Box Column – H-Beam Steel Moment Frame Structures for High Performance Earthquake-Resistant Buildings & Tsunami Evacuation Towers

Abstract eng:
It is said that 10% of the earthquakes in the world occur in the vicinity of Japan. As a result, Japan has been accumulating much knowledge and technology with regard to earthquake-resistant building structures. Among various high-technologies, one of the most conventional and economical idea is the "Box column – H-beam moment frame steel structure". It is one of the two-way moment frame structural system design in which we can reduce the size and weight of the structure compared to the concrete structure (RC in the following) or other steel structures. We can also design with the longer span and, if necessary, we can eliminate the brace to provide larger open space and more designing flexibility for the building. Because of those values, this structural design has been one of the standards for multiple-story commercial buildings in earthquake-prone Japan for more than three decades. Although immense damages were brought by the Great East Japan Earthquake on March 2011, no major damage to the main structural parts of “Box column – H-beam moment frame structure” caused by the earthquake and tsunami was found as a result of a survey. This structural system had supported whole structures not only against the earthquake load but also against the tsunami load such as the hydraulic pressure or those from being hit by drifting debris.

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