نشریه مهندسی و مدیریت ساخت
سال هفتم شماره 2 (پیاپی 26، پاییز و زمستان 1401)

In Iran, due to climatic conditions and the need to build a dam to store water, dam construction is of particular importance. The construction of dams, like any other technology, has different positive and negative effects. The purpose of this study is to prioritize the amount and type of environmental effects of dams by Analytic Hierarchy Process (AHP). The present study is applied in terms of purpose and descriptive-survey in terms of data collection. Research data were analyzed using Analytic Hierarchy Process (AHP) and Exoert Choice software. The research collection tool is a researcher-made questionnaire that its validity was confirmed by the opinions of professors, experts and specialists in statistics and its Cronbach's alpha test. The statistical population of this research is all members of the engineering system of Yasuj city, which according to the estimates of the Engineering System Organization is 2000 people. Based on Krejcie and Morgan table, 50 people were selected for the above population as the sample size (due to coronary constraints and the nature of hierarchical analysis). Sampling method is available by sampling. The results showed that the most important factors affecting the environmental effects of different types of dams by hierarchical analysis from the strongest to the weakest factor are: gravel dams, weighted concrete dams, retaining concrete dams, rubber dams, arched concrete dams Weight-based dams, sediment dams, earthen dams.

Sports projects are one of the important projects that play an important role in the cultural, social and health development of the community. Building sports projects, like many other types of projects, has different challenges. Assessing the success of the method of providing this type of projects using Islamic treasury documents and providing corrective solutions in this research has been considered by the researcher. The case study of this research is the company for the development and maintenance of sports venues in the country. success rate and identification of effective factors, it can be considered as an innovation of this research. The statistical sample size of this research is 385 people and the interviewees have been identified using the snowball method. The statistical questionnaire is organized in three sections: general questions, primary market and secondary market. The reliability of the questionnaire based on Cronbach's alpha formula is 0.763. The results show that contractors are not very receptive to Islamic Treasury documents and market fluctuations, inflation and market stagnation affect the performance of these documents. In the primary market of these documents, weakness in the awareness of managers, weakness in the variety of tools and documents of the Islamic treasury are among the problems. There are also obvious problems in the secondary market, such as the lack of full receipt of receivables, the discount rate is not commensurate with the tax received from contractors. The main criteria are managerial, contractual, legal and legislative, and upstream measures.

In the current situation of the country, the most important necessity is the use of new construction technologies due to its important role in sustainable development. Higher manufacturing speed than traditional methods has made it possible to prepare more units for operation in less time. The purpose of this research is to study new construction technologies in terms of efficiency in Iran and to select the best method based on FAHP fuzzy hierarchical analysis. The research was applied in terms of purpose and descriptive-survey in terms of data collection, and the research data were analyzed using a hierarchical method. The data collection tool in this field research is a questionnaire. The statistical population of this study was members of the Yasuj Building Engineering System Organization. Random sampling method was used. Morgan's table was used to estimate the sample size, which is equal to 100 people. The results showed that the most important factors in the study of new construction technologies in terms of efficiency in Iran and selecting the best method from the strongest to the weakest, respectively, are the priority of green roof technology, durable frame system, nano building coatings, biological concrete, windows and walls. Thermochromic, cold rolled light steel frame system, two-shell facades, solar panels and trade panels.

The basis and reference for investigating construction violations within the legal framework and approved by cities is Article 100 of the Municipalities Law and its 11 notes. Despite the penalties provided for in Article 100 of the Iranian Municipal Law for such violations, it does not appear to be effective. The purpose of this study was to investigate the factors affecting the prioritization of the most important construction violations in the Article 100 Commission (case study of Yasuj city). This research was a descriptive survey in terms of practical purpose and data collection in terms of data collection and data collection tool in this field research was a questionnaire. The statistical population of this research is the members of Yasuj Building Engineering System Organization. Morgan's table was used to estimate the sample size, which is equal to 100 people. Research data were analyzed using hierarchical method. AHP method was used to analyze the data and test the main research hypothesis. Data were collected using a questionnaire and analyzed by Expert Chice software. The results showed that the most important factors in prioritizing the most important construction violations in the Article 100 Commission (case study of Yasuj city) from the strongest to the weakest factors are: violation of construction against the use of the building (23%), lack of strength ( 21%), non-observance of technical principles (17%), encroachment on urban thoroughfares (14%), violation of unlicensed building (8%), violation of non-construction of parking (7%), violation of building density (6%), engineer violations Observer (4%).

The municipality is a government office under the Ministry of Interior, and in the past, the municipality of Baladieh was said to exist only in Tehran. The purpose of this article is to calculate several files of tolls received per square meter and to separate the tolls of each file in the city. The research method of this article has been done in the field with the help of an interview. In this article, paragraph 4 of issuing tolls from 3 building files from 3 areas of the city with a city such as Meshgin Dasht is compared and discussed, and according to the calculations made in the analysis section for residential houses from 100 meters to 200 meters, the amount is about 20 Up to 60 million Tomans depending on the region, climate, land density and the amount of tolls per meter that you saw in the file, the municipality receives about 200 to 400 thousand Tomans per meter from the subscribers, and as a result, according to studies and inquiries from Respected employees of the municipality, about 40% of the municipal revenues are provided from the construction license of the subscribers. is not..

One of the issues that affects the behavior of the structure during an earthquake is the geometrical shape of the cross section of the structure's columns. In concrete buildings, it is possible to use columns with different shapes, which can be different in terms of behavior and performance. In this research, for the analysis and design of the studied structures, two completely similar concrete buildings, one with columns with a cut surface, are compared and analyzed. circular and the other with a square cross-section under the effect of earthquake force. The results shown in the comparison of stresses and drift in two four-story buildings with circular and square columns have been analyzed by dynamic analysis, and the minimum and maximum drift and the permissible value are specified graphically. In this research, modeling of flexural concrete frame with square and circular columns under earthquake force in Etabse software and applying loads to it and performing dynamic analysis, the results were extracted from the said software and compared. The results of this research showed that the amount The energy loss of circular columns is more than that of square columns. Also, the ductility of circular columns is more than square columns, in general, the performance of circular columns in short buildings is better than square columns.

The purpose of this research is to investigate the impact of construction management on structural stresses in buildings in Yasouj city. The research method is applied in terms of type and descriptive and survey in terms of execution method. Also, this research is exploratory and the library and field method (completing the questionnaire) was used to collect the required information and data. The statistical population of this research consists of all engineers and workers as well as other factors involved in construction projects in Yasouj city, which consists of 1800 people. The number of samples selected in this research is 306 people from the above statistical population. The research results indicate that the fatigue component in metal and concrete structures (r = 0.422 and p = 0.0001), tensile stresses in the building (r = 0.503 and p = 0.0001), compressive stress and thermal in the building (r = 0.471 and p = 0.0001), shear stresses in the building (r = 0.553 and p = 0.0001), have a positive and significant relationship with construction management. Finally, the results also showed that construction management has a positive and significant relationship at the 99% level with structural stresses in the buildings of Yasouj city.

In addition to higher carrying capacity, ballastless railways require lower maintenance costs than ballasted ones. Nevertheless, the rail seat abrasion (RSA) is one of the most important factors of damage to the slab railways. In this study, the effect of RSA on the performance of prestressed concrete slabs has been investigated using finite element method. For this purpose, the loss of prestressing force without considering abrasion, abrasion of 5.12, 25 and 37.5 mm with different values of loss of prestressing force, abrasion of 5.37 mm with different values of compressive strength and different values of abrasion along with the removal of prestressing force in the longitudinal direction in the structure has been checked. The results showed that due to the linear behavior of concrete under the range of loading and the absence of cracks in the structure, changes in prestressing force, removal of prestressing force in the longitudinal direction have minor effect on the mid-span displacement (<2%). However, with increasing the prestressing force drop from 10% to 20%, the displacement is reduced by 50%. In general, it can be found that increased abrasion reduces the capacity of railway. The effect of increasing the abrasion on the maximum mid-span displacement in prestressed concrete slab line is not linear and the higher the amount of abrasion, the greater the amount of displacement increases.

It is now known that the behavior of any structural system during an earthquake is largely determined by its energy dissipation capacity through ductile behavior. And shows the degree of nonlinear behavior of the structure. In this paper, in order to compare the bending frames from the economic point of view and the effect of ductility on the amount of consumable materials, conventional reinforced concrete bending frames with different ductility and with different number of 6 and 12 floors have been selected as representatives and observing all criteria. Aba are designed for each group. After proper typing and observing the executive points and preparing executive plans, the amount of consumable materials (concrete and steel) has been determined and all costs have been estimated according to the existing price list (2009).These costs only include the cost of materials used in the construction of beams, columns and foundations, and the cost of roof and other structural costs are not included because changing the type of ductility has no effect on other costs and only in the design of beams, columns and Foundations are effective.

The aim of the current research is the impact of high-rise urban buildings on the management of infrastructure, wastewater and urban waste with a construction management approach (case example of Yasouj city). The intended research method in this thesis is based on the practical purpose and on the descriptive-analytical nature. The statistical population of this research is made up of all engineers who are members of the supervision of the engineering system of Yasouj city. Cochran's method was used for random sampling in order to select the number of samples. In this research, a designed questionnaire tool (standard questionnaire) was used, which is one of the most common data collection tools in the field method. whose validity and reliability have been confirmed under the supervision of relevant experts and professors. In this research, according to the assumptions of the research and the sample group, SPSS software was used in two levels of descriptive and inferential statistics to analyze the data of the current research. ArcGIS software is used to display data and draw maps. The results of the research indicate that: high-rise construction has an impact on the use of residential land, and due to the increase in the urban population, on the service use of this city, as well as on the use of roads and the urban traffic network of Yasouj city.

The steel plate shear wall (SPSW) as a lateral bearing system in high-rise buildings has been focused in recent decades. Today, these lateral bearing members with high ductility, high energy absorption, and high initial stiffness are used in new buildings as well as rehabilitation of existing buildings, especially in earthquake-prone countries. The use of stiffeners in the SPSW reduces the thickness of the infill plate, and increases the strength and stiffness of the SPSW. The aim of this study is to present a new arrangement for stiffeners with high performance in order to achieve higher shear strength and lateral stiffness. For this purpose, after validating the numerical modeling, several SPSWs with common (horizontal-vertical and diagonal arrangement) and proposed arrangement (diagonally along with horizontal-vertical) of stiffeners were modeled in Abaqus finite element software and were subjected under monotonic and cyclic loads. The results showed that the suggested arrangement provided more confinement for the infill plate and enhanced the final shear strength of the SPSW by 47.5%.

The abstract should state briefly the purpose of the managers and people involved in the project is the success of the project, and on the other hand, success is a general concept, so the purpose of this research is to identify the success indicators of the project. Since the success indicators are different for different projects, and This issue in construction projects has more differences than other industries due to the extent of this industry, so the focus of the current research is only on construction projects. This research is based on the result of an applied research and based on how to obtain the required data, it is considered a survey research. The process of doing the work is as follows, in order to identify the relevant indicators, first by reviewing related domestic and foreign articles and then interviewing experts, the key indicators of the success of construction projects were identified, and then the aforementioned indicators were prioritized through a survey through a questionnaire. became It is worth mentioning that in order to achieve a complete point of view, the statistical population of this research includes 52 experts with sufficient experience who are present in various elements of construction projects (contractors, consultants and employers). According to the results of the survey, 6 key indicators for the success of construction projects were obtained.