The multi-column pile foundation which has been employed at the Ohnaruto-Bridge in the Honsyuu-Shikoku Bridge, was the first real structure in Ja pan that made use of the center column pile with 7 meters in diameter . By using of the case-study of the Ohnaruto-Bridge in this thesis, in order to establish the method of design, the model experiment on a large scale and it's theoretical study were excuted and this property has been proved.

抄録全体を表示

The reliability-based design methodology for the transmission high-pressure gas pipeline is described. Limit state design criterion is introduced for the lifetime risk assessment in the seismic environment, while the maintenance activities including field patrols, periodic inspections and repairs are also taken into consideration. Pipe damages, which are caused by potential defect, corrosion, earthquake ground displacement, settlement and the third party accident, are classified into three major damage modes which include tension/compression, bending and dent with gouge. The assessment is made for the transmission pipeline system which is surrounded with various hazards spatially distributed along the pipeline route.

抄録全体を表示

The behavior of cantilever H-beam for welded structure subjected to monotonic and cyclic loads is investigated. Both bending test of cantilever beam and analysis based on Finite Element Method (FEM) considering the geometrical and material non-linearities are utilized. Special attention is paid to the effect of local buckling occurring in bottom flange and web on the deformabity of H-beam. The performance of H-beam is examined with respect to the strength, ductility and absorbed energy . It is generally found that the large anti-plane deformation due to the buckling in web occurs before buckling in bottom flange in the case of thick web. That is, control of web geometry is able to improve the performance of H-beam without the increase in weight of the beam . In the case of thin web, buckling in web occurs in the low deformation range just full owing buckling in bottom flange . In this case, web is so thin that control of web geometry for performance is not effective without weight increase . The same tendency can be observed under cyclic load.

抄録全体を表示

This paper describes the summary of structural design method of "OOI-MACHI STATION BUILDING" constructed at Ooimachi-Station, Tokyo, in 1993. This building is a over-track building to utilize the aerial spase over railways, KeihinTohoku-line and Tokaido-line. Due to the limited construction site nearby tracks, this building is structurally characterized by having no footing beems in the trasverse direction of the tracks. On the basis of the experimental study of column-pile connection and lateral-load tests of concrete-filled steel pipe piles, we established a new structural design method of this type of structure .

抄録全体を表示

ACT TOWER, ACT CITY HAMAMATSU, has a large setback at a height of 120m, where the hotel lies over the office part . There are three main themes in the structural design. The first is the solution to use a Super truss for the framing of the setback part . The second is that the site is located in a very high seismic area. Evaluated earthquake waves are made considering this, and the design is checked. And the third is the wind resistant design. It is confirmed that the building behavior is almost elastic for the case of a storm in 500 years return period. Semi-active mass dampers are set up to improve comfortability for the case of strong winds within a year.

抄録全体を表示