2024-03-29T19:09:51Z
https://www.arce.ir/?_action=export&rf=summon&issue=11145
Advance Researches in Civil Engineering
Advance Researches in Civil Engineering
2019
1
2
Experimental Study of Using Organic Waste Ash (OWA) Instead of Cement in Concrete
Abdollah
Mortezaei
Seyyed Vahid
Razavi Tosee
In 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.
Concrete
OWA
Mechanical Strength
cement
2019
04
01
1
7
https://www.arce.ir/article_85696_5b2d30831fe5f716b2beab1714afa8f2.pdf
Advance Researches in Civil Engineering
Advance Researches in Civil Engineering
2019
1
2
Development of Dynamic Simple Shear Apparatus for Small Strain Dynamic Tests on Unsaturated Granular Soils by Bender Element and Ultrasonic Sensors
Ali Akbar
Karimzadeh
Fardin
Jafarzadeh
Adel
Ahmadinezhad
Shear 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.
Dynamic Simple Shear Apparatus
Bender Element
ultrasonic
Unsaturated soils
maximum shear modulus
2019
04
01
8
15
https://www.arce.ir/article_85697_44a881dd78b83222fff98077e8801fea.pdf
Advance Researches in Civil Engineering
Advance Researches in Civil Engineering
2019
1
2
Numerical Investigation on Toggled Actuator Forces in Active Vibration Control System
Seyyed Farhad
Mirfakhraei
Gholamreza
Andalib
Ricky
Chan
In 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.
Active control system
Control forces
Structural active vibration control
2019
04
01
16
35
https://www.arce.ir/article_85699_7dbd8966ff08fbbeafe35b2b69e455ec.pdf
Advance Researches in Civil Engineering
Advance Researches in Civil Engineering
2019
1
2
An Experimental Investigation of a Full-Scale Reinforced Lightweight Aggregate Embankment
Fariborz
Mohammadi Tehrani
Farhad
Tizhoosh
Seyyed Mahdi
Mousavi
Ali
Kavand
This 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.
embankment
Mechanically Stabilized Walls
Lightweight Expanded Clay Aggregates
Geotextile
2019
04
01
36
41
https://www.arce.ir/article_85700_90818e019391ea8266a87b38e4ee1b03.pdf
Advance Researches in Civil Engineering
Advance Researches in Civil Engineering
2019
1
2
Evaluation of Collapsibility Potential in Soil Layers Based on Practical Methods (Case study: Hir City-Ardabil Province)
Mahnam
Roohi Hir
Michael
Yousefadeh
Rouzbeh
Dabiri
Collapsible 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.
Soil collapsibility
Quantitative methods
Qualitative methods
Hir city
Ardebil
2019
04
01
42
49
https://www.arce.ir/article_85701_c8f15688b1c7295d016107f258f36189.pdf