Deterioration Modeling of Steel Moment Resisting Frames Using Finite-Length Plastic Hinge Force-Based Beam-Column Elements

Ribeiro, Filipe L. A.; Barbosa, André R.; Scott, Michael H.; Neves, Luís

doi:10.1061/(asce)st.1943-541x.0001052

Cited by 27 publications

(14 citation statements)

References 23 publications

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“…In both models, columns are modeled using nonlinear force‐based fiber‐section beam‐column elements in which an elasto‐plastic constitutive law with a 3% kinematic hardening is assigned to each fiber. Beams are modeled using a force‐based finite length plastic‐hinge beam‐column element , which models plastic hinge length explicitly and separates the behavior of beam in the span from that of beam‐column connections. Both models use the modified Gauss–Radau integration scheme.…”

Section: Building Modelsmentioning

confidence: 99%

“…When a finite‐length plastic‐hinge element is used, a plastic hinge length of L p = L /6(where L is the beam span) should be used to recover the exact solution for the case of a fixed–fixed beam column element . Otherwise, a plastic‐hinge calibration approach is warranted for recovery of the elastic and inelastic stiffness . All other model parameters are defined as proposed by Lignos and Krawinkler .…”

Section: Building Modelsmentioning

confidence: 99%

See 1 more Smart Citation

Influence of earthquake ground‐motion duration on damage estimation: application to steel moment resisting frames

Barbosa

Ribeiro

Neves

2016

Earthq Engng Struct Dyn

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SUMMARYThis paper presents an analytical study evaluating the influence of ground motion duration on structural damage of 3-story, 9-story, and 20-story SAC steel moment resisting frame buildings designed for downtown Seattle, WA, USA, using pre-Northridge codes. Two-dimensional nonlinear finite element models of the buildings are used to estimate the damage induced by the ground motions. A set of 44 ground motions is used to study the combined effect of spectral acceleration and ground motion significant duration on drift and damage measures. In addition, 10 spectrally equivalent short-duration shallow crustal ground motions and long-duration subduction zone records are selected to isolate duration effect and assess its effect on the response. For each ground motion pair, incremental dynamic analyses are performed at at least 20 intensity levels and response measures such as peak interstory drift ratio and energy dissipated are tracked. These response measures are combined into two damage metrics that account for the ductility and energy dissipation. Results indicate that the duration of the ground motion influences, above all, the combined damage measures, although some effect on drift-based response measures is also observed for larger levels of drift. These results indicate that because the current assessment methodologies do not capture the effects of ground motion duration, both performance-based and code-based assessment methodologies should be revised to consider damage measures that are sensitive to duration.

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Section: Building Modelsmentioning

confidence: 99%

Section: Building Modelsmentioning

confidence: 99%

Influence of earthquake ground‐motion duration on damage estimation: application to steel moment resisting frames

Barbosa

Ribeiro

Neves

2016

Earthq Engng Struct Dyn

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“…Beams are modeled using (1) Finite-Length Plastic Hinge (FLPH) elements [Scott and Fenves (2006); Ribeiro, Barbosa, Scott et al (2015)] for simulating beam nonlinear response, including strength and stiffness deterioration of the beams, and (2) zero-length springs to simulate the nonlinear behavior of connections. Columns are modeled using force-based fiber-section distributed plasticity finite elements, a common assumption as the SAC buildings have rather stocky columns.…”

Section: Modelingmentioning

confidence: 99%

Fragility Assessment of Pre-Northridge Steel Moment Frames Using Finite-Length Plastic Hinge Elements and Concentrated Plasticity Fracture Elements

Ribeiro¹,

Barbosa²,

Neves³

2019

Computer Modeling in Engineering &Amp; Sciences

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Although pre-Northridge earthquake steel moment resisting frame buildings have been shown to be susceptible to brittle connection failures, they still represent a large fraction of the existing steel buildings in the United States of America. In this study, the performance of the 3-and 9-story Los Angeles pre-Northridge SAC buildings are analyzed considering ductile and brittle beam-column connection failures, and their uncertainty. This paper contributes to understanding the influence of uncertainty associated with connections brittle fracture on building interstory deformation capacity and its impact on bias and variability of fragility functions and loss assessment. The results show that considering brittle connections leads to significantly larger drift demands and to higher repair costs, particularly under intense ground shaking. New fragility curve parameters are derived that account for the effect of the uncertainty of the strength and deformation capacity of brittle connections.

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“…Plastic hinge length was selected as 1/6 of beam length such that no correction of moment of inertia (for the elastic portion of the beam element) is required for this special case (Ribeiro 2015). ASCE 41 modeling parameters for welded unreinforced flange (WUF) beam-to-column connections are used as default input to simulate the connection behavior.…”

Section: Mathematical Modelingmentioning

confidence: 99%

“…Beams are modeled using force-based nonlinear beamcolumn elements with finite-length plastic hinges at both ends as proposed by Ribeiro et al (Ribeiro 2015), and the hysteresis uniaxial material in OpenSees is used to model the moment-curvature behavior of plastic hinge locations and used with the fatigue material wrapper to account for low cycle fatigue. Plastic hinge length was selected as 1/6 of beam length such that no correction of moment of inertia (for the elastic portion of the beam element) is required for this special case (Ribeiro 2015).…”

Section: Mathematical Modelingmentioning

confidence: 99%

Evaluating and improving the seismic performance of older tall buildings

Mahin¹,

Lai²,

Wang³

et al. 2015

Proceedings of the Second International Conference on Performance-Based and Life-Cycle Structural Engineering (PLSE 2015)

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The seismic performance of new tall buildings located in regions of high seismic hazard has been recently investigated by Pacific Earthquake Engineering Research (PEER) Center under its Tall Buildings Initiative (TBI) program. The Tall Building Initiative has now expanded to assess the seismic performance of existing tall buildings. Buildings being considered are 20 stories or more in height, and constructed on the West Coast of the U.S. between about 1960 and 1990. During this period, several hundred tall buildings were constructed in California, but earthquake-resistant design procedures had not yet been fully developed. From these structures, a 35-story steel building, designed in 1968, and having representative details from that period, was selected for evaluation. In this paper, results of three-dimensional nonlinear analysis models developed to assess the seismic performance of this structure are presented. Two earthquake hazard levels are used for the evaluation. Structural analysis results are interpreted to assess the impact of suspected deficiencies on seismic response, and the ability of different evaluation guidelines, numerical models and analysis methods to identify seismic vulnerabilities. A feasible retrofit strategy was identified. Recommendations are offered for further research and guideline evaluation.

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Deterioration Modeling of Steel Moment Resisting Frames Using Finite-Length Plastic Hinge Force-Based Beam-Column Elements

Cited by 27 publications

References 23 publications

Influence of earthquake ground‐motion duration on damage estimation: application to steel moment resisting frames

Influence of earthquake ground‐motion duration on damage estimation: application to steel moment resisting frames

Fragility Assessment of Pre-Northridge Steel Moment Frames Using Finite-Length Plastic Hinge Elements and Concentrated Plasticity Fracture Elements

Evaluating and improving the seismic performance of older tall buildings

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