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  About Steel Structure...

During most of the period from the introduction of structural steel as a major material, the steel used usefully. Metals such as structural steel that undergo large permanent strain before failure are classified as ductile, for instance, ductility is the property that enables a bar of steel to be bent into a circular arc or drawn into a wire without breaking. A desirable feature of ductile masterials is that visible distoritions occur if the roads become too large, thus providing an opportunity to take remedial action before an actual fracture occurs. Also, materials exhibiting ductile behavior are capable of absorbing large amounts of strain energy prior to fracture. Today, we use it as a major material because of such a reason.

Structures may be divided into three general categories: (a)frame structures, where elements may consist of tension members, columns, beams, and members under combined bending and axial load: (b)shell-type structures, where axial forces predominate: and (c)suspension-type structures, where axial tension predominates the principal support system.
  Introduction

- The research of thin-walled structures
- The research of the seismic engineering
- The research of railway systems

In this laboratory, researches are focused on new economical design and the study of steel structures and high strength thin-walled structures by means of theoretical, numeri- cal, experimental analysis.
Also, collaborating with Seismic Engineering Laboratory, the standard design for earth- quake proof has been lively studied.
  Main Research

- A buckling behavior of thin-walled mono-symmetric arch.
- A buckling behavior of steel curved I girder flange.
- A study of vibration characteristic of horizontally curved I girder.
- A study of 2D buckling analysis of continuous welded rail.
- A study of structural system for seismic design
- A study of the seismic design and the specification for foundation isolation.
- The development of mono-curvature shell element for out of plane and a study of non-
   linear analysis.
- The development of program for curved box girder considering influence surface and a
   study of miniature experiment.
- A buckling of a elastically supported mono-symmetric I girder.
- The development of seismic retrofitting method and seismic design for bridges
- The new concept for top reinforced design of decks on steel I-girder bridges.
- The development of applied design and efficiency of various seismic device for bridge.