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- Transactions of the Institute of Japanese Architects
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- Transactions of the Architectural Institute of Japan
- Transactions of the Architectural Institute of Japan Summaries of Technical Papers
- Journal of Architecture, Planning and Environmental Engineering (Transactions of AIJ)
- Journal of Structural and Construction Engineering (Transactions of AIJ)
Volume 80, Issue 712
Displaying 1-13 of 13 articles from this issue
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Baeho JEON, Ippei MARUYAMA2015 Volume 80 Issue 712 Pages 841-850
Published: 2015
Released on J-STAGE: July 11, 2015
JOURNAL FREE ACCESSIn the present study, the hydration reaction in the early age for blast furnace slag cement (BB) and the cement paste of BB mixed with a lime-based expansive admixture was investigated based on different temperature histories. The relation of interdependence between alite and belite was slightly different depending on the existence of expansive admixture, and it was confirmed that the initial hydration reaction rate of the belite mixed in expansive admixture was high. Reaction rates of blast furnace slag(BFS) and alite have high correlation regardless of the curing temperature and the temperature history. Moreover, the possibility of the dependency between the reaction rates of BFS and alite was implied since the dissolution and precipitation equilibrium in the liquid phase. From the high correlation between the downward trend of the Ca/Si ratio and the reaction rate of slag, it was deduced found that the BFS as a source of SiO2 of C-S-H was functioning.View full abstractDownload PDF (1385K) -
Akihiro KUSAKA, Hajime OKANO, Masayoshi NAKASHIMA2015 Volume 80 Issue 712 Pages 851-860
Published: 2015
Released on J-STAGE: July 11, 2015
JOURNAL FREE ACCESSThis paper is an extension of the previous work that proposed formulation for applying Bayesian updating for post-earthquake inspection of steel frames in which beam-to-column connections are potentially fractured. A new model is proposed so that it can take into consideration the correlation of errors in estimating the safety margin. Its feature is summarized as: (1) beam-to-column connections are configured into some groups, (2) the average error is divided into that related to the entire building and that peculiar to each group, and (3) Bayesian updating is applied only for that with the whole building and that with the group to which the inspected beam-to-column connection belongs. In addition of the formulation, illustrative examples show that by applying the proposed model, priority of connection in the inspection order can alter as the results of prior inspection and that the same conclusion on the probability of occurrence of hidden failure can be lead with a fewer number of inspection locations.View full abstractDownload PDF (734K) -
Kensaku KANEKO, Shojiro MOTOYUI2015 Volume 80 Issue 712 Pages 861-871
Published: 2015
Released on J-STAGE: July 11, 2015
JOURNAL FREE ACCESSThis paper discusses dynamic characteristics of large area ceiling subjected to non-uniformly distributed acceleration due to floor or roof in-plane flexibility in steel structures. Horizontal displacement in the ceiling is separated into static and dynamic components based on multi input problem. It is shown that the ratio of horizontal stiffness of the ceiling to in-plane shear stiffness in the ceiling board governs seismic behavior. Two types of the ceiling brace force corresponding to the static and dynamic displacement is analyzed and its practical evaluation method is proposed. Finally, the method is validated in comparison with finite element analysis.View full abstractDownload PDF (1152K) -
Masashi KIMURA, Haruyuki KITAMURA, Toshiaki SATO, Yuichi KIMURA, Hides ...2015 Volume 80 Issue 712 Pages 873-883
Published: 2015
Released on J-STAGE: July 11, 2015
JOURNAL FREE ACCESSThis paper examines relationship between Tokai-Tonankai-Nankai multi-segment earthquake and the earthquakes constituting it in the responses spectra and the energy spectra. Based on these relationships in the spectra, this paper proposes a seismic response evaluation method for maximum response and cumulative damage to Tokai-Tonankai-Nankai multi-segment earthquake of high-rise building. The maximum response is estimated by increasing the single ground motion to the level of the multi-segment earthquake before seismic response analysis. The cumulative damage is estimated by using energy balance. The proposed evaluation method is validated by comparing its results with those of seismic response analysis.View full abstractDownload PDF (2020K) -
Haruyuki YAMAMOTO, He HUANG2015 Volume 80 Issue 712 Pages 885-893
Published: 2015
Released on J-STAGE: July 11, 2015
JOURNAL FREE ACCESSThe piled-raft foundation has proved to be one of economical foundation. Simplified equations for estimating the behavior of piled-raft foundation were proposed by Randolph, and have been used in the primary design. These equations were estimated on the basis of the elasticity theory with respect to the application of the elastic range and many studies have been proved already. However, ground shows nonlinear behavior even if the external load is small. In this study, applicability of these equations was discussed by considering nonlinear behavior of ground by 3-dimensional finite element analyses.View full abstractDownload PDF (1190K) -
Seiji TAKANASHI, Katsutoshi OHDO, Hiroki TAKAHASHI, Yoshio SAKAMAKI, N ...2015 Volume 80 Issue 712 Pages 895-904
Published: 2015
Released on J-STAGE: July 11, 2015
JOURNAL FREE ACCESSThe purpose of this study is to clarify the relationship between the damage of exterior walls and the residual strength of a wooden house after earthquakes. The two kinds of exterior wall were selected in the experiments, one was consist of a siding and another was made by a mortar. In the siding exterior wall, the nails fixing the siding board come out of after loading. In the mortar exterior wall, the width of the crack around the window expanded with loading. As a result, the residual strength of the house after earthquakes could be presumed from the damage of the exterior wall.View full abstractDownload PDF (2455K) -
Yoshihiro KIMURA, Sachi FURUKAWA, Katsunori KANEDA, Toru WATANABE, Aki ...2015 Volume 80 Issue 712 Pages 905-915
Published: 2015
Released on J-STAGE: July 11, 2015
JOURNAL FREE ACCESSOur previous papers proposed a pin column support system on 1st story, which consist of the reinforced concrete downside column and the steel topside column to keep column elastic against base shear force issued by the huge seismic force. The joint consists of an anchor bolt, a cover plate on the RC column and a shear plates into RC column. In this paper, the vertical loading tests are performed to clarify the transmission system of axial force for the joints between the reinforced concrete downside column and the steel topside column. Finally, the yielding strength and ultimate strength are estimated by the closed form solution of the experimental results.View full abstractDownload PDF (1533K) -
Hitoshi KUWAMURA, Yoshiharu SATO2015 Volume 80 Issue 712 Pages 917-925
Published: 2015
Released on J-STAGE: July 11, 2015
JOURNAL FREE ACCESSDirectly connecting beams to a CHS (circular hollow section) column without diaphragms in a moment-resisting frame, the CHS is partially thickened at the connection to prevent local failure and excessive out-of-plane deformation. In such a case, marginal length of the thickened wall beyond the outer surface of the beam flange is crucial to the strength and stiffness of the connection, which was experimentally and numerically investigated in this study. Increasing the marginal length of the thicker CHS accommodating flange plates, outer of which is butt-jointed to a thinner CHS, strength and stiffness obviously increase and approach to those for sufficiently large margin. The rate of convergence of the strength and stiffness with increasing margin is presented in a simple formula for design practice.View full abstractDownload PDF (920K) -
Mao LIU, Masae KIDO2015 Volume 80 Issue 712 Pages 927-937
Published: 2015
Released on J-STAGE: July 11, 2015
JOURNAL FREE ACCESSThis paper is concerned with the effect of the bracing stiffness on the elastic buckling strength of H-shaped members that are subjected to axial force, end moments and uniformly distributed load. The member is simply supported at both ends and discrete or continuous lateral bracing and torsional bracing are attached. The buckling equation is derived by using the Rayleigh-Ritz method. The relation between elastic buckling strength and bracing stiffness are presented when the member is subjected to axial force and end moments when the bracing is attached at the midspan of the member. The relation between the compressive force and the required bracing stiffness in order that the deflection and the torsional angle at the bracing point are zero and the equation to obtain the required bracing stiffness is presented.View full abstractDownload PDF (2179K) -
Kazushi SADASUE, Koichi MINAMI2015 Volume 80 Issue 712 Pages 939-949
Published: 2015
Released on J-STAGE: July 11, 2015
JOURNAL FREE ACCESSWe confirmed the mechanical behavior of exposed type column bases in steel concrete composite columns through the structural tests. The experimental parameters were as follows, axial load level and method of connecting the column of steel concrete member to the footing beam of reinforced concrete member. Total nine specimens were tested, and the ultimate failure mode of eight specimens excluding one specimen under the high axial load failed in flexure at the column base. The structural tests make it clear that the hysteresis curve changes greatly depending on the kind of the connecting bar at column base, and ultimate flexural strength can be evaluated to super posed strength method, in which the ultimate flexural strength of the section of anchor-bolts, reinforcements and concrete below the baseplate. Moreover, proposed evaluation method of restoring force characteristics matches the test result well.View full abstractDownload PDF (1884K) -
Takamasa YAMAMOTO, Jun KAWAGUCHI, Kazuo YAMADA2015 Volume 80 Issue 712 Pages 951-959
Published: 2015
Released on J-STAGE: July 11, 2015
JOURNAL FREE ACCESSThe authors estimated the deteriorated compressive strength of concrete filled square steel tube (square CFT) short columns after the maximum strength attained, which is defined as the stabilized compressive strength (Nstab). Next, the stabilized bending moment (Mstab) of square CFT columns were calculated by use of Nstab. Compression tests of high strength square CFT short columns using steel-fibered concrete (FR-CFT) were also carried out, in order to improve the compressive ductility. As results, the following has been found: i) Nstab decreases as the yield stress increases. ii) calculated Mstab shows good agreement with the experimental results. iii) axial compressive ductility of square FR-CFT short column is higher than square CFT with concrete without steel fibered.View full abstractDownload PDF (618K) -
Shuhei ANDO, Takeo HIRASHIMA2015 Volume 80 Issue 712 Pages 961-970
Published: 2015
Released on J-STAGE: July 11, 2015
JOURNAL FREE ACCESSIn the fire safety design of steel structures, failure of friction type high strength bolted joints is concerned. This paper discusses maximum tensile resistance of friction type high strength bolted joints exposed to fire on the basis of two tensile tests (steady state tests and transient state tests) of the joint. High temperature transient state tests under constant load and increase temperature were conducted in order to investigate the influence of displacement rate on their maximum strength. In case of the transient state tests, the specimen was subjected to the load which was maximum load from the steady state test or from calculation result based on AIJ Recommendation. Load bearing capacity of the joints has been kept over expected critical temperature in case of the transient state tests.View full abstractDownload PDF (876K) -
Fuminobu OZAKI, Taishi HASE, Mamoru KOHNO, Yasuhiro MORI, Jun-ichi SUZ ...2015 Volume 80 Issue 712 Pages 971-979
Published: 2015
Released on J-STAGE: July 11, 2015
JOURNAL FREE ACCESSIn case when fire resistance of a building is verified by using performance-based fire resistant design, it is important to consider influence on inevitable variations and uncertainly including it. Monte Carlo analyses incorporating the variations of steel strength at elevated temperature are conducted in this paper. The collapse temperatures of simple support beams for JIS SN400 and SN490 steel grades are calculated by using the simple plastic theory. By minute investigations on the parametric calculation results, it is clarified that the standard deviation of the collapse temperature depends the variations of the steel strength and gradients of strength degradation curves at the elevated temperature. To quantify a relationship between the standard deviation of the collapse temperature and the variation coefficient of the steel strength, the equation(16) was proposed.View full abstractDownload PDF (925K)
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