Probabilistic seismic demand model for curved reinforced concrete bridges

Tondini, Nicola; Stojadinović, Božidar

doi:10.1007/s10518-012-9362-y

Cited by 77 publications

(26 citation statements)

References 18 publications

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“…The output of the PSDA model is a demand hazard curve that is analogous to a seismic hazard curve (from probabilistic seismic hazard analysis, PSHA). Since the demand hazard curve is an essential component of the probabilistic performance-based seismic design framework [20], PSDA has been frequently used for assessing building structures [21,22] and bridge structures [23,24].…”

Section: Probabilistic Methodology 21 Related Workmentioning

confidence: 99%

Multi-Hazard Assessment of Seismic and Scour Effects on Rural Bridges with Unknown Foundations

Guo¹,

Dai²,

Chen³

2019

Earthquakes - Impact, Community Vulnerability and Resilience

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This chapter proposes a probabilistic framework for assessing seismic and scour effects on existing river-crossing bridge structures. The emphasis is on bridge structures in rural areas, for which it has been recognized that a large number of rural bridges have unknown foundation types and further are subject to both flooding-induced scour and seismic damage. With a review of the US-based rural bridges, this chapter presents a probabilistic framework for bridge performance assessment. Using a representative rural bridge model, the fragility results for the bridge reveal that scour tends to be beneficial in reducing structural damage at slight to moderate seismic intensities and to be detrimental in increasing collapse potential at high-level intensities. The demand hazard curves further quantify probabilistically the occurrence of local damage and global collapse, and systematically reveal the complex effects of scour as a hydraulic hazard on bridge structures.

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Section: Probabilistic Methodology 21 Related Workmentioning

confidence: 99%

Multi-Hazard Assessment of Seismic and Scour Effects on Rural Bridges with Unknown Foundations

Guo¹,

Dai²,

Chen³

2019

Earthquakes - Impact, Community Vulnerability and Resilience

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“…In this study, the relative maximum displacement ductility of piers (denoted as μd) is selected as the EDP to represent the global demand of the bridge which describes the overall bridge behaviour under seismic loading [14]. Its definition is as follows…”

Section: Probabilistic Seismic Demand Analysis 41 Selection Of Enginmentioning

confidence: 99%

Identification of the Most Fragile Component for a Typical RC Bridge Using Seismic Fragility Curves

2020

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This paper identifies the most fragile component of a typical reinforced concrete (RC) continuous girder bridge through the seismic fragility analysis. The typical bridge, Liang-Zi River bridge located in Shandong Province of China, is taken as the case study. The Cloud analysis approach is adopted to construct the probabilistic seismic demand models (PSDMs). Both of the record-to-record uncertainty in ground motions and the structural model uncertainty are considered in the PSDMs by using several approaches such as the selection of real ground motion records from the NGA-West2 database and the Latin Hypercube Sampling (LHS) approach. The damage limit states defined refer to piers and bearings which are commonly regarded as the fragile components. Furthermore, the seismic fragility curves of components and the bridge system are developed. Results show that the middle piers are more fragile than the side piers; the bearings are more fragile than piers; it is different from experiences that the fixed bearings at the top of the middle pier are not always more fragile than sliding bearings at both of the transverse and longitudinal loading conditions.

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“…The proposed six‐degree‐of‐freedom dynamic model is utilized to demonstrate the capability of the proposed SEMFD to limit the in‐plane rigid‐body motion of decks of horizontally curved bridges. Figure shows the structural drawing of the bridge prototype, which is a prestressed response control horizontally curved bridge consisting of a box‐girder deck and four single‐column bents that are monolithically connected to the deck. More details on the calculation of the parameters of the dynamic model of the bridge prototype can be found in the previous publication of the authors .…”

Section: Semiactive Control Of a Horizontally Curved Bridgementioning

confidence: 99%

Feasibility study of using a semiactive electromagnetic friction damper for seismic response control of horizontally curved bridges

Amjadian

Agrawal

2019

Struct Control Health Monit

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Summary Semiactive control systems have been found to be more effective than passive and active control systems for seismic protection of bridges because of their reliable and adaptable characteristics. This paper presents a comprehensive investigation on the modeling and design of a semiactive electromagnetic friction damper (SEMFD) for the seismic response control of horizontally curved bridges. The proposed SEMFD possesses a simple configuration consisting of a ferromagnetic plate and two arrays of ferromagnetic core coils (FCs) attached to the two sides of the ferromagnetic plate through two friction pads. The attractive magnetic interaction between the FCs arrays and the ferromagnetic plate creates the normal force, which generates friction force as the friction pads and the ferromagnetic plate move relative to each other. The magnitude of this force can be controlled by varying the control current passing through the FCs. This semiactive controller, designed based on the optimal linear quadratic Gaussian control method, is capable of reducing the undesirable effects of stick–slip motion in the damper, while restoring the piston of the SEMFD to its initial position at the end of the excitation. The capability of the proposed SEMFD to mitigate the rigid‐body motion of decks of horizontally curved bridges is demonstrated by implementing it into the dynamic model of a horizontally curved bridge prototype. The numerical results indicate that the proposed SEMFD is effective in limiting the motion of the deck and thereby preventing it from unseating, which is one of the most common modes of failure among horizontally curved bridges.

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Probabilistic seismic demand model for curved reinforced concrete bridges

Cited by 77 publications

References 18 publications

Multi-Hazard Assessment of Seismic and Scour Effects on Rural Bridges with Unknown Foundations

Multi-Hazard Assessment of Seismic and Scour Effects on Rural Bridges with Unknown Foundations

Identification of the Most Fragile Component for a Typical RC Bridge Using Seismic Fragility Curves

Feasibility study of using a semiactive electromagnetic friction damper for seismic response control of horizontally curved bridges

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