Masaru Shimazu

• Doctor of Engineering
• Professor (Associate) at Oita University

In this paper, the shear strength of circular reinforced concrete (RC) columns was obtained using numerical models based on a modified compression field theory that enabled the sectional analysis of the beams. By comparing the computational results with previous experimental results, we were able to assess the suitability of this numerical model fo...

An accurate plastic hinge type beam elememt has been developed by the authors for three-dimensional (3-D) elastoplastic large deformation analysis of frames which contain all kinds of members: i.e. steel members, RC members, SRC members, CFT members, PC members, steel damper braces and tension braces. The element was originally proposed for pure st...

A plastic hinge type beam element for three-dimensional analysis of prestressed concrete beams and frames is presented. The element was originally proposed for pure steel frames and named "Fibered Plastic Hinge Model". The formulation procedure is a combination of the "modified incremental stiffness method", the updated Lagrangian formulation, and...

An algorithm for elastoplastic seismic response analysis of a steel frame is presented and its reliability is examined by using the experimental results for full-scale 4-story steel building. The masses of members, slabs and attachments are lumped to the beam-column connection points in principle for dynamic analysis, while the restoring forces of...

This paper presents some excellent numerical results of collapse analysis on an RC-steel hybrid frame used in a school gymnasium. The analyses are done by the fibered plastic hinge method. The limit bending moment and the limit shear force of the column base of the upper steel frame and the limit overturning moment of the RC base are checked in the...

The beam element for three-dimensional pure steel frames proposed by the first author is extended for steelconcrete composite members. The authors call this approach the "fibered plastic hinge method". The stress-strain relation of a concrete fiber is modeled as an elastic-perfectly plastic type in this study. Comparisons with the authors' experime...

Elastoplastic buckling behaviors of unequal-legged angle, which is a typical doubly asymmetric section member, under two different loading conditions are investigated by experiments and numerical analysis. The numerical model is of the plastic hinge type. The formulation procedure of the element stiffness matrix is a combination of the 'modified in...

The beam element for three-dimensional pure steel frames proposed by the first author is developed for steel-concrete composite members. The element is of the plastic hinge type. The formulation procedure is a combination of the "modified incremental stiffness method", the updated Lagrangian formulation, and numerical integration of fiber stiffness...

Elastoplastic behaviors of unequal-legged angle, which is a typical doubly asymmetric section member, under some different boundary and loading conditions are investigated by experiments and numerical analyses. The numerical analyses are done by using a new straight beam element proposed by the first author. Comparisons of the numerical results wit...

The accuracy of a new beam element proposed by the first author in combined inelastic bending and nonuniform torsion problem is examined through the collapse analysis of one-bay one-story three-dimensional steel frame with H-columns subjected to eccentric horizontal cyclic loading under a constant vertical load. The element is of the plastic hinge...

The adequacy of the fibered plastic hinge model proposed by the authors for the three-dimensional collapse analysis of steel frames with H-columns under strong vertical loads is examined. Also a procedure is presented for evaluation of the strain of the member caused by three-dimensional elastoplastic deformation of a steel frame. The procedure rea...

The accuracy of a new straight beam element proposed by the author for the combined inelastic bending and nonuniform torsion problem is examined. A plastic hinge type formulation is employed combining the 'modified incremental stiffness method', the updated Lagrangian formulation and numerical integration about the end sections of the element. The...

The accuracy of a new straight beam element proposed by the author is examined for the analysis of elastoplastic cycric behavior of concrete filled tubular (CFT) columns. A plastic hinge type formulation is employed combining the 'modified incremental stiffness method', the updated Lagrangian formulation and numerical integration about the end sect...