Improved response factor methods for seismic fragility of reactor building

Ozaki, Masahiko; Okazaki, Akira; Tomomoto, K.; Iba, T.; Satoh, R.; Nanba, H.; Seya, Hitoshi; Moriyama, K.; Ugata, Takeshi

doi:10.1016/s0029-5493(98)00237-4

Cited by 14 publications

(2 citation statements)

References 2 publications

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“…e use of carbonization depth as parameter ignores the cross-sectional size effect and environmental impact of the actual component. To consider the size effect of component sections and reasonably reflect the evolution law of mechanical properties of concrete after carbonization, the relative carbonization area [34] of the concrete section is selected as the parameter to study the performance of carbonized concrete. e carbonation rate of concrete can be calculated using the following equation:…”

Section: Research On Mechanicalmentioning

confidence: 99%

Seismic Response Analysis of Pier considering Durability Damage Repair

Liang

Mao

et al. 2020

Advances in Civil Engineering

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At present, most of the research studies on the seismic performance of the durability degraded reinforced concrete structure only consider the influence of a single factor. This paper comprehensively considers the factors such as concrete carbonization, steel corrosion, and bond slip performance degradation caused by other durability factors and durability damage repair and studies the influence of the above factors on the seismic performance of bridge structures. Based on the finite element model considering the bond slip and the material parameters of time-varying durability damage, the seismic performance analysis model of the pier is established considering material durability damage repair in different service periods. Then, the effect of material durability damage repair on the seismic performance of the pier is examined. The results show that the displacement of the pier top increases, the curvature of the pier bottom decreases, and the moment-curvature curve pinching phenomenon is further evident when considering the bond slip. When considering the durability damage repair of materials, the curvature considerably decreases (the maximum value is approximately 16.04%) with the extension of the service time of the bridge, and the pier damage is substantially reduced.

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Section: Research On Mechanicalmentioning

confidence: 99%

Seismic Response Analysis of Pier considering Durability Damage Repair

Liang

Mao

et al. 2020

Advances in Civil Engineering

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“…The current research results [Lam, Wong and Poon (2000)] indicate that the method of using carbonization depth as a parameter neglects the effect of cross-section size and environmental impact of actual components. We combine the research method of concrete carbonization by Ozaki et al [Ozaki, Okazaki, Tomomoto et al (1998)] and select the relative carbonization area of concrete section as the parameter to study the performance of carbonized concrete. In addition, we consider the size effect of the component section and reflect the evolution law of mechanical properties of concrete after carbonization reasonably.…”

Section: Analysis On the Properties Of Carbonated Concretementioning

confidence: 99%

Seismic Fragility Analysis of Long-Span Bridge System with Durability Degradation

Liang¹,

Yana²,

Cheng³

et al. 2019

Computer Modeling in Engineering &Amp; Sciences

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An offshore long-span continuous rigid-frame bridge is taken as an example to study the effect of degradation of bond-slip behavior on the seismic performance of bridges in an offshore environment during a service period. On the basis of a numerical simulation analysis using the OpenSeeS platform, the influence of durability degradation of concrete carbonization, steel corrosion, and degradation of bond-slip performance is considered collectively using incremental dynamic analysis method to examine the time-varying seismic fragility of the offshore bridge. Results show that when bond slip is considered, the exceedance probability of the bridge components and the system increases significantly, and the durability degradation caused by concrete carbonization and chloride ion erosion in the whole life cycle increases the seismic response of the bridge structure. The results of the proposed time-varying seismic fragility analysis indicate that, considering the degradation of bond-slip behavior of reinforced concrete after the durability degradation of materials, the exceedance probability of the pier, bearing, abutment, and system increases with the extension of service period and the increase in seismic strength under earthquake action. In addition, with the extension of service time, the effect of bond slip on the seismic fragility of components and system gradually decreases.

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