The behavior of beam-column (B-C) connections received thorough investigation during the past decades focusing on critically-detailed connections before and after strengthening. Exposure of such B-C connections to thermal shock due to subjected to cycles of heating–cooling such as in chimneys, concrete foundations for launching rockets carrying spaceships, concrete near to furnace, clinker silos and nuclear power plants, or those subjected to fire then extinguished using water would aggravate the weakness of the high joint zone. In this study, systematic nonlinear finite element analyses (NLFEA) were conducted using ANSYS to evaluate the effects of the level of the column axial load and thermal shock impact which is a parameter difficult to evaluate experimentally due to limitations in loading machines and requirement for complicated testing setups. A total of eight NLFEA models were created, calibrated and properly verified with reputable experimental literature results. The NLFEA results showed that both level of the column axial load and thermal shock impact significantly affect the cracks distribution, failure mode, ultimate load capacity, and ductility of the B-C connection. Column axial load levels up to 75 % were advantageous to the behavior of virgin B-C connections. The lateral load capacities, net drifts, hysteresis loops, cracks distribution, energy dissipation, and failure modes were presented.

• Behavior of B-C connections damaged by thermal shock
  • 1. Introduction
  • 2. Methods
    • 2.1. Experimental Work Review
    • 2.2. Description of Non-linear Finite Element Analysis (NLFEA)
    • 2.3. Investigated Parameters
    • 2.4. Validation Process
  • 3. Results and Discussion
    • 3.1. Failure Mode
    • 3.2. Horizontal load-displacement hysteretic loops
    • 3.3. Horizontal load-displacement envelopes
    • 3.4. Ultimate horizontal load corresponding net drift displacement
    • 3.5. The displacement ductility
    • 3.6. Energy dissipation
    • 3.7. Secant stiffness degradation
    • 3.8. Comparison of NLFEA with other results
  • 4. Conclusions

Magazine of Civil Engineering / Санкт-Петербургский политехнический университет Петра Великого. — Санкт-Петербург: СПбПУ, 2020-. — Периодичность: 8 раз в год. — Выходит с 2020 г. — Загл. с титул. экрана. — Свободный доступ из сети Интернет (чтение, печать, копирование). — Электрон. журнал. — Текст: электронный

Magazine of Civil Engineering / Санкт-Петербургский политехнический университет Петра Великого. — Санкт-Петербург: СПбПУ, 2020-. № 7 (99), 2020. — 1 файл (12,9 Мб). — Свободный доступ из сети Интернет (чтение, печать, копирование). — Электрон. журнал. — <URL:http://elib.spbstu.ru/dl/2/j21-196.pdf>.