エンケイ コウカンチュウ オヨビ Hケイ コウリョウ オ モツ ソトダイアフラム セツゴウブ ノ リキガクテキ トクセイ ヒョウカ

Evaluation equations of external diaphragm connection with steel circular hollow section columns and wide flange steel beams, to include initial stiffness, yield strength, post yield stiffness and maximum strength, were deduced from regression analysis. Finally, the verification of the estimations with typical frames was conducted. As a result, the evaluation equations were useful to trace the behavior of the semi-rigid steel frame with external diaphragm connections

2ホウコウ カラ スイヘイリョク オ ウケル リッタイ ブブン ホネグミ ノ ダンソセイ セイジョウ ニ カンスル ケンキュウ

This paper describes about elastic-plastic characteristics of steel frames, which are made of circular columns and wide flange beams, connected with external diaphragms. It is known that local deformation occurs at the end of beam in this type of the connection. The local deformation is generated by a couple of forces at both heights of the beam flange. In this study, a finite element analysis package program is used to study the property of the three-dimensional frame under biaxial lateral force. The number of researches that made the planar frame to be an object is abounding, and it of researches that handled three-dimensional frame is slight. It is difficult to execute the researches of the three-dimensional frame because it needs a lot of time and labor

Applicability on Static-Dynamic Verification Method for Seismic Design of Steel Tubular Bridge Piers with Cruciform Plates

 Steel tubular bridge pier with inner cruciform plates has high seismic performance. In this paper, the applicability of static-dynamic verification method for seismic design of steel tubular bridge piers with inner cruciform plates is studied. The ultimate strength and state of steel tubular stub columns with inner cruciform plate subjected to compression and bending were investigated through finite element analysis. The validity of the proposed design formula of the failure strain which was obtained from the stub column analysis was examined by analysis on tubular steel bridge piers with inner cruciform plates under cyclic loading. The dynamic response analysis of the same steel bridge piers was carried out on the basis of the spring-mass model and the fiber element model. These results indicated the static-dynamic verification method of the seismic response analysis through the spring-mass model are good agreement with dynamic verification method of seismic response analysis by the fiber element model

Applicability on Static-Dynamic Verification Method for Seismic Design of Steel Tubular Bridge Piers with Cruciform Plates

 Steel tubular bridge pier with inner cruciform plates has high seismic performance. In this paper, the applicability of static-dynamic verification method for seismic design of steel tubular bridge piers with inner cruciform plates is studied. The ultimate strength and state of steel tubular stub columns with inner cruciform plate subjected to compression and bending were investigated through finite element analysis. The validity of the proposed design formula of the failure strain which was obtained from the stub column analysis was examined by analysis on tubular steel bridge piers with inner cruciform plates under cyclic loading. The dynamic response analysis of the same steel bridge piers was carried out on the basis of the spring-mass model and the fiber element model. These results indicated the static-dynamic verification method of the seismic response analysis through the spring-mass model are good agreement with dynamic verification method of seismic response analysis by the fiber element model