Seismic Retrofit with Relocatable Braces
-Speedy Construction to Anchor Braces to Existing Frames with Prestressing Scheme-
By M. Ohno, T. Katayama, E. Nagai and T. Maeda
Concrete Journal, Vol.47, No.12, Dec. 2009
- Synopsis
- To have the construction of anchor unnecessary which prolongs the term of works, causes a vibration, a noise,and dust, etc under construction, the brace that has the multilayer spring element at the edge with prestressed beforehand is set up in the existing frame, and it puts on pressure to the existing frame by liberating the prestress power afterwards. It detaches from the existing frame by introducing the prestress power again after it sets it up and it is possible to transfer it. About the force evaluation-proof, the performance confirmation examination was done, and the validity of the design formula was confirmed. In this report, it reports on the design approach, the performance confirmation examination, and the application example
- Keywords:
- design method, construction method, seismic reinforcement, no-anchor method, relocatable brace
