Influence of model parameter uncertainties on the seismic vulnerability analysis of continuous steel-concrete composite bridges exhibiting dual-load paths

E. Tubaldi, M. Barbato, A. Dall'Asta

Research output: Contribution to conferenceOther

Abstract

The performance of multi-span steel-concrete composite bridges in recent seismic events has shown that these structures are very sensitive to earthquake loading. Following the Performance-Based Earthquake Engineering (PBEE) framework, the vulnerability assessment of these systems must take rigorously into account all pertinent sources of uncertainty, including uncertainties in the loading and in the structural/ mechanical/geometrical properties (model parameter uncertainty). The model parameter uncertainty affects not only the structural capacity, but also the Engineering Demand Parameters (EDPs). However, most of the procedures for fragility calculation focus on the variability of EDPs due to input ground motion uncertainty (record-to-record variability) and neglect model parameter uncertainty effects, or incorporate these effects only in a simplified way. This paper aims at studying the effects of model parameter uncertainty on the seismic response and on the seismic vulnerability of steel-concrete composite bridges with abutment transverse restraints. In this paper, the Extended Incremental Dynamic Analysis (EIDA) method is used to account for all sources of aleatoric uncertainty. EIDA is applied to a benchmark SCC bridge system with dual load path to estimate the first- and second-order statistics of the EDPs of interest, to assess the sensitivity of the structural response to the model parameter uncertainty, and to evaluate the seismic vulnerability accounting for all pertinent sources of uncertainty.

Conference

Conference5th International Conference on Bridge Maintenance, Safety and Management, IABMAS 2010
CountryUnited States
CityPhiladelphia, PA
Period11/07/1015/07/10

Fingerprint

Composite bridges
Concrete bridges
vulnerability
steel
Steel
dynamic analysis
engineering
Dynamic analysis
structural response
earthquake engineering
Uncertainty
parameter
analysis
Abutments (bridge)
seismic response
ground motion
Seismic response
mechanical property
Earthquakes
earthquake

Keywords

  • bridge systems
  • earthquake loadings
  • ground motion uncertainty
  • incremental dynamic analysis
  • load paths
  • model parameters
  • multi-spans
  • performance-based earthquake engineering
  • second order statistics
  • seismic event
  • seismic vulnerability
  • sources of uncertainty
  • steel-concrete composite
  • structural capacities
  • structural response
  • vulnerability assessments, Composite bridges
  • maintenance
  • safety engineering
  • seismology
  • uncertainty analysis

Cite this

Tubaldi, E., Barbato, M., & Dall'Asta, A. (2010). Influence of model parameter uncertainties on the seismic vulnerability analysis of continuous steel-concrete composite bridges exhibiting dual-load paths. 2224-2231. 5th International Conference on Bridge Maintenance, Safety and Management, IABMAS 2010, Philadelphia, PA, United States.
Tubaldi, E. ; Barbato, M. ; Dall'Asta, A. / Influence of model parameter uncertainties on the seismic vulnerability analysis of continuous steel-concrete composite bridges exhibiting dual-load paths. 5th International Conference on Bridge Maintenance, Safety and Management, IABMAS 2010, Philadelphia, PA, United States.8 p.
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title = "Influence of model parameter uncertainties on the seismic vulnerability analysis of continuous steel-concrete composite bridges exhibiting dual-load paths",
abstract = "The performance of multi-span steel-concrete composite bridges in recent seismic events has shown that these structures are very sensitive to earthquake loading. Following the Performance-Based Earthquake Engineering (PBEE) framework, the vulnerability assessment of these systems must take rigorously into account all pertinent sources of uncertainty, including uncertainties in the loading and in the structural/ mechanical/geometrical properties (model parameter uncertainty). The model parameter uncertainty affects not only the structural capacity, but also the Engineering Demand Parameters (EDPs). However, most of the procedures for fragility calculation focus on the variability of EDPs due to input ground motion uncertainty (record-to-record variability) and neglect model parameter uncertainty effects, or incorporate these effects only in a simplified way. This paper aims at studying the effects of model parameter uncertainty on the seismic response and on the seismic vulnerability of steel-concrete composite bridges with abutment transverse restraints. In this paper, the Extended Incremental Dynamic Analysis (EIDA) method is used to account for all sources of aleatoric uncertainty. EIDA is applied to a benchmark SCC bridge system with dual load path to estimate the first- and second-order statistics of the EDPs of interest, to assess the sensitivity of the structural response to the model parameter uncertainty, and to evaluate the seismic vulnerability accounting for all pertinent sources of uncertainty.",
keywords = "bridge systems, earthquake loadings, ground motion uncertainty, incremental dynamic analysis, load paths, model parameters, multi-spans, performance-based earthquake engineering, second order statistics, seismic event, seismic vulnerability, sources of uncertainty, steel-concrete composite, structural capacities, structural response, vulnerability assessments, Composite bridges, maintenance, safety engineering, seismology, uncertainty analysis",
author = "E. Tubaldi and M. Barbato and A. Dall'Asta",
note = "cited By 0; 5th International Conference on Bridge Maintenance, Safety and Management, IABMAS 2010 ; Conference date: 11-07-2010 Through 15-07-2010",
year = "2010",
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pages = "2224--2231",

}

Tubaldi, E, Barbato, M & Dall'Asta, A 2010, 'Influence of model parameter uncertainties on the seismic vulnerability analysis of continuous steel-concrete composite bridges exhibiting dual-load paths' 5th International Conference on Bridge Maintenance, Safety and Management, IABMAS 2010, Philadelphia, PA, United States, 11/07/10 - 15/07/10, pp. 2224-2231.

Influence of model parameter uncertainties on the seismic vulnerability analysis of continuous steel-concrete composite bridges exhibiting dual-load paths. / Tubaldi, E.; Barbato, M.; Dall'Asta, A.

2010. 2224-2231 5th International Conference on Bridge Maintenance, Safety and Management, IABMAS 2010, Philadelphia, PA, United States.

Research output: Contribution to conferenceOther

TY - CONF

T1 - Influence of model parameter uncertainties on the seismic vulnerability analysis of continuous steel-concrete composite bridges exhibiting dual-load paths

AU - Tubaldi, E.

AU - Barbato, M.

AU - Dall'Asta, A.

N1 - cited By 0

PY - 2010

Y1 - 2010

N2 - The performance of multi-span steel-concrete composite bridges in recent seismic events has shown that these structures are very sensitive to earthquake loading. Following the Performance-Based Earthquake Engineering (PBEE) framework, the vulnerability assessment of these systems must take rigorously into account all pertinent sources of uncertainty, including uncertainties in the loading and in the structural/ mechanical/geometrical properties (model parameter uncertainty). The model parameter uncertainty affects not only the structural capacity, but also the Engineering Demand Parameters (EDPs). However, most of the procedures for fragility calculation focus on the variability of EDPs due to input ground motion uncertainty (record-to-record variability) and neglect model parameter uncertainty effects, or incorporate these effects only in a simplified way. This paper aims at studying the effects of model parameter uncertainty on the seismic response and on the seismic vulnerability of steel-concrete composite bridges with abutment transverse restraints. In this paper, the Extended Incremental Dynamic Analysis (EIDA) method is used to account for all sources of aleatoric uncertainty. EIDA is applied to a benchmark SCC bridge system with dual load path to estimate the first- and second-order statistics of the EDPs of interest, to assess the sensitivity of the structural response to the model parameter uncertainty, and to evaluate the seismic vulnerability accounting for all pertinent sources of uncertainty.

AB - The performance of multi-span steel-concrete composite bridges in recent seismic events has shown that these structures are very sensitive to earthquake loading. Following the Performance-Based Earthquake Engineering (PBEE) framework, the vulnerability assessment of these systems must take rigorously into account all pertinent sources of uncertainty, including uncertainties in the loading and in the structural/ mechanical/geometrical properties (model parameter uncertainty). The model parameter uncertainty affects not only the structural capacity, but also the Engineering Demand Parameters (EDPs). However, most of the procedures for fragility calculation focus on the variability of EDPs due to input ground motion uncertainty (record-to-record variability) and neglect model parameter uncertainty effects, or incorporate these effects only in a simplified way. This paper aims at studying the effects of model parameter uncertainty on the seismic response and on the seismic vulnerability of steel-concrete composite bridges with abutment transverse restraints. In this paper, the Extended Incremental Dynamic Analysis (EIDA) method is used to account for all sources of aleatoric uncertainty. EIDA is applied to a benchmark SCC bridge system with dual load path to estimate the first- and second-order statistics of the EDPs of interest, to assess the sensitivity of the structural response to the model parameter uncertainty, and to evaluate the seismic vulnerability accounting for all pertinent sources of uncertainty.

KW - bridge systems

KW - earthquake loadings

KW - ground motion uncertainty

KW - incremental dynamic analysis

KW - load paths

KW - model parameters

KW - multi-spans

KW - performance-based earthquake engineering

KW - second order statistics

KW - seismic event

KW - seismic vulnerability

KW - sources of uncertainty

KW - steel-concrete composite

KW - structural capacities

KW - structural response

KW - vulnerability assessments, Composite bridges

KW - maintenance

KW - safety engineering

KW - seismology

KW - uncertainty analysis

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M3 - Other

SP - 2224

EP - 2231

ER -

Tubaldi E, Barbato M, Dall'Asta A. Influence of model parameter uncertainties on the seismic vulnerability analysis of continuous steel-concrete composite bridges exhibiting dual-load paths. 2010. 5th International Conference on Bridge Maintenance, Safety and Management, IABMAS 2010, Philadelphia, PA, United States.