Experimental Cyclic Behavior of Precast Hybrid Beam-Column Connections with Welded Components
| Autor: | Ibrahim Serkan Misir, Serap Kahraman, Sadik Can Girgin |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Engineering
0211 other engineering and technologies 020101 civil engineering Ocean Engineering 02 engineering and technology Welding 0201 civil engineering law.invention Seismic analysis beam-column connections Flexural strength law Precast concrete lcsh:Systems of building construction. Including fireproof construction concrete construction 021105 building & construction medicine lcsh:TH1000-1725 Civil and Structural Engineering welding Structural material precast concrete business.industry Structural mechanics Stiffness Structural engineering unbonded length medicine.symptom damage index business Beam (structure) |
| Zdroj: | International Journal of Concrete Structures and Materials, Vol 11, Iss 2, Pp 229-245 (2017) |
| Popis: | Post-earthquake observations revealed that seismic performance of beam-column connections in precast concrete structures affect the overall response extensively. Seismic design of precast reinforced concrete structures requires improved beam-column connections to transfer reversed load effects between structural elements. In Turkey, hybrid beam-column connections with welded components have been applied extensively in precast concrete industry for decades. Beam bottom longitudinal rebars are welded to beam end plates while top longitudinal rebars are placed to designated gaps in joint panels before casting of topping concrete in this type of connections. The paper presents the major findings of an experimental test programme including one monolithic and five precast hybrid half scale specimens representing interior beam-column connections of a moment frame of high ductility level. The required welding area between beam bottom longitudinal rebars and beam-end plates were calculated based on welding coefficients considered as a test parameter. It is observed that the maximum strain developed in the beam bottom flexural reinforcement plays an important role in the overall behavior of the connections. Two additional specimens which include unbonded lengths on the longitudinal rebars to reduce that strain demands were also tested. Strength, stiffness and energy dissipation characteristics of test specimens were investigated with respect to test variables. Seismic performances of test specimens were evaluated by obtaining damage indices. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|