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Kosaka H.,Sumitomo Mitsui Construction | Mizoguchi M.,Muroran Institute of Technology
Journal of Structural and Construction Engineering | Year: 2014

This paper discusses a strength evaluation method of precast multi-story shear wall system which allows slip failure of the vertical joint between wall panels and boundary columns. Shear force of the vertical joint is transmitted by cotters and the joint reinforcements of beam position. Ultimate strength of the wall system is evaluated by adding strength of a wall panel by the calculation method shown in our previous paper and shear forces of the columns. The results of this method were compared with loading tests of the precast wall systems. The calculated values were in good agreement with the experiments.

Kasuga A.,Sumitomo Mitsui Construction
Structural Concrete | Year: 2011

A unique suspension method developed over a period of more than 10 years produces a rational structure in the form of a single-span composite truss bridge. For this structure, the steel truss and concrete deck are constructed on the spanning cables. During construction the horizontal forces of these cables are anchored into the ground, but after completion of the bridge the forces are transferred to concrete upper and lower chords as prestressing forces. A single-span composite truss bridge of this type can be constructed without temporary supports or falsework. Using this method to bridge a deep valley produces benefits in terms of both construction costs and sustainability. A single-span bridge requires less excavation than other bridge types, and utilizing a composite truss with this construction method can minimize the environmental impact of the construction. Copyright © 2011 Ernst & Sohn Verlag für Architektur und technische Wissenschaften GmbH & Co. KG, Berlin.

Kasuga A.,Sumitomo Mitsui Construction
IABSE Conference, Nara 2015: Elegance in Structures - Report | Year: 2015

As Roman architectures needed three elements, structural elegance of bridges is the combination of three elements of beauty, functional, structural and beauty of form. Besides, past innovations that added ingenuity and creativity to structural elegance can be considered sustainable. A structure becomes sustainable by combining structural elegance with creativity, which we called structural sustainability. What is the relationship between structural elegance and sustainability? This paper considers how to realize more elegant bridges.

Matsumoto T.,Kanazawa University | Nemoto H.,Research Center andrporation | Mikami H.,Sumitomo Mitsui Construction | Yaegashi K.,Hazama | And 2 more authors.
Soils and Foundations | Year: 2010

A series of experimental and analytical studies on the behaviours of model pile groups and model piled rafts in dry sand subjected to static vertical loading and static cyclic horizontal loading were carried out in order to investigate the influence of various pile head connection conditions between the raft and the piles on the behaviours of the foundations models and to examine the applicability of an simplified analytical method to simulate the load tests. In the load tests, the behaviours of the model foundations were investigated in detail, with particular focus on cyclic horizontal loading, and behaviour such as horizontal stiffness and the rotation of the foundation, the load proportions between the raft and the piles, and the bending moments and shear forces generated in the piles. A simplified three-dimensional deformation analysis method was used to simulate the experiments.

Kishi N.,National Institute of Technology, Kushiro College | Mikami H.,Sumitomo Mitsui Construction
ACI Structural Journal | Year: 2012

To establish an impact-resistant design procedure for reinforced concrete (RC) structures based on the performance-based design concept, an evaluation method for the impact-resistant capacity of the structures needs to be developed. Until now, a particular method for beams has not yet been specified worldwide. To achieve this, falling-weight impact tests on a total of 36 beams with varying section parameters were conducted and the key factors for better representing the impact behavior of the beams were investigated. Two empirical equations were derived based on the experimental results. By using these equations, the required static flexural load-carrying capacity of an RC beam may be determined by specifying the limit state with the maximum and residual deflections of the beam. Copyright © 2012, American Concrete Institute. All rights reserved.

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