Papyrus PressAdvance Researches in Civil Engineering2645-72291220190401Experimental Study of Using Organic Waste Ash (OWA) Instead of Cement in Concrete178569610.30469/arce.2019.85696ENAbdollahMortezaeiM.Sc. of Structural Engineering, Jundi-Shapur University of Technology, Dezful, Iran.Seyyed VahidRazavi ToseeAssistant Profesor, Department of Civil Engineering, Jundi-Shapur University of Technology, Dezful, Iran.Journal Article20180712In this experimental study, the mechanical strength properties of concrete using 5, 8 and 12% of organic waste ash (OWA) instead of cement are investigated. The results showed that the 28 days compressive and tensile strength and slump of the concrete made by OWA in compared with ordinary concrete were 0.99, 0.99, and 0.8, respectively, for 5% OWA instead of cement, 0.96, 0.9, and 0.69, respectively, for 8% OWA instead of cement, and 0.9, 0.9, and 0.09, respectively, for 12% OWA instead of cement.https://www.arce.ir/article_85696_4e2bd4730e7cfeae2a16e4570e678e84.pdfPapyrus PressAdvance Researches in Civil Engineering2645-72291220190401Development of Dynamic Simple Shear Apparatus for Small Strain Dynamic Tests on Unsaturated Granular Soils by Bender Element and Ultrasonic Sensors8158569710.30469/arce.2019.85697ENAli AkbarKarimzadehM.Sc. of Geotechnical Engineering, Depaertment of Civil Engineering, Sharif University of Technology, Tehran, Iran.FardinJafarzadehAssociate Profesor, Department of Civil Engineering, Depaertment of Civil Engineering, Sharif University of Technology, Tehran, Iran.AdelAhmadinezhadPh.D. of Geotechnical Engineering, Department of Civil Engineering, Sharif University of Technology, Tehran, Iran.Journal Article20180625Shear modulus and confined modulus are important parameters for static and dynamic analysis in geotechnical applications. Cyclic simple shear apparatus had been developed by mounting bender element and ultrasonic sensors to measure continuous shear wave and pressure wave velocities for determination of Gmax and M. For this purpose two new pedestals have been fabricated on which HAE ceramic disc and sensors were mounted. A pressure control panel and a hanging column system have been designed to apply high and low matric suction values with high accuracy. Finally, some tests was conducted to verify the result of device performance and to compare with the theoretical results of unsaturated soils. https://www.arce.ir/article_85697_8a7b5e8f3bf40c878391605eea315970.pdfPapyrus PressAdvance Researches in Civil Engineering2645-72291220190401Numerical Investigation on Toggled Actuator Forces in Active Vibration Control System16358569910.30469/arce.2019.85699ENSeyyed FarhadMirfakhraeiPh.D. of Structural Engineering, Depaertment of Civil and Infrastructure Engineering,Faculty of Civil Engineering,
University of RMIT, Melbourne, Australia.GholamrezaAndalibDepartment of Water Resources Engineering, Faculty of Civil Engineering, University of Tabriz, Tabriz, IranRickyChanAssociate Professor, Department of Civil and Infrastructure Engineering, Faculty of Civil Engineering,
University of RMIT, Melbourne, Australia.Journal Article20181008In this paper a numerical investigation of installation of actuator in a toggle configuration for decreasing of active control forces in engineering structures has been carried out. During the past two decades, researchers have been focused to prevent the vibration of tall building from strong earthquakes. For achieving this purpose, they applied either massive conventional bracing or passive energy dissipation dampers. Subsequently, they developed active control systems in structures to resist against the high seismic loads. However, this later method eventuates installing massive actuators in building which are not only very costly and uneconomically but also needs large electricity power. In this research, using by known earthquakes, investigation of the effects of the toggle configuration on actuator forces has been performed numerically. For numerical investigation, active tendon control system was selected as a comparison. The numerical investigation shows significant reduction in actuator forces through using toggle configuration. Finally, comparing results through the numerical processe express high matching that relies on mitigation of control forces in the toggled active model.https://www.arce.ir/article_85699_28ae136b6a803eb29edd1cb1cf698c7b.pdfPapyrus PressAdvance Researches in Civil Engineering2645-72291220190401An Experimental Investigation of a Full-Scale Reinforced Lightweight Aggregate Embankment36418570010.30469/arce.2019.85700ENFariborzMohammadi TehraniAssociate Professor, Department of Civil and Geomatics Engineering, California State University, Fresno, U.S.A.FarhadTizhooshLeca CompanySeyyed MahdiMousaviLeca Company.AliKavandAssistant Professor, College of Civil Engineering, University of Tehran, Tehran, Iran.Journal Article20180910This paper presents the result of an experimental investigation on a full-scale reinforced lightweight aggregate embankment. The reinforced body was expanded clay aggregates, reinforced with geotextile facing. Loadings included self-weight, static surcharge applied using concrete slabs on top of the embankment, and dynamic loads simulated by a vibrator on top of the concrete slabs as well as dropping weight impacts. The system was designed using load and resistance factor design. Measured parameters included lateral and vertical deformations, velocity, and acceleration during tests. This paper covers design and construction details of the built embankment. Results indicate viability of using lightweight expanded clay aggregate in the proposed mechanically stabilized earth walls with geotextile facing as a mean for accelerated construction of bridge abutments.https://www.arce.ir/article_85700_135876a1d6b85be7ad12ba9946418357.pdfPapyrus PressAdvance Researches in Civil Engineering2645-72291220190401Evaluation of Collapsibility Potential in Soil Layers Based on Practical Methods (Case study: Hir City-Ardabil Province)42498570110.30469/arce.2019.85701ENMahnamRoohi HirM.Sc. of Geotechnical Engineering, Department of Civil Engineering, Tabriz Branch, Islamic Azad University, Tabriz, Iran.MichaelYousefadehAssistant Professor, Department of Civil Engineering, Tabriz Branch, Islamic Azad University, Tabriz, Iran.RouzbehDabiriAssistant Professor, Department of Civil Engineering, Tabriz Branch, Islamic Azad University, Tabriz, Iran.0000-0002-1807-1945Journal Article20180815Collapsible soils is one of the problematic soil because of complex mechanism collapse in them, the recognizing and analyzing effective parameters on phenomenon is so important. Collapsible soil is non- saturate soil, due to moisten and specifically loading, connection between soil particles become loose and finally suddenly destroying happen in soil layer. In this study, collapsible potential in soil layers of Hir city based on practical methods were evaluated. 16 specimens were collected in study area. Practical methods were divided to qualitative and quantitative criterions. In quantitative procedure, double odeometer test based on ASTM were performed. Results of this study showed that between qualitative methods there is not good agreement. Although, quantitative procedure proposed high risk in terms of collapsibility in soil layer.https://www.arce.ir/article_85701_06f4e0cc96b6a4d29a40580775288ebf.pdf