Showing 3 results for Rezaei
Mohammad Rezaei, Ebrahim Khalilzadeh Vahidi,
Volume 1, Issue 2 (12-2017)
Abstract
Self-sensing concrete (ISSC) refers to a structural material that can be monitored without the need for a sensor or remote control. By measuring the electrical resistance of the ISSC, stress, strain, cracks and damage can be monitored in situ. Compared to conventional structural materials that require additional sensors for monitoring or tracking, ISSC has the advantage of: high sensitivity, good mechanical properties, natural compatibility, durability, easy installation and maintenance. The ISSC can be used to monitor structural health, tracking traffic and border and military security. In this paper, we describe the ISSC research advances in terms of its composition, construction methods, sensory signal testing methods, sensory properties, and manufacturing mechanism and structural applications. future challenges in the development and application of ISSCs will also be discussed.
Sina Rezaei, Saman Fathi Koche Tala, Ali Naseri,
Volume 2, Issue 1 (6-2018)
Abstract
In a general category, it is possible to divide the various irregular types of structures in height into two irregular geographic and nonlinear groups. In a geometric disorientation at elevation, the dimensions of the structure plan are significant at significant altitudes. In non-horizontal non-uniformity in height, sudden changes occur in the dynamic properties of the structure, including mass, stiffness and lateral resistance of the structure at height. Progressive breakdowns usually lead to a partial collapse of the entire structure, extending a primary damage within the structure, which is like a chain reaction. Studies on structural system failures In recent years, the importance of the phenomenon-failure phenomenon due to abnormal loading due to sudden damage, earthquake, explosion, earthquake, and so on. In this study, four steel structures with a dual-side duct frame, a special bending frame and specially designed 5, 10, 15, and 20 Story collimator brackets were designed in Etabs 2016 software. Then, using the US Department of Comprehensive Maintenance Manual and the method selection The alternative load transfer route, the well-known structures in OpenSEES software is modeled 3D and uses neonotope dynamic analysis to investigate the irregularities of the damping of the perpendicular system on the structural behavior of the seismic behavior in the progressive failure. After analyzing the results of the analysis, it was observed that the irregularity of the cutoff of the lateral load system reduced the structure and stability of the structure and reduced the structural strength against progressive failure.
Mehdi Atayi, Fereydoon Rezaei,
Volume 2, Issue 2 (9-2018)
Abstract
In an analysis of the seismic behavior of a structure, an excitation applied from the ground to the structure for the case where the structure relies heavily on the earth, it is the same stimulus that existed before the construction of the structure at that point of the earth, However, if the structure depends on the soft soil, significant changes will occur in the seismic input of the structure . Therefore, the structure with the surrounding soil will be in operation and will make changes in the base movements Consequently, taking into account the effects of interaction between the soil and structure can accurately increase the natural periodicity and thus reduce the coefficient of earthquake in design and consequently reduce costs. In this study, the resonant coefficients of displacement of fifteen flexural concrete frame with shear wall were resilient and non-reactive analysis. The studied frames are varied in the number of 5, 10, 15, 20, and 25 in 5 openings And the effect of the soil-structure interaction on the magnitude of the displacement coefficient and its comparison with the stationary foot state has been investigated. Each frame was modeled using nonlinear static analysis using the SAP2000 software . The Springer Wincher method has been used for substructure soil model. The results show that the magnitude of displacement coefficient in states with regard to the interaction of soil and structure is higher, regardless of the interaction of soil and structure.
