Role of Damage Functions in Evaluation of Response Modification Factors

Decanini, Luis D.; Bruno, Silvia; Mollaioli, Fabrizio

doi:10.1061/(asce)0733-9445(2004)130:9(1298)

Cited by 17 publications

(6 citation statements)

References 24 publications

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“…Negro 43 provided the suggestions on β for reinforced concrete (RC) frame structures. This manuscript aims to provide a general tool to estimate the damage of systems under the MSAS ground motions; thus, different values of β (ie, β = 0.05, 0.10, 0.15, 0.20, and 0.25) 35,37,38,[43][44][45][46][47] are used here to study the effects of β on the damage spectra of MSAS ground motions.…”

Section: Effects Of β and μ Umentioning

confidence: 99%

Damage spectra of global crustal seismic sequences considering scaling issues of aftershock ground motions

Wang

Zhai

2018

Earthq Engng Struct Dyn

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Summary Recent studies and earthquakes have shown that the mainshock‐aftershock (MSAS) sequences would induce significant cumulative damage, and it is urgent to incorporate the MSAS sequences into performance‐based seismic design and resilience assessment. For this purpose, one of the key problems is how to accurately and quickly estimate the cumulative damage induced by MSAS sequences. This manuscript investigates the damage spectra of global crustal MSAS sequences and proposes a prediction equation of damage spectra as a tool to quantify the cumulative damage caused by MSAS sequences. The recorded MSAS ground motions from global crustal seismic sequences are collected. The structures are modeled by 4 different kinds of single degree of freedom systems with/without degradation and pinching behavior. The scaling indicator and scaling factor SF of aftershock ground motions are studied from the point of view of efficiency and accuracy. The results indicate that scaling aftershock ground motions with spectra acceleration Sa present the best efficiency. Applying the condition of SF smaller than or equal to 5.0 (ie, SF ≤ 5.0) can clearly reduce the bias induced by over‐scaling and meanwhile has no change on the dispersion of results. Strong aftershocks (eg, relative Sa greater than 0.8) can increase the damage spectra by the minimum level of 20% for non‐degrading systems, and quantitative effects of aftershocks strongly depend on the period of vibration, strength reduction factor, hysteretic behavior, and intensity of the aftershock ground motions. The proposed prediction equation shows high accuracy on the estimation of the cumulative damage induced by MSAS sequences.

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Section: Effects Of β and μ Umentioning

confidence: 99%

Damage spectra of global crustal seismic sequences considering scaling issues of aftershock ground motions

Wang

Zhai

2018

Earthq Engng Struct Dyn

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“…In this section, the proposed spectra are compared with those of previous studies . Suggested spectrum by Chai et al is the first model used in the comparison analysis.…”

Section: Proposed Simplified Equation For Rdsmentioning

confidence: 99%

“…Decanini et al defined the strength reduction factors based on damage measures and calculated strength reduction factors for damage level DI = 1.0. They proposed a simplified expression for the generation of constant‐damage spectra of strength reduction factors as follows:

R_{D} = \frac{φ_{1} μ_{u} T^{1.2}}{φ_{2} + T^{1.2}} + 1,

where φ 1 and φ 2 are constant regression coefficients to account for the effect of different site conditions and hysteretic models.…”

Section: Proposed Simplified Equation For Rdsmentioning

confidence: 99%

“…In conjunction with the recent development of new damage indices, damage‐based strength reduction factors have been introduced in the literature as an appropriate parameter to establish constant‐damage spectra. The recommended damage‐based inelastic response spectra can be classified into direct (e.g., ) and indirect (e.g., ) damage‐based spectra. The indirect damage‐based relations indicate that the cumulative damage might be taken into account in determining the strength reduction factor (SRFs) through the modification of ductility demand, which leads to an appropriate R μ − μ − T relation, while direct damage‐based expressions utilize a direct damage model for determination of the seismic demand at various damage levels .…”

Section: Introductionmentioning

confidence: 99%

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Development of duration‐dependent damage‐based inelastic response spectra

Yaghmaei‐Sabegh

Makaremi

2016

Earthq Engng Struct Dyn

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A simple relationship is proposed in this paper to construct damage-based inelastic response spectra including the effect of ground motion duration that it can be used for damage control in seismic design of structures. This relation is established for three groups of ground motions with short-duration, moderate-duration, and long-duration ranges. To develop the model, the duration effect is included in the cyclic ductility of structures by an energy-based method, and then strength reduction factors are computed based on this modified ductility (named R Ds ). The strength reduction factors were calculated for 44 stiffness-degrading oscillators having vibration periods between 0.05 and 4.0 s, four ultimate ductility capacities, and five damage levels subjected to 296 earthquake records. The results showed that ductility capacity, damage level, and ground motion duration are effective parameters in the energy dissipation of structures, which affect the R D s spectra. The R D s values of short-period oscillators (e.g., low-rise structures) under short-duration records are generally greater than those under moderate-duration and long-duration records. Residual analysis has been made in terms of magnitude and distance to examine the validity of the proposed simple expression. Finally, the introduced R D s spectra were compared with three previously published proposals.

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“…The more reliable strength demand should be associated with the damage, and other structural properties such as stiffness and ductility classes (capacity). The influence of cyclic excursions and cumulative damage on the strength reduction in structures subjected to seismic loading has been evidenced in many recent studies (Fajfar 1992;Vidic and Fajfar 1995;Teran-Gilmore 1996;Krätzig and Meskouris 1997;Warnitchai and Panyakapo 1999;Tiwari and Gupta 2000;Teran-Gilmore and Avila 2001;Decanini et al 2004).…”

Section: Damage Evaluation At Structural Levelmentioning

confidence: 96%

Damage-based seismic design and performance assessment of reinforced concrete structures

Wei¹

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Inspections after major earthquakes in the last two decades revealed that most buildings designed to conform to modern seismic design codes could survive moderate to severe earthquakes; however, the high level of spread structural damage was often excessively costly to repair. To address the concerns about economical losses, the concept of performance based seismic design (PBSD) emerged. Within the general framework of PBSD, the design and evaluation of building structures on the basis of quantified damage constitutes a fundamental aspect. However, there is still a lack of effective and systematic methodology for the quantification of structural damage and implementation of the quantified damage in the design and evaluation process for real applications. Besides, as a special class of seismic performance evaluation, there is a significant lack of understanding of the likely damage to nonseismically designed structures in low-tomoderate seismicity regions, considering the actual seismic behaviour of such type of structures and a realistic seismic demand. This thesis is aimed to address some of the important aspects within the framework of PBSD, with focus on the damage-based design and evaluation, including nonseismically designed structures. Both analytical and experimental studies are ' c f Concrete cylinder compressive strength y f Yield strength of the longitudinal bar

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Role of Damage Functions in Evaluation of Response Modification Factors

Cited by 17 publications

References 24 publications

Damage spectra of global crustal seismic sequences considering scaling issues of aftershock ground motions

Damage spectra of global crustal seismic sequences considering scaling issues of aftershock ground motions

Development of duration‐dependent damage‐based inelastic response spectra

Damage-based seismic design and performance assessment of reinforced concrete structures

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