A new method for progressive collapse analysis of steel frames

Lin, Shu-Chao; Yang, Bo; Kang, Shao‐Bo; Xu, Shao-Qian

doi:10.1016/j.jcsr.2018.09.029

Cited by 18 publications

(3 citation statements)

References 13 publications

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“…Robustness against possible failure of elements in the bridge's main latticework was also studied by recreating artificially failures in the main trusses. The aim was thus, not to determine the causes of possible crack initiation and propagation, but to determine the consequences of a local element failure, known as the scenario-independent approach [7][8][9][10], widely used to study progressive or disproportionate structural collapse after a local failure. This method can evaluate structural robustness understood as insensitivity to or propagation of a local failure.…”

Section: Robustness: Experimental and Numerical Approachmentioning

confidence: 99%

Fatigue Assessment of Old Riveted Railway Bridges: Laboratory Testing of a Real Bridge

Adam¹,

Calderón²,

Buitrago³

et al. 2021

12th International Conference on Structural Analysis of Historical Constructions

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The bridge over the Quisi Ravine in Alicante Province (Spain), built between 1913 and 1915, consists of six 22-22-42-42-22-22 m long steel Pratt truss spans, the lateral spans being isostatic and the central spans continuous. All the joints between the steel elements are riveted. As the bridge has been carrying railway traffic for more than 100 years, its condition needed to be assessed before carrying out the necessary repairsreinforcement to extend its service life. One of the most interesting tasks on the bridge involved a study of its fatigue behaviour to estimate its remaining useful life. Only a few kilometres away there happened to be another bridge with identical geometry over the Ferrandet Ravine, which had recently been dismantled and taken out of service and had carried the same railway traffic as the one over the Quisi Ravine. Advantage was therefore taken of this unique opportunity to test one of its isostatic spans in order to extrapolate the results to the Quisi Bridge. These tests were carried out at the ICITECH laboratories at the Universitat Politècnica de València in two different scenarios: 1) one test on a 22 m span, and 2) another on one of its girders, in both of which simulated railway traffic cyclical loads were applied. The results allowed us to estimate the number of trains that could pass over the bridge and its remaining service life, and also to define a monitoring method to help in decision making in case of possible failures of its component parts. The study also included an analysis of the bridge's robustness in local failures of some of its elements, which led to a further bridge cyclical loading test with a deliberately damaged component. Even though other researchers had previously carried out fatigue tests on full-scale riveted bridge elements, the ICITECH study is unique in that it is the first time a full-scale bridge has been subjected to fatigue tests. This work was accompanied by advanced numerical modelling studies considering the fracture mechanics theory.

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Section: Robustness: Experimental and Numerical Approachmentioning

confidence: 99%

Fatigue Assessment of Old Riveted Railway Bridges: Laboratory Testing of a Real Bridge

Adam¹,

Calderón²,

Buitrago³

et al. 2021

12th International Conference on Structural Analysis of Historical Constructions

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“…To further investigate the behavior of steel sub-frames with RBS against progressive collapse, FE models using explicit software LS-DYNA [41] were employed due to its numerical stability and variety of constitutive models [42][43][44][45][46][47][48][49][50]. Many other software has been used in progressive collapse analysis [51], however, it is found that LS-DYNA is one of the most powerful software.…”

Section: Numerical Modelmentioning

confidence: 99%

Progressive collapse resistance of two-storey seismic configured steel sub-frames using welded connections

Qian

Lan

et al. 2020

Journal of Constructional Steel Research

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This paper presents the experimental and numerical investigation on resistance of two-storey steel sub-frames subjected to a middle column removal scenario. Two different types of 1/2 scaled steel sub-frames with seismic configuration were fabricated and tested, they are: (1) welded connections with gross beam section (GBS) and (2) welded connections with reduced beam section (RBS, typically used for energy dissipation in earthquake design). Based on the test results, finite element models using explicit software LS-DYNA which can accurately replicate the response of the frames were created and validated. Using the validated model, the parametric studies were also performed to investigate the effect of different parameters on the progressive collapse resistance of the frame. Base on the experimental and numerical studies, the failure mechanism and collapse resistance capacities of these two types of frame systems are first time investigated. The test results indicated that the welded connections with RBS exhibits better performance due to the guaranteed formation of plastic hinges at the location of reduced section, as well as the avoidance of welding heat effect and brittle weld fracture at beam to column connections. Thus, RBS exhibits larger deformation capacity which is favorable in mitigating the possible progressive collapse.

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“…The analysis results showed the dynamic response of the removed member under the seismic load is entirely dependent on the seismic characteristics such as the energy applied to the structure, the maximum ground acceleration, and the frequency content. Lin et al [16] presented a new method for evaluating steel momentresisting frames against blast loads. This method was compared with other common methods.…”

Section: Introductionmentioning

confidence: 99%

Evaluating the effect of Buckling-Restrained Braces in Steel Buildings against Progressive failure using Different Simulation Strategies

Maragheh

Jalali

Mirhosseini

2021

IJE

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A new method for progressive collapse analysis of steel frames

Cited by 18 publications

References 13 publications

Fatigue Assessment of Old Riveted Railway Bridges: Laboratory Testing of a Real Bridge

Fatigue Assessment of Old Riveted Railway Bridges: Laboratory Testing of a Real Bridge

Progressive collapse resistance of two-storey seismic configured steel sub-frames using welded connections

Evaluating the effect of Buckling-Restrained Braces in Steel Buildings against Progressive failure using Different Simulation Strategies

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