The conventional methods for earthquake-resistant structural design use high strength or high ductility concepts to mitigate damage from seismic effects. In the first case, corresponding to shear wall structures, generally the design is problematic in that their fundamental frequency of vibration is in the range of frequencies where earthquake energy is the strongest, resulting in a very high floor acceleration, which may cause damage to equipment or machinery. The second, the capacity design method, incorporates that a part of the energy transmitted into the structure by. an earthquake is dissipated by plastic deformations. The capacity method mostly used for flexible structures as frames, provided that plastic deformations occurred in structural elements, which are designed to undergo such large deformations. Therefore, the design of such yielding zones has to be planned carefully. However, this concept may lead to a very high interstory drift, causing P-Δ effects and damage to non-structural elements. Thus, the costs for retrofitting or strengthening after a strong earthquake can be very high. An alternative approach consists in isolating the structure base from the ground by using rubber bearings.
Weitere Kapitel dieses Buchs durch Wischen aufrufen
- Dynamic Behaviour of High Damping Rubber Bearings for Building Seismic Isolation
Prof. Dr.-Ing. Dr.-Ing. E.h. Dr. techn. h.c. Josef Eibl
- Springer Netherlands