Effects of randomness in structural members' yield strength on the structural systems' ductility

Kuwamura, Hitoshi; Kato, Ben

doi:10.1016/0143-974x(89)90007-2

Cited by 10 publications

(8 citation statements)

References 3 publications

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“…Also, initial indications of the influence of parameter uncertainty on global mechanisms may be evaluated from pushover analyses, as carried out by Kuwamura and Kato. 32…”

Section: Step 1: Identifying Cases Where Failure Mode Variability May...mentioning

confidence: 99%

Impact of failure mode uncertainty on seismic fragility and collapse risk of buildings

Opabola,

Liel,

Elwood

2024

Earthq Engng Struct Dyn

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Laboratory tests on nominally identical reinforced concrete (RC) components have demonstrated the existence of failure mode variability and its significant impact on the strength and deformation capacity of RC components. In comparison with record‐to‐record and modeling uncertainties, the impact of failure mode uncertainty on the seismic fragility of RC structural systems has received less attention. This study presents a methodology for propagating failure mode variability in the probabilistic seismic assessment of RC structural systems. In the proposed methodology, strength hierarchy calculations are used to identify the structural system's susceptibility to failure mode variability. Subsequently, a number of segregate models corresponding to the number of failure mode combinations are developed. Nonlinear response history analyses of the segregates are used to quantify each segregate's seismic fragility and risk. Finally, the total probability theorem is used to derive the combined seismic fragility of the structure. The proposed methodology is demonstrated using an older‐type (pre‐1970s) four‐story RC frame building archetype with ground floor columns susceptible to failure mode switch between flexure‐ and flexure‐shear mechanisms. The results show that the seismic fragility and collapse risk of the RC buildings with failure mode variability significantly changes when failure mode variability is propagated. In the example, accounting for component‐level failure mode variability can shift the median collapse fragility by more than 20%. Furthermore, the collapse risk (i.e., probability of collapse in 50 years) of the archetype changed by at least 30%. Similar changes may be observed in other types of structures with significant failure mode uncertainty, not limited to RC structures.

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“…Also, initial indications of the influence of parameter uncertainty on global mechanisms may be evaluated from pushover analyses, as carried out by Kuwamura and Kato. 32…”

Section: Step 1: Identifying Cases Where Failure Mode Variability May...mentioning

confidence: 99%

Impact of failure mode uncertainty on seismic fragility and collapse risk of buildings

Opabola,

Liel,

Elwood

2024

Earthq Engng Struct Dyn

View full text Add to dashboard Cite

show abstract

“…From the probabilistic point of view, the fulfillment of the design criterion (7) with a given probability level Φ requires the condition ζ φ ≥ 0 to be satisfied leading to the following relationship: (11) which provides:…”

Section: Proposed Probabilistic Approachmentioning

confidence: 99%

“…Regarding the influence of random material variability, which affects both the beam flexural resistance and the beam-to-column joint moment resistance, it has been already investigated with reference to the seismic inelastic behaviour of steel frames [11][12][13][14][15][16][17][18], but assuming that the beam-tocolumn joints do not represent any "frame imperfection", i.e. under the assumption of rigid-full strength beam-to-column joints.…”

Section: Introductionmentioning

confidence: 99%

Random material variability effects on full-strength end-plate beam-to-column joints

Piluso

Rizzano

2007

Journal of Constructional Steel Research

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“…As a result of these differences in critical material response parameters, the suitability of these new steels for use with plastic analysis and design methodology has been questioned. A portion of the current research examines the impact of varying the steel yield stress alone on Case 8 are considered (see Figure 5 and Table 2).…”

Section: Materials Effects On Single Angle Compactnessmentioning

confidence: 99%

Practical Compactness and Bracing Provisions for the Design of Single Angle Beams

Earls,

Galambos

1998

Eng J

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Effects of randomness in structural members' yield strength on the structural systems' ductility

Cited by 10 publications

References 3 publications

Impact of failure mode uncertainty on seismic fragility and collapse risk of buildings

Impact of failure mode uncertainty on seismic fragility and collapse risk of buildings

Random material variability effects on full-strength end-plate beam-to-column joints

Practical Compactness and Bracing Provisions for the Design of Single Angle Beams

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