Outputs (11)

Development of adjustable fluid damper device for the bridges subjected to traffic loads (2022)
Journal Article
Farahpour, H., & Hejazi, F. (2023). Development of adjustable fluid damper device for the bridges subjected to traffic loads. Structures, 47, 1295-1322. https://doi.org/10.1016/j.istruc.2022.11.136

In this research, an Adjustable Bypass Fluid Damper (ABFD) is developed by utilizing a pair of external fluid flow pipes and flow control valves. The flow control valves control the flow pressure of the fluid passing through bypass pipes and adjusted... Read More about Development of adjustable fluid damper device for the bridges subjected to traffic loads.

Hybrid rubber-concrete isolation slab system with various shape factors for structures subjected to horizontal and vertical vibrations (2022)
Journal Article
Fayyadh, N. K., & Hejazi, F. (2023). Hybrid rubber-concrete isolation slab system with various shape factors for structures subjected to horizontal and vertical vibrations. The Structural Design of Tall and Special Buildings, 32(4), Article e1995. https://doi.org/10.1002/tal.1995

The present framework proposed the development of a Hybrid Rubber-Concrete Isolation Slab System (HRCISS) to support building structures subjected to horizontal and vertical vibration due to ground motion and machine or equipment operation in the str... Read More about Hybrid rubber-concrete isolation slab system with various shape factors for structures subjected to horizontal and vertical vibrations.

Reinforced concrete beams externally strengthened by CFRP rods with steel plate, anchorage bolts, and concrete jacketing (2022)
Journal Article
Alkhateeb, M. Y., & Hejazi, F. (2022). Reinforced concrete beams externally strengthened by CFRP rods with steel plate, anchorage bolts, and concrete jacketing. Structures, 46, 1994-2013. https://doi.org/10.1016/j.istruc.2022.11.024

This study proposed a new scheme for the retrofitting of Reinforced Concrete (RC) beams using Carbon Fiber Reinforced (CFRP) rods restrained using steel plates and anchorage bolts called the mechanical anchorage system (MAS). This system also employe... Read More about Reinforced concrete beams externally strengthened by CFRP rods with steel plate, anchorage bolts, and concrete jacketing.

A low computational cost seismic analyses framework for 3D tunnel-form building structures (2022)
Journal Article
Mohsenian, V., Nikkhoo, A., Hajirasouliha, I., & Hejazi, F. (2022). A low computational cost seismic analyses framework for 3D tunnel-form building structures. Advances in Structural Engineering, 25(14), 2938-2952. https://doi.org/10.1177/13694332221113040

Numerical modeling of tunnel-form buildings entails the utilization of 3D finite element models consisting of large numbers of shell and fiber elements. Accordingly, the non-linear analysis of such models under seismic excitations is both time-consum... Read More about A low computational cost seismic analyses framework for 3D tunnel-form building structures.

Fracture mechanics modeling of reinforced concrete joints strengthened by CFRP sheets (2022)
Journal Article
Hejazi, F., Karim, H., Kazemi, H., Shahbazpanahi, S., & Mosavi, A. (2022). Fracture mechanics modeling of reinforced concrete joints strengthened by CFRP sheets. Case Studies in Construction Materials, 17, e01273. https://doi.org/10.1016/j.cscm.2022.e01273

Nowadays, fracture mechanics modeling for strengthening structural members is a challenging issue for structural engineers. The developed fracture mechanics modeling was applicable for identifying propagation of a crack in concrete structural members... Read More about Fracture mechanics modeling of reinforced concrete joints strengthened by CFRP sheets.

Rubber bearing isolator with granular and polymer filler core and application on a building (2022)
Journal Article
Tan, K. C., & Hejazi, F. (2022). Rubber bearing isolator with granular and polymer filler core and application on a building. Structures, 42, 309-332. https://doi.org/10.1016/j.istruc.2022.06.006

In the present study, a new core-and-filler system was proposed to use in elastomer bearings as a substitution to hazardous lead core while improving the performance of base isolators. The proposed system utilizes steel core and filler consists of ei... Read More about Rubber bearing isolator with granular and polymer filler core and application on a building.

Development of hybrid optimization algorithm for structures furnished with seismic damper devices using the particle swarm optimization method and gravitational search algorithm (2022)
Journal Article
Ayyash, N., & Hejazi, F. (2022). Development of hybrid optimization algorithm for structures furnished with seismic damper devices using the particle swarm optimization method and gravitational search algorithm. Earthquake Engineering and Engineering Vibration, 21(2), 455-474. https://doi.org/10.1007/s11803-022-2088-1

Previous studies about optimizing earthquake structural energy dissipation systems indicated that most existing techniques employ merely one or a few parameters as design variables in the optimization process, and thereby are only applicable only to... Read More about Development of hybrid optimization algorithm for structures furnished with seismic damper devices using the particle swarm optimization method and gravitational search algorithm.

Development of floating rubber-concrete isolation slab system for 3D vibrations (2022)
Journal Article
Fayyadh, N. K., Hejazi, F., & Chong, T. (2022). Development of floating rubber-concrete isolation slab system for 3D vibrations. Journal of Building Engineering, 51, 104246. https://doi.org/10.1016/j.jobe.2022.104246

Nowadays by implementing of various machineries and equipment, the structures are subjected to multidirectional vibrations as combination of vertical and horizontal cyclic oscillations. The slabs are the main structural components, imposed to the dyn... Read More about Development of floating rubber-concrete isolation slab system for 3D vibrations.

Plasticity model for partially prestressed concrete (2022)
Journal Article
Hafezolghorani, M., Hejazi, F., Jaffar, M. S., & Adeli, H. (2022). Plasticity model for partially prestressed concrete. Structures, 38, 630-651. https://doi.org/10.1016/j.istruc.2022.02.008

Recently, the partially prestressed concrete (PPC) has been widely used as an effective construction technique for structures to reduce yielding and damages. However, there is no proper analytical model for PPC frame elements (beam-column members) to... Read More about Plasticity model for partially prestressed concrete.

Development of elastomeric rubber bearing utilizing core-and-filler system (2022)
Journal Article
Tan, K. C., Hejazi, F., Mohammadi Esfahani, H., & Chong, T. (2022). Development of elastomeric rubber bearing utilizing core-and-filler system. Structures, 37, 125-139. https://doi.org/10.1016/j.istruc.2021.12.074

Elastomeric bearing is the most common base isolation system for structures and bridges to dissipate effect of applied vibration and ground motion. To improve performance of the base isolators, lead core is implemented in the rubber bearings and it s... Read More about Development of elastomeric rubber bearing utilizing core-and-filler system.