{"title":"Investigation on Installation Methods of Cast-in-Place Concrete Piles in Japan From the Late Meiji to Early Showa Periods","authors":"Kazuaki Miyamoto, Fumio Kuwabara, Shuji Tamura","doi":"10.1002/2475-8876.70098","DOIUrl":"https://doi.org/10.1002/2475-8876.70098","url":null,"abstract":"<p>This paper examines the construction methods and applications of cast-in-place concrete piles developed in Europe and the United States and introduced into Japan during the late Meiji to early Showa periods. The first system introduced was the Compressol pile, followed by the Simplex, Raymond, Pedestal, and Franki piles. The Pedestal pile was initially developed in the United States and subsequently further refined in Japan. In addition, the Tanaka-type concrete pile was invented in Japan and applied to numerous buildings. These pile systems have supported many historical structures for more than a century since their introduction.</p>","PeriodicalId":42793,"journal":{"name":"Japan Architectural Review","volume":"9 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2026-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/2475-8876.70098","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148282276","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Modeling of Cyclic Plastic Behavior of SN490B Steel Using Hardening Rule With the Memory Surface Concept","authors":"Yoshiharu Sato, Yu Jiao","doi":"10.1002/2475-8876.70097","DOIUrl":"https://doi.org/10.1002/2475-8876.70097","url":null,"abstract":"<p>In this study, a material constitutive model based on the memory surface concept was proposed to reproduce the cyclic hardening and softening behaviors of SN490B structural steel under constant strain amplitude loading. The model incorporates combined isotropic and kinematic hardening rules, with strain-amplitude-dependent formulations introduced for both. The isotropic hardening rule explicitly accounts for both hardening and softening mechanisms, allowing the model to accurately represent the strain-amplitude-dependent cyclic hardening and softening behaviors of the tested material. Material parameters were calibrated using results from cyclic loading tests conducted at six strain amplitude levels ranging from 0.25% to 12%. With the calibrated parameters, the proposed model successfully reproduces the stress–strain response of the tested material under constant strain amplitude conditions. Furthermore, material tests with variable strain amplitude histories were conducted to examine the applicability limits of the proposed model. The results demonstrate that the model maintains reasonable accuracy for strain histories in which the strain amplitude does not decrease during loading.</p>","PeriodicalId":42793,"journal":{"name":"Japan Architectural Review","volume":"9 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2026-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/2475-8876.70097","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148174419","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Kenji Nishikigi, Yasuhiro Dosho, Phuong Dao Thi, Naoto Kondo
{"title":"Mix Proportion of Fly Ash Concrete Based on the Strength Contribution Ratio","authors":"Kenji Nishikigi, Yasuhiro Dosho, Phuong Dao Thi, Naoto Kondo","doi":"10.1002/2475-8876.70095","DOIUrl":"https://doi.org/10.1002/2475-8876.70095","url":null,"abstract":"<p>This study aims to expand the use of fly ash concrete (FAC). Based on an experimental investigation of <i>k</i> values or the contribution of FA addition to the strength of ordinary Portland cement or Portland blast-furnace slag cement type B, we propose and validate an environmentally friendly mix design for FAC. A method for evaluating the performance of these FA combinations is also proposed. Results show that basing the FAC mix proportion on the <i>k</i> value enables the design of appropriate, environmentally friendly FAC.</p>","PeriodicalId":42793,"journal":{"name":"Japan Architectural Review","volume":"9 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2026-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/2475-8876.70095","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148167071","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Mao Takeyama, Hideki Kikumoto, Yichen Wang, Yasutomo Takakuwa
{"title":"3D3C Velocity Measurement Around a Cubic Building Model in a Wind Tunnel Using a Single-Camera Rainbow PTV Technique","authors":"Mao Takeyama, Hideki Kikumoto, Yichen Wang, Yasutomo Takakuwa","doi":"10.1002/2475-8876.70089","DOIUrl":"https://doi.org/10.1002/2475-8876.70089","url":null,"abstract":"<p>This study applies the rainbow particle tracking velocimetry (rainbow PTV) technique—a single-camera method capable of three-dimensional, three-component (3D3C) velocity measurements—to airflow around a cubic block in a wind-tunnel environment. Helium-filled soap bubbles were used as tracer particles, and volumetric 3D3C velocity information was obtained over a measurement depth of 140 mm, with the cubic building model having a height of 100 mm. A dedicated processing pipeline, including color-to-depth mapping, particle tracking, and depth smoothing, was used to obtain particle trajectories and instantaneous vectors within the measurement volume. The technique successfully captured impingement, lateral divergence, upward motion over the block, and vortex shedding in the wake. Mean velocity fields were compared with reference hot-wire anemometry measurements and showed good agreement in both upstream and wake regions. These results demonstrate that rainbow PTV can provide reliable volumetric velocity measurements in air using a single camera, offering substantially higher spatial coverage than pointwise methods and enabling analysis of unsteady flow phenomena.</p>","PeriodicalId":42793,"journal":{"name":"Japan Architectural Review","volume":"9 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2026-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/2475-8876.70089","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147708074","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}