul Turker Uzun
Keyword(s):  
Carrying Capacity ◽  
Ultimate Load ◽  
Steel Frames ◽  
Load Carrying Capacity ◽  
Lateral Torsional Buckling ◽  
Torsional Buckling ◽  
Numerical Examples ◽  
Buckling Behavior ◽  
Load Carrying ◽  
Load Analysis

Contemporary structural design approaches necessitates ways to determine realistic behavior of structures. For this purpose, inelastic ultimate load analysis methods are used widely since strength and stability of whole structure can be represented. In this study, a numerical method is proposed for determining inelastic ultimate load capacity of steel frames considering lateral torsional buckling behavior under distributed loads. In the analyses, inelastic material behavior, second-order effects and residual stresses of the structural frame system and its members are taken into account. Additionally, lateral torsional buckling behavior is considered in the analysis using finite difference method and it is used for determining the structural load carrying capacity of steel frames. Consequently, the problem associated with flexural capacity decreases due to lateral torsional buckling is precisely considered in the load increment steps of inelastic ultimate load analysis. In order to validate the proposed method, numerical examples from the literature are calculated considering the proposed method, AISC 360-16 design specification equations and approaches from the literature. Results of the numerical examples show that lateral torsional buckling is a key issue in determining structural load carrying capacity. Thus, proposed analysis method is shown to be an efficient and consistent tool for inelastic ultimate load analysis.

scholarly journals EFFECT OF VERTICAL WEB STIFFENERS ON LATERAL TORSIONAL BUCKLING BEHAVIOR OF CANTILEVER STEEL I-BEAMS

2004 ◽  
Vol 7 ◽  
pp. 233-246
Author(s):  
Mohammed HASSANIEN ◽  
Machaly BAHAA ◽  
Hesham SOBHY ◽  
Ahmed HASSAN ◽  
Junya INOUE
Keyword(s):  
Lateral Torsional Buckling ◽  
Torsional Buckling ◽  
Buckling Behavior ◽  
Web Stiffeners

scholarly journals PERILAKU BALOK BAJA I BUILT-UP

2019 ◽  
Vol 3 (2) ◽  
Author(s):  
Titin Sundari
Keyword(s):  
Steel Plate ◽  
Steel Beam ◽  
Live Load ◽  
Dead Load ◽  
Lateral Torsional Buckling ◽  
Torsional Buckling ◽  
Concentrated Load ◽  
Buckling Behavior ◽  
Plate Elements ◽  
Bending Capacity

AbstrakBalok adalah komponen struktur lentur yang memikul beban gravitasi, beban gravitasi ini berupa beban mati danbeban hidup yang bekerja tegak lurus dengan sumbu longitudinal balok. Salah satu bentuk balok yang efisienadalah balok profil I yang dibentuk dengan pengelasan atau yang dikenal dengan sebutan balok baja I built-up. Dalam penelitian eksperimental ini, balok baja dibuat dengan memotong lembaran pelat baja menjadi elemenelemenpelat sayap dan pelat badan dengan menggunakan pengelasan sehingga membentuk suatu balok bajaprofil I (balok baja I built-up). Sedangkan konstruksi balok yang digunakan adalah konstruksi balok sederhana(simple beam) dengan beban terpusat di tengah bentang. Penelitian ini bertujuan menganalisis kapasitas lenturdan mengetahui perilaku tekuk balok baja I built-up. Hasil dari ekeperimen ini dibandingkan dengan perhitungansesuai SNI 03-1729-2002 dan validasi dengan menggunakan software ANSYS. Dari penelitian ini didapatkan kapasitas lentur beradasarkan eksperimen lebih tinggi dibanding dengan SNI 031729-2002danANSYS.Sedangkankeruntuhanyangterjadiadalahkeruntuhantekuktorsilateral.Katakunci:built-up,momenkapasitas,tekuktorsilateralAbstract Beam is a structural member that carries a dead load or live load that works perpendicular to its longitudinal axisis beam. One form of an efficient beam is a beam profile I which is formed by welding or known as I built-upbeam.In this experimental study, the steel beam is made by cutting the sheet of steel plate into wing plate elements andbody plate by using welding to form a steel profile I (steel beam I built-up). The construction of beam is used asimple beam with concentrated load in the middle of the span. This study aims to obtain bending capacity andknow the buckling behavior of I built-up steel beam. The result of this experiment is compared with thecalculation according to SNI 03-1729-2002 and validation using ANSYS software.From this research, the bending capacity based on experiments is higher than that of SNI 03-1729-2002 andANSYS. While the collapse that occurs is the collapse of lateral torsional buckling.Keywords : built-up, bending capacity, lateral torsional buckling

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