Seismic Retrofit of RC Circular Columns Using Prefabricated Composite Jacketing

Xiao, Yan; Ma, Rui

doi:10.1061/(asce)0733-9445(1997)123:10(1357)

Cited by 194 publications

(65 citation statements)

References 6 publications

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“…Study by Cho and Pincheira (2006) indicated that FEMA 356 underestimates the lapped rebar stress. Using bond-slip models are a proven method for inelastic analysis of RC columns with lap-splice failure (Xiao and Ma 1997;Harajli et al 2002;Cho and Pincheira 2006). However, bond-slip model could not be directly incorporated in the numerical model, since a zero length stress-displacement section was not available.…”

Section: Nonlinear Numerical Model Detailsmentioning

confidence: 99%

“…To achieve this, the stress-strain relationship of the longitudinal steel reinforcement for lap spliced reinforcement was reduced to simulate the expected backbone of lateral force-displacement relationship. It's noteworthy to mention that the Xiao model (Xiao and Ma 1997) could be used to establish the average bond stresslateral displacement relationship for columns with lapspliced reinforcement in the as-built and with the consideration of the lateral confining pressure conditions in retrofitted ones, and then reduce the steel properties accordingly. When ignoring the lap-splice, monotonically increasing lateral force-displacement relationship with ascending postpeak behavior was observed.…”

Section: Nonlinear Numerical Model Detailsmentioning

confidence: 99%

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Collapse Vulnerability and Fragility Analysis of Substandard RC Bridges Rehabilitated with Different Repair Jackets Under Post-mainshock Cascading Events

Fakharifar

Chen

Dalvand

et al. 2015

International Journal of Concrete Structures and Materials

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Past earthquakes have signaled the increased collapse vulnerability of mainshock-damaged bridge piers and urgent need of repair interventions prior to subsequent cascading hazard events, such as aftershocks, triggered by the mainshock (MS). The overarching goal of this study is to quantify the collapse vulnerability of mainshock-damaged substandard RC bridge piers rehabilitated with different repair jackets (FRP, conventional thick steel and hybrid jacket) under aftershock (AS) attacks of various intensities. The efficacy of repair jackets on post-MS resilience of repaired bridges is quantified for a prototype two-span singlecolumn bridge bent with lap-splice deficiency at column-footing interface. Extensive number of incremental dynamic time history analyses on numerical finite element bridge models with deteriorating properties under back-to-back MS-AS sequences were utilized to evaluate the efficacy of different repair jackets on the post-repair behavior of RC bridges subjected to AS attacks. Results indicate the dramatic impact of repair jacket application on post-MS resilience of damaged bridge piers-up to 45.5 % increase of structural collapse capacity-subjected to aftershocks of multiple intensities. Besides, the efficacy of repair jackets is found to be proportionate to the intensity of AS attacks. Moreover, the steel jacket exhibited to be the most vulnerable repair intervention compared to CFRP, irrespective of the seismic sequence (severe MS-severe or moderate AS) or earthquake type (nearfault or far-fault).

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Section: Nonlinear Numerical Model Detailsmentioning

confidence: 99%

Section: Nonlinear Numerical Model Detailsmentioning

confidence: 99%

Collapse Vulnerability and Fragility Analysis of Substandard RC Bridges Rehabilitated with Different Repair Jackets Under Post-mainshock Cascading Events

Fakharifar

Chen

Dalvand

et al. 2015

International Journal of Concrete Structures and Materials

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“…The strain components were calculated iteratively while satisfying equilibrium and bond stress equations concurrently [16]. The adopted constitutive relationship of bond stress and slip depends on maximum bond stress and maximum slip [17]. Since the confining stresses primarily affect the bond stresses and corresponding slips for deformed reinforcement pertinent to splitting type of bond failure, the confining stresses were taken as zero as it would merely affect the bond behavior of plain rebars.…”

Section: Spliced Steel Modelmentioning

confidence: 99%

Stiffness Modeling of Rc Columns Reinforced With Plain Rebars

Özcan¹

2015

Proceedings of the 5th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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“…[2][3][4], among many others), this is not true for columns with hollow-core cross section, despite their widespread use transportation infrastructures. Only quite recently, attention has been paid to experimental cyclic response of hollow columns: relatively few experimental studies, especially if compared with columns with solid cross section, are available in literature.…”

Section: Introductionmentioning

confidence: 99%