Experimental investigation of the after fire mechanical properties of both fibre and lightweight concrete Khalil Arab Shahrab, Aboozar Mirzakhani, Ehsan Kashi Australian Journal of Structural Engineering, 2025 Concrete stands as a fundamental material in the construction industry. However, it encounters challenges such as cracking, crumbling, or disintegration at elevated temperatures, attributed to high thermal stresses and low tensile strength. This study addresses these issues by reinforcing concrete samples with steel and polypropylene fibres, exposing them to temperatures ranging from 25 to 800°C, and conducting mechanical tests. In order to provide a comprehensive examination, a concrete mixture containing lightweight aggregate was also prepared and tested along with other mixtures. The test results showed that adding steel and polypropylene fibres enhanced or maintained compressive strength up to 200°C compared to the control sample. Furthermore, samples containing steel fibres exhibited the highest tensile strength across all temperatures. Notably, at 600°C and above, the lightweight concrete sample demonstrated comparable or superior compressive strength as well as tensile strength compared to the control sample. In addition, it was observed that polypropylene fibres began to melt at 400°C, leading to a decline in compressive and tensile strength in samples containing this fibre type at temperatures exceeding 400°C.
Pedestrian level of service simulating and redesigning sidewalk in crowded urban areas Hamed Kashian, Ehsan Kashi Proceedings of the Institution of Civil Engineers Municipal Engineer, 2022 The design of sidewalks in crowded areas is of great importance in cities. These spaces are sensitive if they happen to be in a central business district (CBD). In this research study, the main objective is to analyse and design the sidewalk adjacent to the bazaar in Semnan, Iran, in a CBD, positioned in a historical location of the city. After surveying number of pedestrian sidewalks during peak hours in the morning and evening, the above-mentioned street was divided into eight parts, and the highest traffic flow was considered as a criterion for the design. Then, based on HCM2016, the density and the level of service (LOS) of each part were obtained. The findings indicated that part 4 had LOS E and density 11 < 11, 52 < 18, part 6 had LOS E and density 11 < 12, 06 < 18 and part 7 with the highest traffic volume of about 2500 people and LOS E was prioritised to increase LOS. The data obtained for each part were studied by PathFinder software and compared with the obtained manual information. Therefore, the road-diet theory was implemented. By increasing the width of the sidewalk by about 3–5 ft/section, there was a resulting improvement in LOS.
Pedestrian simulation and PLOS analysis in the subway station Edris Soltani, Ehsan Kashi Innovative Infrastructure Solutions, 2022 Today, pedestrian traffic is highly regarded because every moving in any way will include walking partly, so improving the pedestrian walkways service level is considered very important. In this research, the service level of walkways and corridors of Sadeghiyeh urban train station in Tehran was examined by using two software, Aimsun and Path Finder. The pedestrian traffic volumes within the scope of the study are gathered through subway organization statistics as well as manual census in the study area. After simulating pedestrian traffic in the two above-mentioned software, the results, including traffic time, pedestrian density, speed, volume, level of service, etc., have been analyzed and the data of these two software are compared with each other. The simulation results also showed that some sections such as corridors, waiting platforms and ticket gates were not predicted based on the pedestrian volume in design year. Therefore, the need to reconsider these spaces is seen based on qualitative criteria for pedestrian (passengers). Final results show that the main hall level of service in the station is between D and E, the North Entrance level of service in station is C and the South Corridor LOS in the station between C and D.
Simulating pedestrian in public places and provide a solution to improve the LOS Mehri Shahriari, Davood Feiz, Azim Zarei, Ehsan Kashi Innovative Infrastructure Solutions, 2022 Store traffic and customer traffic flow are one of the factors affecting the store performance. By recognizing customers’ movement patterns within the store, companies can design interior layouts for the store, which can increase buyers' traffic, average transaction value, and profitability. In this study, the capacity of sections (stairs, special sales area, and checkout) was examined from a hypermarket in Iran. The data were collected through the store’s closed-circuit television films, and then, simulation was performed using the Pathfinder software, and the level of service each department was achieved. Based on the results of the research, the level of service of the store’s stairway was obtained C, which shows the level of service is a desirable stairway service. The level of service in the special sales and checkout area was achieved E, which according to the number of people per square meter, indicates the level of service undesirable for these sectors. Finally, based on results, solutions are provided to improve the quality level of service.
Finite element analysis of ports pavement under container loading Sajad Hasheminasab, Ehsan Kashi Journal of Engineering Design and Technology, 2021 Purpose In many coastal areas where there are problematic soils, pavement construction on the soil is difficult because of the low shear strength and high consolidated. Also, given that the container terminals constitute more than 70% of the port area and as pavement in these areas is subject to heavy loads due to the long-term container storage, wheels of transport and movement equipment, the pavement must tolerate a distributed loading of at least 4 ton/m2 in accordance with the type and weight of the containers imposed on the pavement. This study aims to investigate a variety of common pavement designs in coastal areas of southern Iran. The pavement type and characteristics of the subgrade layers are the same for each port; the thickness of different pavement layers is designed. Design/methodology/approach Due to problematic soil in the pavement subgrade, heavy and long-term container loading and the associated equipment, port pavement enjoys great importance. Findings The designed pavements are modeled by ABAQUS finite element software. The pavements are subject to a static load imposed by the corner casting container and resulted a distributed load 4 tons/m2. The results from data analysis show that the concrete block pavements influenced by the containers static loads of 3%–20% have less vertical displacement on the subgrade than other pavements (rigid and flexible). Originality/value This paper is modeling 3 port pavement in Iran. Based on field evaluation and simulation actual loading on pavement.
The Meta-Analysis of Neuro-Marketing Studies: Past, Present and Future Mehri Shahriari, Davood Feiz, Azim Zarei, Ehsan Kashi Neuroethics, 2020 One of the new topics that has attracted the attention of researchers in recent years is neuro-marketing. The purpose of the present study is to achieve an insight into the progress of studies on neuro-marketing through review of scientific articles in this field with methodology text-mining. A total of 394 articles were selected between 2005 and 2017 using the search for “neuro-marketing” in valid databases. By reviewing the title, abstract, and keywords at various stages of screening, the researchers selected 311 articles related to the neuro-marketing topic in order to carry out the text mining process. Then, pre-processing of data was performed and using cluster analysis, 6 optimal clusters were obtained according to Davis Bouldin index. Using the multi-attribute decision-making technique (SAW), the most important roots were ranked in each cluster. The results showed that interest in research on neuro-marketing has increased in recent years and clusters created around topics such as marketing strategies, advertising and video ads, ethical issues, advertising message components, neuroscience in marketing, economics and consumer behavior, and decision making and brand selection. The study shows that the researchers’ attention is moving from the concepts and principles of the use of neuroscience in marketing, economics and consumer behavior to design and develop marketing strategies using neuroscience.
Urban footpath analysis and simulation - A case study in Sari - Iran Milad Rahmati, Ehsan Kashi Proceedings of the Institution of Civil Engineers Municipal Engineer, 2019 Urban footpath quality and pedestrian level of service is a popular subject for modelling and simulation in transport engineering. This paper reports an investigation into the capacity of footpaths...
Effect of polypropylene fibers and recycled glass on AC mixtures mechanical properties Mohamad Javani, Ehsan Kashi, Siros Mohamadi International Journal of Pavement Research and Technology, 2019 Use of additive material in manufacturing asphalt mixtures has increased recently and, in some cases, it caused an improvement in the stability features of asphalt mixtures. Using waste material in manufacturing asphalt pavements not only prevents wasting national sources but also brings about positive environmental effects. In current research, functional features of hot mix asphalt of Semnan Asphalt Planet which contained w aste recycled glass and polypropylene are analyzed. Meeting the already-mentioned purpose, Marshall stability and flow test, indirect tensile test and dynamic creep test were used to analyze Asphalt Concrete AC mechanical properties. The most significant results show that using 0.2, 0.4, and 0.6 of fibers cause an increase in Marshall stability as 10, 7 and almost 1 percent and using recycled glass caused an improvement in Marshall stability to an amount of 2, 7.5 and 12 percent in comparison with the mix respectively. Besides, upon an increase in the quantity of recycled glass to 6%, the proportion of permanent deformations of asphalt samples decreases.
Presenting the model of inter-region freight transportation in Iran road transportation network Life Science Journal, 2012
A numerical study effect of aircraft's main gear configuration on airport runway damages Technics Technologies Education Management, 2012
Railway network vulnerability from natural disasters and necessity of their management system implementation (a case study: I.R.Iran) Electronic Journal of Geotechnical Engineering, 2012
