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Capacity-Based Inelastic Displacement Spectra for Seismic Evaluation and Design of Reinforced Concrete Bridges
Abstract Capacity-based inelastic displacement spectra that comprise an inelastic displacement ( $$ C_{R} $$ ) spectrum and a corresponding damage state ( $$ DI $$ ) spectrum are proposed to aid seismic evaluation and design of reinforced concrete bridges. Nonlinear time history analyses of SDOF systems are conducted using a versatile smooth hysteretic model that accounts for the influences of various column design parameters when subjected to far-field and near-fault ground motions. The computed spectra show that the $$ C_{R} $$ for far-field ground motions approximately conforms to the equal displacement rule for structural period ( $$ T_{n} $$ ) larger than around 0.8 s and that for near-fault ground motions departs from the rule in all spectral regions. Moreover, most of the design scenarios investigated in this research cannot survive the near-fault ground motions when relative strength $$ R = $$ 5.0. Based on the computed spectra, $$ C_{R} $$ and $$ DI $$ formulae are presented as a function of $$ T_{n} $$ , $$ R $$ , and various design parameters for far-field and near-fault ground motions, respectively.
Capacity-Based Inelastic Displacement Spectra for Seismic Evaluation and Design of Reinforced Concrete Bridges
Abstract Capacity-based inelastic displacement spectra that comprise an inelastic displacement ( $$ C_{R} $$ ) spectrum and a corresponding damage state ( $$ DI $$ ) spectrum are proposed to aid seismic evaluation and design of reinforced concrete bridges. Nonlinear time history analyses of SDOF systems are conducted using a versatile smooth hysteretic model that accounts for the influences of various column design parameters when subjected to far-field and near-fault ground motions. The computed spectra show that the $$ C_{R} $$ for far-field ground motions approximately conforms to the equal displacement rule for structural period ( $$ T_{n} $$ ) larger than around 0.8 s and that for near-fault ground motions departs from the rule in all spectral regions. Moreover, most of the design scenarios investigated in this research cannot survive the near-fault ground motions when relative strength $$ R = $$ 5.0. Based on the computed spectra, $$ C_{R} $$ and $$ DI $$ formulae are presented as a function of $$ T_{n} $$ , $$ R $$ , and various design parameters for far-field and near-fault ground motions, respectively.
Capacity-Based Inelastic Displacement Spectra for Seismic Evaluation and Design of Reinforced Concrete Bridges
Chang, Kuo-Chun (author) / Wang, Ping-Hsiung (author) / Ou, Yu-Chen (author)
Concrete Structures in Earthquake ; 329-350
2019-01-01
22 pages
Article/Chapter (Book)
Electronic Resource
English
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