Kazuo Kondoh
Hiroshima University
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Featured researches published by Kazuo Kondoh.
Archive | 1986
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
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
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
Kazuo Kondoh
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Journal of Structural and Construction Engineering (transactions of Aij) | 2010
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
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
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
Hiroyuki Tamai; Hiroyuki Takenaka; Kazuo Kondoh; Yuuji Nakamura; Masami Hanai
Journal of Structural and Construction Engineering (transactions of Aij) | 1994
Hiroyuki Tamai; Kazuo Kondoh; Masami Hanai
Journal of Structural and Construction Engineering (transactions of Aij) | 1998
Yuji Inada; Yasuhiro Kawabata; Kazuo Kondoh; Hiroyuki Tamai; Tetsuzo Kaku