A novel multi-feature model predictive control framework for seismically excited high-rise buildings

Javad Katebi,Afshin Bahrami Rad,Javad Palizvan Zand 국제구조공학회 2022 Structural Engineering and Mechanics, An Int'l Jou Vol.83 No.4

In this paper, a novel multi-feature model predictive control (MPC) framework with real-time and adaptive performances is proposed for intelligent structural control in which some drawbacks of the algorithm including, complex control rule and non-optimality, are alleviated. Hence, Linear Programming (LP) is utilized to simplify the resulted control rule. Afterward, the Whale Optimization Algorithm (WOA) is applied to the optimal and adaptive tuning of the LP weights independently at each time step. The stochastic control rule is also achieved using Kalman Filter (KF) to handle noisy measurements. The Extreme Learning Machine (ELM) is then adopted to develop a data-driven and real-time control algorithm. The efficiency of the developed algorithm is then demonstrated by numerical simulation of a twenty-story high-rise benchmark building subjected to earthquake excitations. The competency of the proposed method is proven from the aspects of optimality, stochasticity, and adaptivity compared to the KF-based MPC (KMPC) and constrained MPC (CMPC) algorithms in vibration suppression of building structures. The average value for performance indices in the near-field and far-field (El earthquakes demonstrates a reduction up to 38.3% and 32.5% compared with KMPC and CMPC, respectively.

A generalized ANFIS controller for vibration mitigation of uncertain building structure

Javad Palizvan Zanda,Javad Katebi,Saman Yaghmaei-Sabegh 국제구조공학회 2023 Structural Engineering and Mechanics, An Int'l Jou Vol.87 No.3

A novel combinatorial type-2 adaptive neuro-fuzzy inference system (T2-ANFIS) and robust proportional integral derivative (PID) control framework for intelligent vibration mitigation of uncertain structural system is introduced. The fuzzy logic controllers (FLCs), are designed independently of the mathematical model of the system. The type-1 FLCs, have a limited ability to reduce the effect of uncertainty, due to their fuzzy sets with a crisp degree of membership. In real applications, the consequent part of the fuzzy rules is uncertain. The type-2 FLCs, are robust to the fuzzy rules and the process parameters due to the fuzzy degree of membership functions and footprint of uncertainty (FOU). The adaptivity of the proposed method is provided with the optimum tuning of the parameters using the neural network training algorithms. In our approach, the PID control force is obtained using the generalized type-2 neuro-fuzzy in such a way that the stability and robustness of the controller are guaranteed. The robust performance and stability of the presented framework are demonstrated in a numerical study for an eleven-story seismically-excited building structure combined with an active tuned mass damper (ATMD). The results indicate that the introduced type-2 neuro-fuzzy PID control scheme is effective to attenuate plant states in the presence of the structured and unstructured uncertainties, compared to the conventional, type-1 FLC, type-2 FLC, and type-1 neuro-fuzzy PID controllers.

Nonlinear Buckling Analysis of Cones with Rectangular Cutouts, Numerical and Experimental Investigation

Mohammad Javad Kabiri Renani,Javad Jafari Fesharaki 한국강구조학회 2020 International Journal of Steel Structures Vol.20 No.1

In this paper a new regression relation for nonlinear ultimate buckling resistance of the cones with rectangular cutouts is presented. For this purpose, the eff ective geometry parameters and material properties such as the length, thickness, large diameter and angle of the cone, the length, width and location of cutout, the modulus of elasticity, yield stress and plastic properties are considered. Then using response surface method, 288 design of experiment is considered and a regression relation for predict the ultimate buckling resistance is proposed. To validate the results, two types of real experiment are presented and the results show that there is good agreement between the experimental tests and proposed relation. Then the eff ects of changing the various parameters on the ultimate buckling resistance of the cone are investigated. The results show that locating the cutout near the large diameter of the cone has more infl uence than locating near the small diameter. Also, the location of cutout has more infl uence at higher thickness. Also, the yield stress has more infl uence on ultimate buckling resistance at higher values of thickness. In addition, decreasing the length of the cone or increasing the diameter of the cone increase the ultimate buckling resistance and increasing the angle of cone decrease the ultimate buckling resistance of the cone

Comparative Evaluation of Antioxidant and Anti Food-borne Bacterial Activities of Essential Oils from Some Spices Commonly Consumed in Iran

Javad Aliakbarlu,Surur Khalili Sadaghiani,Shadieh Mohammadi 한국식품과학회 2013 Food Science and Biotechnology Vol.22 No.6

The antioxidant potency, anti food bornebacterial activity, and total phenolic contents of essentialoils (EOs) from avishane shirazi (Zataria multiflora), clove(Syzgium aromaticum), cinnamon (Cinnamomum zeylanicum),cumin (Cuminum cyminum), black cumin (Buniumpersicum), spearmint (Mentha spicata), horsemint (Menthalongifolia), coriander (Coriandrum sativum), sage (Salviaofficinalis), and ginger (Zingiber officinale) were evaluated. In 2,2-diphenyl-1-picrylhydrazyl (DPPH) assay, free radicalscavenging activities of clove and avishane shirazi EOswere 90.69% and 88.63%, respectively. In reducing powerassay, the EO of clove showed the highest reducingcapacity. The highest concentrations of total phenolics(66.01 mg and 44.81 mg GAE/gram sample) were alsodetected for the EOs of clove and avishane shirazi,respectively. The results of disc diffusion assay showedthat the EOs of avishane shirazi, cinnamon, and clovestrongly inhibited growth of the tested bacteria. The EO ofcinnamon had the lowest minimal inhibitory concentration(MIC) (0.312 mg/mL).

Distributed Adaptive Dynamic Surface Control for Synchronization of Uncertain Nonlinear Multi-agent Systems

Javad Tousi,Marzieh Kamali,Iman Izadi,Farid Sheikholeslam 제어·로봇·시스템학회 2018 International Journal of Control, Automation, and Vol.16 No.6

In this paper a distributed adaptive dynamic surface controller is proposed for multi-agent systems under fixed directed graph topologies. The agents have uncertain nonlinear dynamics and are influenced by bounded unknown disturbances. The controller should synchronize the states of all agents with the corresponding states of the nonautonomous leader. It is proved that, with the proposed controller, the synchronization error remains bounded; and the bounds can be arbitrarily decreased by increasing the controller gains. The control rules are designed such that each agent only requires the state information of its neighbors, rendering a distributed control. The effectiveness of the proposed method is demonstrated through two simulation examples.

Fruit Quality, Anthocyanin, and Cyanidin 3-Glucoside Concentrations of Several Blood Orange Cultivars Grown in Different Areas of Iran

Javad Fattahi,Reza Fotouhi,Davoud Bakhshi,Sirous Aghajanzadeh 한국원예학회 2009 Horticulture, Environment, and Biotechnology Vol.50 No.4

Fruit quality and its appearance are very important from consumer’s view point. The fruits of ‘Moro’, ‘Tarocco’, ‘Sanguinello’, and ‘Sanguine’ blood orange cultivars were harvested at the stage of commercial maturity in Kotra (North) and Darab (South) counties in Iran. After harvesting, the fruits were analyzed for Hunter value, total soluble solids (TSS) content, titratable acidity (TA), and concentrations of anthocyanin and cyanidin 3-glucoside. ‘Tarroco’ fruits from Darab region showed high Hunter L value (70.3). The oranges harvested in Kotra had a hue angel value of more than 80. Chroma values were at the highest amount in ‘Tarocco’ with 70.6 values. Generally, TSS was higher in the cultivars grown in south than north. ‘Sanguinella’ and ‘Sanguine’ fruits had the highest TA in both regions. Cyanidin 3-glucoside contents of ‘Tarocco’ (South) and ‘Moro’ (North) were 368.2 and 196.05 ㎎ㆍL?¹, respectively, which were higher than the others. However, ‘Sanguinello’ and ‘Sanguine’ fruits grown in the southern region contained higher amount of cyanidin 3-glucoside than those in the northern area. In this experiment, we found that climate was the major influence on main component and anthocyanin of fruits. ‘Tarocco’ and ‘Moro’ fruits had high quality in south and north counties, respectively.

Physioelectrochemical Investigation of Electrocatalytic Activity of Modified Carbon Paste Electrode in Alcohol Oxidation as Anode in Fuel Cell

Javad Shabani-Shayeh,Ali Ehsani,Majid Jafarian 한국전기화학회 2014 한국전기화학회지 Vol.17 No.3

Methanol electro oxidation on the surface of carbon paste modified by NiCl2/6H2Owas studied in 1M NaOH by potentiostatic and potentiodynamic methods. Ni/C catalyst bythe concentration of 5% Ni showed about twice higher electro catalytic activity than Ni metal. The amount of monolayer’s on the surface of electrode is almost one order higher for Ni/Cthan Ni electrode. The kinetic parameters and the diffusion coefficient of methanol were derivedfrom chronoamperometry (CA) and electrochemical impedance spectroscopy (EIS) measurements

Seismic Rehabilitation of Tall Steel Moment Resisting Frames Damaged by Fire with SMA-Based Hybrid Friction Damper

Javad Shakeri,Gholamreza Abdollahzadeh 한국강구조학회 2020 International Journal of Steel Structures Vol.20 No.1

The existence probability of buildings, which have been under fi re and not been collapsed for various reasons is not low, thus they are in dangerous situation to deal with future earthquakes, therefore more attention due to high risk should be given. For this purpose, a research based on the nonlinear time history analysis has been conducted on two tall steel moment resisting frames. By loading fi re to the fi re collapse threshold on steel frames under various fi re scenarios, a hazardous structure can be modeled due to fi re history, which is the same initial deformation for seismic loading. The paper proposes a new seismic rehabilitation method for steel frames includes the friction damper-superelastic shape memory alloy wires, which experienced a fi re event up to collapse threshold in the past. The proposed damper provides not only a hysteretic behavior and high centering capacity with low SMA consumption, but also has some advantages such as simple confi guration and economic applicability. The results show that the use of the proposed damper, provides an excellent reversibility capability in addition to the eff ective increase in the ductility-stiff ness and lateral strength which results in a signifi cant reduction in terms of maximum drift at the global level and maximum fl exural moment of the beam and the column members at the local level of the structure. The results of this paper indicate that the proposed damper can bring the steel frame to the desired structural performance with the least cost and the number of brace spans.

Orthopedic infections: no one is denying anymore that we have a problem!

( Javad Parvizi ) 대한슬관절학회 2019 대한슬관절학회지 Vol.31 No.1

Performance of under foundation shock mat in reduction of railway-induced vibrations

Javad Sadeghi,Ehsan Haghighi,Morteza Esmaeili 국제구조공학회 2021 Structural Engineering and Mechanics, An Int'l Jou Vol.78 No.4

Under foundation shock mats have been used in the current practice in order to reduce/damp vibrations received by buildings through the surrounding environment. Although some investigations have been made on under foundation shock mats performance, their effectiveness in the reduction of railway induced-vibrations has not been fully studied, particularly with the consideration of underneath soil media. In this regard, this research is aimed at investigating performance of shock mat used beneath building foundation for reduction of railway induced-vibrations, taking into account soil-structure interaction. For this purpose, a 2D finite/infinite element model of a building and its surrounding soil media was developed. It includes an elastic soil media, a railway embankment, a shock mat, and the building. The model results were validated using an analytical solution reported in the literature. The performance of shock mats was examined by an extensive parametric analysis on the soil type, bedding modulus of shock mat and dominant excitation frequency. The results obtained indicated that although the shock mat can substantially reduce the building vibrations, its performance is significantly influenced by its underneath soil media. The softer the soil, the lower the shock mat efficiency. Also, as the train excitation frequency increases, a better performance of shock-mats is observed. A simplified model/method was developed for prediction of shock mat effectiveness in reduction of railway-induced vibrations, making use of the results obtained.