巻号一覧
78 巻, 689 号
選択された号の論文の18件中1～18を表示しています
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閑田 徹志, 百瀬 晴基, 吉田 知洋, 淺岡 茂2013 年 78 巻 689 号 p. 1195-1202
発行日: 2013/07/31
公開日: 2013/09/05
ジャーナル フリーThis study aimed at developing quality controlling technology for securing concrete cover thickness in construction process. Toward this goal, field investigation for cover thickness measuring was conducted and obtained data were subjected to statistical analysis. Field study results showed smaller failure probability against required cover thickness is smaller than in literature. This appears partially due to high accuracy cover thickness measuring scheme adopting nondestructive electromagnetic testing apparatus, where data correction with steel arraignments on site. Furthermore, cover thickness data comparison before and after concrete placing process revealed that cover thickness tend to be larger after concrete placing process than before the process. This phenomenon can lead to proposing effective quality controlling action such that cover thickness is enlarged than required cover thickness before concrete placing to secure required cover thickness with high reliability.抄録全体を表示PDF形式でダウンロード (1585K) -
－天井落下事故を生じた材料の分析－丸山 一平, 五十嵐 豪, 西岡 由紀子, 谷川 恭雄2013 年 78 巻 689 号 p. 1203-1208
発行日: 2013/07/31
公開日: 2013/09/05
ジャーナル フリーAging of calcium silicate board is discussed in the present contribution. Recently, the fall of sealing which is composed of calcium silicate board has been reported at times. The mechanism of aging phenomena of calcium silicate board is not wholly understood. For this reason, the chemical analysis and physical property experiment on the aged and newly provided material are conducted and comparison of those results is made. It is experimentally confirmed that tobermorite in calcium silicate board can be carbonated and resultantly it causes decreasing of density, increasing of water vapor BET surface area and water penetration rate, and decrease in strength. The weight of calcium silicate board per strength can be dropped as it is about 12.5% of original value. It is expected that relatively high water content enhances carbonation rate because carbon dioxides dissolves in it and makes carbonic acid. Therefore, it is strongly recommended that calcium silicate board is only used in the drying condition.抄録全体を表示PDF形式でダウンロード (1311K) -
小舞土壁に用いる壁土に関する研究 その2山田 宮土理, 輿石 直幸2013 年 78 巻 689 号 p. 1209-1218
発行日: 2013/07/31
公開日: 2013/09/05
ジャーナル フリーThe use of clay walls on bamboo lathing less burdens on the environment, but it is necessary to confirm their properties in order to use this wall construction method more widely in safety. In this paper, these properties are measured, including workability, crack and compression characteristics. Tests result in the followings conclusions. In the case of wall clay for the base coat layer, when fiber content increases, elastic modulus and compressive strength decreases, but the two layers across bamboo lathing become monolithic, and toughness is improving. In the case of the middle coat layer, to keep a high level of compression characteristics require minimum amount of straw to avoid cracking.抄録全体を表示PDF形式でダウンロード (1471K) -
金 容徹, 田村 幸雄2013 年 78 巻 689 号 p. 1219-1226
発行日: 2013/07/31
公開日: 2013/09/05
ジャーナル フリーThe primary purpose of the present work was to understand the characteristics of wind force correlations and quasi-static wind load combinations of a target model in a large group. Fluctuating pressures were integrated over the surfaces, and along-wind force, across-wind force, uplift force, along-wind overturning moment, across-wind overturning moment and torsional moment were obtained and used in the analyses. Firstly, the characteristics of wind force correlations, including the ratio of force coefficients, phase-plane expression and cross-correlation coefficients, were investigated for an isolated model and for a target model in a large group. Then, peak normal stresses in columns of a simple frame model were examined to check the wind load combination effects. Lastly, a shielding factor of a combination factor was proposed in the form of an exponential function.抄録全体を表示PDF形式でダウンロード (1477K) -
佐藤 智美2013 年 78 巻 689 号 p. 1227-1236
発行日: 2013/07/31
公開日: 2013/09/05
ジャーナル フリーWe estimate short-period spectral level A, fmax, and Q-value for path of outerrise, intraslab and intetplate earthquakes in the Tohoku district using spectral inversion methods. Q-value of outersise eathquakes is remarkably high in the high frequency range. A of outerise earthquakes are consistent with A of previous reverse-faulting interplate earthquakes. A of normal-faulting earthquakes around the plate boundary are large and comparable with intraslab earthquakes. A of intraslab and outerrise earthquakes are dependent on focal depths. fmax has no dependency on seismic moments nor fault types and the average fmax is 11 Hz. We also develop the attenuation relation of response spectra, peak ground acceleration and peak ground velocity for outerrise earthquakes.抄録全体を表示PDF形式でダウンロード (2590K) -
－システム特性評価とパラメータ設定法－藤井 嵩広, 藤谷 秀雄, 向井 洋一2013 年 78 巻 689 号 p. 1237-1245
発行日: 2013/07/31
公開日: 2013/09/05
ジャーナル フリーThis study elucidates a method to ascertain control variables such as the performance function and weight coefficient, at the initial stage of structural design. For the purpose, authors assess the structural properties (equivalent damping factor and equivalent natural circular frequency) of semi-active optimal control system by MR damper to evaluate the structure response. First, the relations between weight coefficient and those system properties are discussed. Secondly, control parameter determination in consideration in the maximum controlling force is proposed. Validity of those design proposals are investigated by real-time hybrid experiments and numerical simulations.抄録全体を表示PDF形式でダウンロード (1134K) -
野添 順規, 大崎 純, 渡邊 秀和2013 年 78 巻 689 号 p. 1247-1252
発行日: 2013/07/31
公開日: 2013/09/05
ジャーナル フリーAn optimization approach is presented for improving energy dissipation capacity of a shear-type steel damper consisting of a low-yield-point steel panel, which is subjected to cyclic deformation. A general purpose finite element software package is combined with a heuristic optimization algorithm using a script language to carry out elastoplastic analysis iteratively to find optimal solutions. An optimization approach is also presented for identification of material parameters representing mixed nonlinear kinematic-isotropic hardening. It is demonstrated in the numerical examples that the performance of a shear-type hysteretic steel damper can be successfully improved by optimizing the geometry of the panel and the thicknesses of the stiffeners.抄録全体を表示PDF形式でダウンロード (3805K) -
－埋込み杭の拡大根固め部に関する模型実験 その3－石川 一真, 伊藤 淳志, 小椋 仁志2013 年 78 巻 689 号 p. 1253-1261
発行日: 2013/07/31
公開日: 2013/09/05
ジャーナル フリーVertical loading tests were performed on the enlarged grouted base of nodular pile using pressurized sand tank for studying the effects of strength and diameter of enlarged grouted base on the pile bearing capacity. In the tests the failure of the enlarged grouted base tended to be “compression failure” when the strength of the base was low, and tended to be “splitting failure” when the strength of the base was high. When the diameter of the enlarged grouted base was large, the failure tended to be “punching failure” and/or “local compression failure” by the nodes, and the bearing capacity came down when the failure occurred by the upper node. To ensure the bearing capacity of nodular pile with enlarged grouted base, the strength of the base must be heightened in proportion to its diameter.抄録全体を表示PDF形式でダウンロード (5148K) -
秋田 昇道, 中村 尚弘, 工藤 渉, 鈴木 琢也, 木下 拓也, 宮本 裕司2013 年 78 巻 689 号 p. 1263-1272
発行日: 2013/07/31
公開日: 2013/09/05
ジャーナル フリーRecently, 3 dimensional FEM is applied to the earthquake response analysis of the soil-structure interaction system. The more the number of the elements of the interaction system is used, the larger the calculative load becomes. In the previous papers, the time domain energy transmitting boundary for 3 dimensional problem was proposed to improve the efficiency of calculation. In this paper, applicability of the time domain energy transmitting boundary to the 3 dimensional FEM of the nuclear power plant building is analyzed. First, applicability of the time domain energy transmitting boundary to the rigid soil is confirmed by comparison with the viscous boundary. Next, calculative load reduction method is proposed by using the time domain energy transmitting boundary and analyzed the accuracy of the proposed method. Finally, by using the proposed method, applicability of the time domain energy transmitting boundary to 3 dimensional FEM building is analyzed with the effect of the reduction of the calculative load.抄録全体を表示PDF形式でダウンロード (2584K) -
廣石 秀造, 岡田 章, 宮里 直也, 宮城島 丈司, 斎藤 公男2013 年 78 巻 689 号 p. 1273-1279
発行日: 2013/07/31
公開日: 2013/09/05
ジャーナル フリーA number of wooden houses have been destroyed under earthquake. From a structural viewpoint, the authors developed simplified seismic shelter which is consisting of timber grid wall with half-lap joint. The concept of this shelter is saving securing space even if housing is collapsed. Although the stiffness of this shelter is smaller than the conventional grid shear wall for seismic retrofit, this shelter has ability of ductile and energy absorption by embedding at a joint. In this paper, these basic characteristics are verified by experiments and numerical analysis.抄録全体を表示PDF形式でダウンロード (2665K) -
益尾 潔, 田川 浩之, 市岡 有香子, 足立 将人2013 年 78 巻 689 号 p. 1281-1288
発行日: 2013/07/31
公開日: 2013/09/05
ジャーナル フリーIn recent years, composite joints consisting of Steel-Beam and RC-Column or Steel-Beam and SRC-Column are applied to large-scaled moment-resisting frame structures. However, the adequacy of anchorage detail of column reinforcement is not clear due to the lack of experimental data. Also, in accordance with the increase of reinforcement size, mechanical anchorage is more often applied to RC and SRC beam-column joints. In this study, based on experimental data on 9 specimens of L-shaped joint consisting of Steel-Beam and RC-Column or Steel-Beam and SRC-Column utilizing mechanical anchorage, design criteria on ultimate strength of such composite beam-column joints and anchorage length of column reinforcement are discussed.抄録全体を表示PDF形式でダウンロード (1499K) -
（対角加力を受ける単独耐震壁の場合）兼平 雄吉, 小野里 憲一2013 年 78 巻 689 号 p. 1289-1298
発行日: 2013/07/31
公開日: 2013/09/05
ジャーナル フリーThis paper describes analysis accuracy of maximum strength of isolated framed shear walls by limit analysis macro model. This model is established from analysis output by elasto-plasticity analysis macro model. This model is considered based on the lower bound theorem of the limit-analysis theory. This model can apply shear strength of frames. This model guesses maximum strength of experiments with sufficient accuracy, even when shear strength of frames is not applied. Furthermore, if it is applied, accuracy became better. It is shown that these results are effective for evaluation of maximum strength of isolated framed shear walls by this model.抄録全体を表示PDF形式でダウンロード (1644K) -
平石 久廣, 小橋 祐人2013 年 78 巻 689 号 p. 1299-1305
発行日: 2013/07/31
公開日: 2013/09/05
ジャーナル フリーIn this paper, the equations that calculate the seismic response of buildings for moderate earthquakes with considering accurate effect of the soil at the building site are presented. These equations can directly calculate required strength of buildings to satisfy the design spectrum, from design deformation of buildings and can be used for the seismic design of buildings. The validity of this calculation method is confirmed by time-history seismic response analyses. The paper also presents an example of the concept of the design method based on design deformation of buildings which is applied for severe and moderate earthquakes.抄録全体を表示PDF形式でダウンロード (1152K) -
木村 祥裕, 山西 央朗, 笠井 和彦2013 年 78 巻 689 号 p. 1307-1316
発行日: 2013/07/31
公開日: 2013/09/05
ジャーナル フリーIn passive controlled buildings, H-shaped beams connected to steel dampers are subjected to the cyclic axial force in addition to the flexural moment during earthquake, and then the plastic deformation capacity of H shaped beams may decrease because of compressive forces. The direction and magnitude of axial force from dampers changes with the flexural moment, so that the local buckling of the beams under the tensile axial force does not occur. This paper conducts the cyclic axial and shearing forces of H-shaped beams, and investigates the local buckling behavior. The plastic deformation capacity and hysteresis energy of the beams are clarified.抄録全体を表示PDF形式でダウンロード (3046K) -
佐藤 篤司, 鳥山 拓哉, 岡田 久志, 小野 徹郎, 千田 光, 藤内 繁明2013 年 78 巻 689 号 p. 1317-1326
発行日: 2013/07/31
公開日: 2013/09/05
ジャーナル フリーLight gage bearing wall is usually designed as a cantilever column. Therefore, due to over-turning moment from the upper floors, high axial force must be considered at the base. Hold-down components are used to connect the bearing wall to the foundation to resist these high axial forces; it is one of the most important seismic element to guaranty the structural safety.
The purpose of this study is to clarify the connection strength of the hold-down component which is connected by drill screws. Finally, design formula than can evaluate the shear lap joint connected by drill screws was proposed, and the validity of the proposed formula was also demonstrated with the test results.抄録全体を表示PDF形式でダウンロード (3117K) -
－長締め及び短締めボルト併用接合部の荷重-変形関係モデル－福元 敏之, 荻原 行正, 久保田 淳, 東 清三郎2013 年 78 巻 689 号 p. 1327-1334
発行日: 2013/07/31
公開日: 2013/09/05
ジャーナル フリーThis paper proposes a simple model of a load-displacement relation for predicting the local tensile elasto-plastic behavior of moment connections between concrete filled square steel tube columns and steel beams using split-tee connections with both long-through and tensile-type bolts. This model is developed by superposing the load-deformation relations of steel tube, these bolts and split-tees in the connections. The tube flange and split-tee are modeled as beam elements with tetra-linear load-deformation relation, while the tube web and these bolts are modeled as tension members with tetra-linear or tri-linear load-deformation relation. This research verifies the analytical model by comparison with experiment results. The analytical results approximately reproduce the experimental results up to large deformations.抄録全体を表示PDF形式でダウンロード (1903K)
討論
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（吹田啓一郎，田中剛，真鍋義貴，高塚康平著 日本建築学会構造系論文集，第77巻，第682号，1951-1958，2012年12月号掲載）桑村 仁2013 年 78 巻 689 号 p. 1335-1336
発行日: 2013/07/31
公開日: 2013/09/05
ジャーナル フリーThe proposed methods for evaluating the damage associated with crack propagation at beam-to-column welded connections under variable amplitudes in the above paper are discussed about the following items: 1) The proposed equations for crack propagation are not compatible with the proposed equation for the cycles to breakage. 2) Different thresholds of the amplitude causing damage are introduced for different types of loading protocols only for making the predictions agreeable to the experimental results in that any rational reason for altering the threshold is not given.抄録全体を表示PDF形式でダウンロード (1227K) -
吹田 啓一郎, 田中 剛, 真鍋 義貴, 高塚 康平2013 年 78 巻 689 号 p. 1337-1338
発行日: 2013/07/31
公開日: 2013/09/05
ジャーナル フリーThe authors thank Prof. Hitoshi Kuwamura for his discussion, and the answers are as follows; 1) Modified equations for crack propagation are indicated to improve comatibility of the cycle at fracture and to need no threshold of the amplitude. 2) Modified equations are applied to the results of two kinds of varying amplitude cyclic loading tests and validity of the proposed method is verified.抄録全体を表示PDF形式でダウンロード (1487K)
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