Analyzing Parametric Sensitivity on the Cyclic Behavior of Steel Shear Walls

Kolbadi, Seyed Mohamad Seyed; Hassani, Nemat; Kolbadi, S. Mahdi S.; Mirtaheri, Masoud

doi:10.1155/2021/3976793

Cited by 5 publications

(4 citation statements)

References 12 publications

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“…Also, in order to perform physical modeling in the laboratory environment, the necessary equipment for physical modeling of stone columns will be made, and loading will be done by a hydraulic Jack. In fact, the samples will be made in the laboratory and loaded first [13]. In physical modeling in the laboratory, after the construction of the device, circular stone columns with different diameters, in different geometric arrangements and for different percentages of soil density, will be loaded by a hydraulic Jack [14].…”

Section: Methodsmentioning

confidence: 99%

“…In the Mohr model, the Mohr-Coulomb rupture criterion is used as the yield surface, and the law of flow in the shear state is assumed to be independent. In using this model, it should be noted that some basic aspects of soil behavior, such as the dependence of stiffness on the path and the history of stress and strain in it, have been omitted [13]. In order to model sandy soil and improve it by using stone columns with the desired specifications, the capabilities of Abacus finite element software will be used.…”

Section: Numerical Studymentioning

confidence: 99%

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Numerical and Larg‐Scale Laboratory Study of Rock Column Groups in Sandy Soil Behavior Improvement

Samangani

Naderi

2022

Advances in Civil Engineering

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The use of stone columns as one of the effective methods in improving soil behavior can increase soil bearing capacity. One of the common methods in improving poor soil is the use of stone columns. Stone columns are considered one of the suitable options to improve the bearing capacity of loose cohesive and granular soils, which, in addition to reducing soil subsidence, is also considered an effective, economical, and environmentally friendly method in structures built on soil. Considering the financial and human losses caused by the construction of various buildings on poor soils, the importance of developing improvement methods in weak and unsuitable soils is essential. On the other hand, sandy soils are always considered an unsuitable soil sample in design. Therefore, in the present study, we use group stone columns to improve the behavior of a sandy soil sample. When a sample of soft sandy soil is exposed to loading due to its sandiness, we see an increase in soil subsidence and thus a decrease in its load-bearing capacity. In order to obtain practical and useable results in practice, in addition to numerical studies, we conduct a laboratory study to investigate the effect of rock columns on improving sandy soil performance. In sandy soil armed with 4 rock columns, the comparison of the results obtained from the numerical and laboratory model to the displacement of 2 mm is completely consistent with each other, and with increasing displacement, we see a difference between the numerical and laboratory results, so that for a 6 mm displacement, we see an 8% difference in numerical and laboratory results. The final sample capacity in the numerical and laboratory study in this case is 6730 N and 6192 N, respectively.

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Section: Methodsmentioning

confidence: 99%

Section: Numerical Studymentioning

confidence: 99%

Numerical and Larg‐Scale Laboratory Study of Rock Column Groups in Sandy Soil Behavior Improvement

Samangani

Naderi

2022

Advances in Civil Engineering

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“…One of the factors affecting the torsional stiffness of the structure during an earthquake is the equivalent moment of inertia of each floor. In this study, the moment of inertia around the weak axis of each floor is considered as the equivalent moment of inertia of the building and as a measure of lateral and torsional stiffness in the structure in the fuzzy model [14].…”

Section: Modeling Logic and Evaluation Of Effective Parametersmentioning

confidence: 99%

Buildings, Causalities, and Injuries Innovative Fuzzy Damage Model during Earthquakes

Shahmirani

Akbarpour

Ramezani

et al. 2022

Shock and Vibration

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One of the human concerns has always been to estimate the damage caused before the earthquake and predict the extent of injuries and causalities. An effective model should be developed based on the field survey data for appropriate prediction. In this study, the degree of damage to the structure is first determined and the potential damage is then predicted using field data and fuzzy logic (FL). Effective parameters in the model include the structure height, building age, shear wave velocity in the soil, the plan equivalent moment of inertia, distance to the fault, earthquake factor, the number of inhabitants in the building, and the building height-to-width ratio (HWR). The parameters are fuzzily divided into five classifications: bad, relatively bad, medium, relatively good, and good. The model output parameter, which is the degree of damage to the building, is fuzzy and is divided into five classifications: complete damage, extensive damage, moderate damage, slight damage, and no damage. It should be noted that buildings with steel and concrete structures and moment frames, in the night, day, and traffic time scenarios, have very limited type 3 and 4 injuries with 32, 24, and 16 people, respectively, but type 1 and 2 injuries are significant. During the earthquake at night, the number of people with type 1 and 2 injuries is 975607 and 58757, in the event of the earthquake during the day, the number of people with type 1 and 2 injuries is 739096 and 44513, and during the earthquake at traffic time, the number of people with type 1 and 2 injuries is 492731 and 29675, respectively.

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“…In order to be able to form the external shape of the building in such a way that it has a suitable aerodynamic performance, an optimization process should be considered to minimize the aerodynamic responses in this process [9]. In this process, the effect of all aerodynamic modifications can be observed.…”

Section: Introductionmentioning

confidence: 99%

Investigation on the Aerodynamic Parameters of the Triangle Shape of Tall Buildings by Using of CFD Method

Noormohamadian,

Salajegheh

2023

Advances in Civil Engineering

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Wind loading in large buildings has always been a major challenge for civilian engineers. For this purpose, presenting the optimum exterior forms of a building exposed to the wind flow and analyzing aerodynamic forces, including resistance force, bending, and twisting moments, are challenging issues for designers. Nowadays, by combining various numerical calculation methods, like neural networks, genetic algorithms, and other methods, by changing some parameters, they optimize the external form of the building based on aerodynamic parameters. In this research, three optimized triangular models will be investigated using the computational fluid dynamics method. For wind flow, a velocity profile is used in the three simulations, and Reynolds’ Navier–Stokes average equations are used to solve momentum relationships. Additionally, the κ-ε method was used to calculate Reynolds stresses. The results show that the optimized N3 model is in the most optimal condition possible in terms of aerodynamic parameters such as drag, torsion moment, and vortices behind the building. Nowadays, the neural network algorithm is one of the most famous numerical methods for optimizing hull shapes. However, this approach cannot improve aerodynamic parameters either. Hence, computational fluid dynamics is used to deeply analyze. This research is one step forward to assess the optimized hull shapes of tall buildings. All tests are conducted using STAR CCM+.

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Analyzing Parametric Sensitivity on the Cyclic Behavior of Steel Shear Walls

Cited by 5 publications

References 12 publications

Numerical and Larg‐Scale Laboratory Study of Rock Column Groups in Sandy Soil Behavior Improvement

Numerical and Larg‐Scale Laboratory Study of Rock Column Groups in Sandy Soil Behavior Improvement

Buildings, Causalities, and Injuries Innovative Fuzzy Damage Model during Earthquakes

Investigation on the Aerodynamic Parameters of the Triangle Shape of Tall Buildings by Using of CFD Method

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