Seismic Comparison between the two 12-story-office Building
Examples Designed in Accordance with the Seismic Provisions of Japan and U.S.
Codes respectively
By T. Shimazu
Concrete Journal, Vol.44, No.11, Nov. 2006
- Synopsis
- This paper, first, outlines the two 12-story-office- building examples designed in accordance with the Japan seismic provisions (allowable stress-based type design) and the U.S. seismic provisions of IBC 2000, respectively. The building structural layout, properties of material, design shear story and drift along height are explained. The detailed reinforcement of beams, columns and walls, finally determined through calculation is also illustrated. Second, the seismic resistance of both the design examples are evaluated using unreduced design spectrum of both Japan and U.S. seismic provisions as well as the highest ground motions recorded during the 1994 Northridge earthquake and the 1995 Hyogoken-Nanbu earthquake. The seismic performance of four tall steel buildings located near the epicenter during the 1994 Northridge earthquake are also introduced. Finally, it is concluded that the most important factor for more than 10 story buildings, that is to say, for buildings longer periods more than 1 sec. to survive major earthquake is not the strength level but the deformation capability of buildings and that U.S. type building structures composed of more slender beams and columns will be more suitable to absorb such strong earthquake motions.
- Keywords:
- design process, design shear forces, deflection amplification factors, design acceleration spectrum, the highest ground motions recorded, acceleration-displacement response spectrum, drift limitations
