Seismic assessment and rehabilitation of a RC structure under mainshock-aftershock seismic sequences using beam-column bonded CFRP strategy

Soureshjani, Omid Karimzade

doi:10.1007/s10518-022-01382-3

Cited by 4 publications

(4 citation statements)

References 43 publications

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“…As expected, the seismic sequences caused plastic strain as well as an increase in the drift ratio (cumulative damage), chiefly in story one [25,26,42]. Story one experienced the highest drift ratio and plastic strain and showed the greatest difference between the 3D solid model and equivalent shell-wire model results.…”

Section: Inter-story Drift Ratiosupporting

confidence: 67%

“…The initial damage criteria of the material (concrete or steel rebars) depended on the specific strength. For ductile material (steel rebars), when the stress reached its limits, the evolution of the damage variable took an exponential form according to the fraction strain, strain rate, and displacement at failure [18,[25][26][27]. Experimental studies have shown that brittle material (concrete) under either compression or tension, the initial damage, damage evolution, or cumulative damage could be linked to the model provided by Lubliner et al [28].…”

Section: Cumulative Damage (Damage Evolution)mentioning

confidence: 99%

“…Thus, it was assumed that the compressive stiffness recovered entirely when the load changed from tension to compression. Under tensile loading, however, the stiffness did not recover because of the existence of small cracks [25,26,29,30].…”

Section: Cumulative Damage (Damage Evolution)mentioning

confidence: 99%

“…In this method, the sequences were empirically determined using the data sequences from previous earthquakes and by measurement of the space-time history [39]. The magnitude of the mainshock should be greater than that of the aftershock and there are no limitations for peak ground acceleration (PGA) but the ratio of aftershock PGA to mainshock PGA of the sequences was considered to be less than 1 for this study [25,26].…”

Section: Seismic Sequence Selectionmentioning

confidence: 99%

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Seismic Assessment of RC Shear Wall Structure under Real Seismic Sequences Using Equivalent Shell-Wire Model

Soureshjani¹,

Massumi²

2022

Civil Engineering

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Shear walls are commonly used in areas with moderate to high seismic hazards. They are cost-effective, simple, and significantly reduce the relative displacement. Accurate non-linear assessments of shear wall structures require highly detailed models and finite element (FE) analyses. The inclusion of analyses on the cumulative damage and damage evolution like seismic sequences adds a higher level of complexity to the assessments. Here, an equivalent shell-wire model is used to propose a simple, accurate technique with less computational cost. The areas under the capacity curves were modeled using 3D solid and equivalent shell-wall models and revealed only a 4.48% difference with a 50% difference in computational cost. The hysteresis curves of the experimental and equivalent shell-wire models showed good agreement. To examine the cumulative damage, damage evolution, strength and stiffness degradation of the model, a six-story structure was designed and analyzed under seven mainshocks-aftershocks in both cases of 3D solid and equivalent shell-wire models. The results showed that increasing the plastic strain or damage increased the difference between the results of the models, but this was negligible. Besides the accurate and appropriate results of the equivalent shell-wire model, it required about 39% less computational cost than the 3D solid model.

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Section: Inter-story Drift Ratiosupporting

confidence: 67%