It is of high importance in seismic retrofitting of lateral load-bearing systems to increase the connections performance. The crucial point in the steel frame retrofitting process is to create plastic hinges in these types of frames. The formation of plastic hinges in beams and near columns generates large strains on column flanges as well as welding metal and heated surroundings, which can lead to brittle failure. ; The connection should be designed in such a way as to allow plastic hinge formation at certain points of the beam. One such method suggested for retrofit connections is to reduce the beam section locally away from the connection zone. There are various patterns available to locally reduce the beam section, such as circular, elliptical, and symmetric/asymmetric. In recent years, different proposals have been presented to design these connections which vary from older instructions. ; For this study, radiused cuts in the flange and slotted holes in the web of connection beams were selected for retrofitting analysis. Cyclic behavior, energy damping levels, and ductility of these connections were studied and compared before and after the retrofit by using nonlinear dynamic analysis. The results showed that the symmetrical circular hole pattern in the beam flanges demonstrated reliable performance.
tytuł dodatkowy: Prace z Inżynierii Lądowej i Środowiska
Zielona Góra: Oficyna Wydawnicza Uniwersytetu Zielonogórskiego
Civil and Environmental Engineering Reports (CEER), no 29, vol. 4
Biblioteka Uniwersytetu Zielonogórskiego
2023-03-20
2023-03-20
50
https://zbc.uz.zgora.pl/publication/79474
Nazwa wydania | Data |
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Performance Assessment of Steel Moment Connections Retrofitted With Various Reduced Section Patterns | 2023-03-20 |
Niyonyungu, Ferdinand Noroozinejad, Farsangi Ehsan Kuczyński, Tadeusz - red.
Sakharov, Volodymyr Kuczyński, Tadeusz - red.
Ovchynnykov, Pavlo Dubinchyk, Olha Tiutkin, Oleksii Kildieiev, Vitalii Sedin, Vladimir Bikus, Kateryna Kuczyński, Tadeusz - red.
Seyedi, Marghaki Behnaz Soltani, Fazlollah Noroozinejad, Farsangi Ehsan Sivandi-Pour, Abbas Kuczyński, Tadeusz - red.
Khene, Ahmed Mesbah, Habib Abdelhak Chikh, Nasr-Eddine Kuczyński, Tadeusz - red.
Szewczyk, Piotr Szumigała, Maciej Kuczyński, Tadeusz - red.
Wierzbicki, Krzysztof Szumigała, Maciej Kuczyński, Tadeusz - red.
Marcinowski, Jakub Różycki, Zbigniew Kuczyński, Tadeusz - red.