Seismic Performance of Knee Braced Frames with Self-Centering Beam-Column Joints
碩士 === 國立中央大學 === 土木工程學系 === 101 === Knee braced moment resisting frame (KBRF) has been developed in recent years. It has been demonstrated that the stiffness and strength of KBRF can be significantly improved when knee braced members are used. However, buckling of knee brace member at large deforma...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2013
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| Online Access: | http://ndltd.ncl.edu.tw/handle/78816859311726486429 |
| Summary: | 碩士 === 國立中央大學 === 土木工程學系 === 101 === Knee braced moment resisting frame (KBRF) has been developed in recent years. It has been demonstrated that the stiffness and strength of KBRF can be significantly improved when knee braced members are used. However, buckling of knee brace member at large deformation causing strength reduction is a concern when the KBRF design is adopted. This study focused on the performance enhancement of KBRFs by using the combinations of self-centering knee braces and self-centering beam-to-column connections. A series of cyclic loading tests on the self-centering KBRF structures with various magnitudes of post-tension in the brace members and beam-to-column connections were conducted.
It was found from the tests that the strength and deformation capabilities of the self-centering KBRFs were effectively sustained. It is also observed from the tests that the energy dissipation of the KBRFs was significantly enhanced when friction energy dissipation plates were used.
Test results confirmed that the self-centering capacity of the structures could be effectively sustained as long as the post-tension mechanism remained elastic. It is suggested from the tests that longer post-tension bars be adopted in the self-centering knee braces and connections, so that higher structural deformation capability could be achieved.
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