Fragility analysis of rectangular and circular reinforced concrete columns under bidirectional multiple excitations
نویسندگان
چکیده
This paper presents a numerical investigation on seismic performance of reinforced concrete (RC) cantilever columns under unidirectional and bidirectional excitations. The influence cross-sectional geometry multiple excitations have been examined in this study. An advanced nonlinear finite element model is employed to different failure modes RC excitation. simulates degradation materials cyclic loading, including inelastic buckling low-cycle fatigue longitudinal reinforcement. A series monotonic pushover incremental dynamic analyses (IDA) are conducted hypothetical rectangular circular columns. Proposing unique algorithm, an existing inclusive damage index implemented quantify the sources flexural, shear reinforcement slippage Ground motion records carefully selected using conditional mean spectrum (CMS) generate as-recorded real mainshock aftershock (MSAS) sequences. Results show that significantly increase accumulates Moreover, bars evident contribution It also found column more prone collapse loading comparison section. results impact excitation studied considerable. implies assessment structures can be biased.
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ژورنال
عنوان ژورنال: Engineering Structures
سال: 2021
ISSN: ['0141-0296', '1873-7323']
DOI: https://doi.org/10.1016/j.engstruct.2021.111887