Yoshihiro Sugimura

Stress changes in adjacent soils of tapered piles during installation into sand

Yoshiro Ishihama, Shinji Taenaka, Yoshihiro Sugimura, Norio ISE

Tapered piles with increasing pile diameter from the pile tip to the top can develop high vertical bearing capacity, especially a high shaft friction owing to tapering and wedging effects. Many researchers have reported these merits over conventional straight piles based on …

A STUDY ON TIMBER PILES AT THE BEGINNING OF SHOWA ERA-Review on sharing ratio of point bearing capacity and skin friction of timber piles-

Yoshihiro Sugimura, Kazuya Mitsuji

The beginning of Showa era was the reconstruction period from the disaster due to Kwanto earthquake occurred on September 1 in 1923, and many geological soil surveys were performed systematically in the eastern part of Tokyo and Yokohama city. Kitazawa2)-5) studied the …

22247 Fundamental characteristics on seismic respone of Pagoda using simple model

Satoshi Odawara, Kazuya Mitsuji, Yoshihiro Sugimura

Reliability of rayleigh wave dispersion curve obtained from f–k spectral analysis of microtremor array measurement

Juan Tokeshi, M. B. Karkee, Yoshihiro Sugimura

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THE AUTHOUR'S ANSWER TO THE DISCUSSION BY PROF. KATSUKI TAKIGUCHI

Tsutomu Hirade, Yoshihiro Sugimura, Fumiya Ohsugi

The authors thank Prof. Katsuki Takiguchi for discussion, and the answers are summarized as follows; 1) The deformation at un-bonded part of stud bars was estimated to be similar to a cantilever beam and shear stress was examined at the fixed end. …

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A MODIFIED BILINEAR HYSTERESIS MODEL AT SMALL STRAINS OF LEAD-RUBBER BEARINGS BASED ON SEISMIC RESPONSE RECORDS

Satoshi Kurita, Manabu Toyoshima, Motojiro MOTOHASHI, Daisuke Chiba et autres

We propose a hysteresis model at small strains of lead-rubber bearing (LRB) by analyzing earthquake records observed in a building with LRBs. The horizontal restoring forces of the base-isolated story are estimated by identifying the vibration system from the records. The skeleton …

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Dynamic Soil-Structure Interaction in Low-Rise Buildings from Seismic Records

Kazuya Mitsuji, M. B. Karkee, Yoshihiro Sugimura

DISCUSSION ON "A METHOD TO CALCULATE SETTELEMENT, STRESS AND ALLOWABLE STRESS OF MULTI-LAYERED GROUND" (PART 2) : Hiroyoshi HIRAI and Takeshi KAMEI, J. Struct., Constr. Eng., AIJ, No.573, 81-88, Nov., 203

Yoshihiro Sugimura

The discusser wants to point out the following item 1) and to ask again the item 2), because the reply of the authors willfully put a false construction on discusser's question and include confusion and disorder between scientific terms and administration terms. …

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SYSTEM IDENTIFICATION OF ROCKING VIBRATION OF A SLENDER SEISMICALLY ISOLATED BUILDING USING EARTHQUAKE RESPONSE RECORDS

Satoshi Kurita, Manabu Toyoshima, Motojiro MOTOHASHI, Yoshihiro Sugimura

Very few observational studies have been performed on rocking motions of slender seismically isolated buildings. The intent of this paper is to clarify the actual rocking mechanism of a slender isolated building by system identification analyses using earthquake response records. A parametric …

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EXPERIMENTAL STUDY ON MECHANICAL PROPERTIES OF PILE HEADJOINT FOR PRESTRESSED HIGH STRENGTH CONCRETE PILES USING UNBONDED STUD BARS

Tsutomu Hirade, Yoshihiro Sugimura, Fumiya Ohsugi

This paper proposes the pile head joint method for prestressed high strength concrete piles using unbonded stud bars and describes the results of bending test and model analysis on the full scale test specimen manufactured by proposed joint method. The obtained conclusions …

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FUNDAMENTAL STUDY ON HALF-PRECASTING AND EVALUATION FOR UNIFORMITY OF FOUNDATION BEAMS WITH JOINTS(Materials and Construction)

K. Sasaki, Yoshihiro Sugimura, Masaaki Tada

In order to construct foundation beams using half precast concrete technique, authors have investigated to confirm the uniformity in the process of execution and the uniformity of structural members as finished products. The square test speciments without joint of the precast concrete …

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DISCUSSION ON "A METHOD TO CALCULATE SETTELEMENT, STRESS AND ALLOWABLE STRESS OF MULTI-LAYERED GROUND"(Hiroshi HIRAI and Takeshi KAMEI, J. Struct., Constr. Eng., AIJ, No. 573, 81-88, Nov., 2003)

Yoshihiro Sugimura

As an important keyward, the authors use "allowable stress of the ground" which can not be found out in any publications of AIJ excepting regulations such as Notification No.l 113. About 30 years ago, there was a hot argument between members of …

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