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Featured researches published by Kazuo Kondoh.


Archive | 1986

Large Deformation and Post-Buckling Analyses of Plane and Space Truss Structures

Kazuo Kondoh; Kazunari Tanaka

A simple and useful expression for the tangent stiffness matrix of a truss undergoing arbitrarily large deformation, as well as member’s buckling, is given. An arc length method is used to solve the tangent stiffness equations in the post-buckling range of the structural deformation. Numerical examples to illustrate the viability of the present approach in analyzing truss structures, simply, efficiently, and accurately, are given.


Journal of Structural and Construction Engineering (transactions of Aij) | 2012

DEVELOPMENT OF HYBRID STRESS FINITE ELEMENTS BASED ON THE BEAM-COLUMN THEORY FOR FRAME STRUCTURES WITH WALL MEMBERS

Yukio Kitano; Kazuo Kondoh

The purpose of the present study is to develop the new series of hybrid stress finite elements based on the beam-column theory, and to construct the structures analysis system, for wall structures and/or frame structures with wall members. Outline and construction of the present structures analysis system are summarized. Using the ordinary assumed displacement finite element, the Winkler’s spring element is formulated in addition to hybrid stress Timoshenkos beam-column, 2D and connection elements that has been shown in the previous papers. Also, several numerical tests are performed, and the availability and the applicability of the present structures analysis system and/or approach are, discussed and examined.


Journal of Structural and Construction Engineering (transactions of Aij) | 2012

A EXPERIMENT ON FULL-SIZE MODELS OF THE WOODEN TRADITIONAL STRUCTURE WITH THE IMPROVED EARTHQUAKE-RESISTANT DEVICES

Takeshi Kawachi; Osamu Sadahiro; Makoto Kimura; Atsuko Fukumoto; Kazuo Kondoh

Experiments on traditional wooden structures with devices to improve earthquake performance are performed. Devised points are as follows. 1) Kashira-nuki and Nageshi are improved and employed as structural elements. 2) Boards of wooden siding wall, in which are Chikara-nuki and Chikara-ita arranged by turns, is developed. Following things become to be clear as results. 1) The larger the column axial-force becomes to be, strength and stiffeness of Kashira-nuki increase. 2) Nageshi increases strength of structure by 1.5 times in the case with no Nageshi. 3) Wooden siding wall increases strength of structure by 3 times in the case without one.


Journal of Structural and Construction Engineering (transactions of Aij) | 2011

ELASTO-PLASTIC BEHAVIOR ANALYSIS REMARKING ON SKELETON AND STEADY HYSTERETIC CHARACTERISTICS OF STEEL PLANE FRAME STRUCTURES SUBJECTED TO REPEATED VARIABLE LOADS

Kazuo Kondoh

     ������������������������� �������������      ����                  � � � � � �  � � �  � � � � � � � � � �  � � � �   � � � � ��������������������������  �� �� � ������ ��������������������� �������������� ����������� ������������������������������ ��������� ���������������� ������������������������������ ������������������������������ ���������������������� ��� ������������������������������ ������������������������������ ������������������������������ ������������������������������ ������������������������������ ������������������������������� ������������� �� �������������� ������������������������������ ������� ����������������������������� ������������������������������ ������������������������������ ������������������������������ ���������� ������������������ ������������������������������ ������������������ ���������� ������������������������������ ������������������������������ ������������������������������ ������������������������������ ������������������������������ ���������������������� ����������������������������� ������������������������������ ������������������������������ ������������������������������ �������������������������� ����������������������������� ������������������������������ ������������������������������ ������������������������������ ����� � ������������ ������ ������������������������������ ������������������������������ ������������������������������ ������������������������������ ������������������������������ ������������������������������ ���������������� 


Journal of Structural and Construction Engineering (transactions of Aij) | 2010

ANALYSIS OF WALL WITH AN OPENING BY HYBRID STRESS 2D FINITE ELEMENTS BASED ON THE PLANE BEAM-COLUMN THEORY

Yukio Kitano; Akihiro Tanaka; Kazuo Kondoh

A new and effective hybrid stress 2D finite element based on the plane beam-column theory considering higher order shear deformation and the bi-axial effect in stresses and strains was developed, in the previous papers. In this paper, the availability and applicability of the present 2D finite element, for the walls and/or the portal frames with the wall elements, are discussed and examined. The behavior of the wall with a square opening are analyzed and are compared the photoelasticity experiment results by Tokuhiro etc. Also, the parametric studies on the size of square opening or the size of boundary column are performed, and might specify their influence and effect on the responsive characteristics of the wall with an opening.


Archive | 1995

Quadrilateral Mindlin Plate Bending Element Using Continuous Shear Constraint

Kazuo Kondoh; Masami Hanai

Using the concept of continuous shear constraint, an improved assumed displacement finite element method for shear-deformable plate bending element, its basic adeas being given in the authors’ previous reports, is developed. A new series of quadrilateral plate bending elements is unified and systematically derived. It is shown that the plate bending elements of the present family have no spurious zero energy modes and are “locking-free” , with verification of the convergence criteria to be satisfied. Several numerical analyses show that the present elements have excellent accuracy and convergency for both thin and thick plates.


Archive | 1988

Large Deformation, Post-Buckling Analyses of Large Space Frame Structures, Using Explicitly Derived Tangent Stiffness Matrices

Kazuo Kondoh; Masami Hanai; Satya N. Atluri

Large deformation and post-buckling analyses of structures have been studied by many researchers as an important subject in structural mechanics in the past decade or so. In all their studies, an incremental approach, either of the total Lagragean type or the updated Lagragean type, is employed. As the incremental approach is often based on the so-called tangent stiffness matrix, which reflects all the non-linear geometrical and mechanical effects, the majority of non-linear analyses of typical engineering structures, and especially truss- and frame-type large space structures, will be vastly simplified if an explicit expression (i.e., without involving assumed basis functions for displacements/stresses, and without involving element-wise numerical integrations) for the tangent stiffness matrix of an element can be derived.


Kou kouzou rombunshuu | 1994

Application of Low Yield Stress Steel to K-braced Frame with Hysteretic Damper

Hiroyuki Tamai; Hiroyuki Takenaka; Kazuo Kondoh; Yuuji Nakamura; Masami Hanai


Journal of Structural and Construction Engineering (transactions of Aij) | 1994

ON LOW-CYCLE FATIGUE CHARACTERISTICS OF HYSTERETIC DAMPER AND ITS FATIGUE LIFE PREDICTION UNDER SEVER EARTHQUAKE GROUND MOTION

Hiroyuki Tamai; Kazuo Kondoh; Masami Hanai


Journal of Structural and Construction Engineering (transactions of Aij) | 1998

INELASTIC COLLAPSE ANALYSIS OF REINFORCED CONCRETE FRAMED STRUCTURES USING THE HYBRID STRESS FINITE ELEMENTS

Yuji Inada; Yasuhiro Kawabata; Kazuo Kondoh; Hiroyuki Tamai; Tetsuzo Kaku

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Hiroyuki Tamai

Hiroshima Institute of Technology

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Tetsuzo Kaku

Toyohashi University of Technology

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