On the Inelastic Displacement Response Spectra on the Maximum Ground Motions and the Seismic Safety of Low & Mid-rise Buildings in Japan and U.S.
By T. Shimazu
Concrete Journal, Vol.45, No.6, Jun. 2007
- Synopsis
- This paper, first, explains come features of the inelastic deformation response spectra for the maximum ground motions ever recorded (1995 JMA Kobe NS, 1994 Sylmar EW and 1985 Mexico SCT EW), using the Japan and U.S. current prediction methods at the same time. The parameters dealt with are periods of SDOF systems, the restoring force characteristics and ductility factors. It is pointed out that the considerably high design strength is required for low & mid-rise buildings to meet the control pf building drifts in a remarkable contrast to the case of high-rise buildings.
Second, the structural design examples of low & mid-rise reinforced concrete buildings are compared between Japan and U.S., based on the above results. It is emphasized that the use of short columns should be avoided, taking into considerations the balanced layout of structural walls in both the transverse and longitudinal directions in structural design of low & mid-rise buildings in Japan. - Keywords:
- maximum horizontal displacement, building periods, restoring force characteristics, yield strength, inelastic dynamic analysis, response spectrum, building drift, structural layout
