Dr Iman Hajirasouliha
Department of Civil and Structural Engineering
Senior Lecturer in Structural Engineering
i.hajirasouliha@sheffield.ac.uk
+44 114 222 5710
+44 114 222 5710
Room:C109e, Sir Frederick Mappin Building (Broad Lane Building)
Full contact details
Dr Iman Hajirasouliha
Department of Civil and Structural Engineering
Room:C109e
Sir Frederick Mappin Building (Broad Lane Building)
Mappin Street
Sheffield
S1 3JD
Department of Civil and Structural Engineering
Room:C109e
Sir Frederick Mappin Building (Broad Lane Building)
Mappin Street
Sheffield
S1 3JD
- Profile
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My research aims to make structures that are more resilient to extreme load events, such as earthquakes or explosions, and enable structural engineers to construct safer buildings using less materials.
Dr Iman Hajirasouliha
Iman obtained his PhD in 2006 from Sharif University of Technology, one of the top technical universities in the Middle East.
After being a lecturer in the Civil Engineering Department at University of Science and Culture for two years, he was awarded a Marie Curie Research Fellowship (En-core MCRTN) at the University of Sheffield on the use of internal FRP reinforcement in new reinforced concrete structures.
In 2009, he received a prestigious Individual Marie Curie International Incoming Fellowship (IIF) at The University of Sheffield on optimum strengthening of deficient reinforced concrete buildings using FRP composites.
From 2010 to 2012, he was a Lecturer in Structural Engineering at the University of Nottingham, where he was convener of Advanced Concrete Structures and Earthquake Engineering and Structural Dynamics modules.
He was then appointed Lecturer in Structural Engineering in the Department in 2012 and was promoted to Senior Lecturer in 2015. He is currently the leader of the Earthquake Engineering Group (EEG) and Deputy Director of Research in the Department.
Research Themes
- Research interests
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In general, Iman’s research aims to develop practical methods to improve the structural performance of structures and make them more resilient to extreme load events, such as earthquakes or explosions.
His research into practical design guidelines for engineers has led to the development of simplified performance-based optimum design methodologies for structural engineers to enable them to produce safer buildings at minimum costs.
Iman has been principal or co-investigator of several EU and nationally funded projects (total value of approximately €8M).
He has extensive research experience in earthquake engineering, performance-based design, structural strengthening, optimisation, cold-formed steel (CFS) structures, energy dissipation devices, progressive collapse, and soil-structure interaction.
- Publications
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Journal articles
- More efficient design of CFS strap-braced frames under vertical and seismic loading. Journal of Constructional Steel Research, 185, 106886-106886.
- Development of more accurate cyclic hysteretic models to represent RBS connections. Engineering Structures, 245, 112899-112899.
- Structural performance of RC columns retrofitted with steel-reinforced grout jackets under combined axial and lateral loading. Engineering Structures, 245, 112946-112946.
- Performance-based seismic design of moment resisting steel frames: Adaptive optimisation framework and optimum design load pattern. Structures, 33, 1690-1704.
- Deep learning-based procedure for structural design of cold-formed steel channel sections with edge-stiffened and un-stiffened holes under axial compression. Thin-Walled Structures, 166, 108076-108076.
- Performance-based assessment of CFS strap-braced stud walls under seismic loading. Journal of Constructional Steel Research, 183, 106731-106731.
- More efficient design of reduced beam sections (RBS) for maximum seismic performance. Journal of Constructional Steel Research, 183, 106728-106728.
- Optimisation of cold-formed steel beams for best seismic performance in bolted moment connections. Journal of Constructional Steel Research, 181, 106621-106621.
- Structural Size Optimization of Single and Built-Up Cold-Formed Steel Beam-Column Members. Journal of Structural Engineering, 147(4), 04021030-04021030.
- Behavior and Design of Cold-Formed Steel Bolted Connections Subjected to Combined Actions. Journal of Structural Engineering, 147(4), 04021013-04021013.
- Constrained optimization of anti-symmetric cold-formed steel beam-column sections. Engineering Structures, 228, 111452-111452.
- Axial behaviour of FRP-confined rubberised concrete: An experimental investigation. Construction and Building Materials, 267, 121023-121023.
- Performance evaluation of curved damper truss moment frames designed using equivalent energy design procedure. Engineering Structures, 226, 111363-111363.
- Seismic reliability analysis of steel moment-resisting frames retrofitted by vertical link elements using combined series–parallel system approach. Bulletin of Earthquake Engineering, 19(2), 831-862. View this article in WRRO
- Seismic performance assessment of eccentrically braced steel frames with energy-absorbing links under sequential earthquakes. Journal of Building Engineering, 33, 101576-101576.
- Seismic reliability assessment of RC tunnel-form structures with geometric irregularities using a combined system approach. Soil Dynamics and Earthquake Engineering, 139, 106356-106356.
- Optimal design of cold roll formed steel channel sections under bending considering both geometry and cold work effects. Thin-Walled Structures, 157, 107020-107020.
- Experimental study of the cross-sectional capacity of cold-formed steel built-up columns. Thin-Walled Structures, 155, 106958-106958.
- Life-cycle cost based design of bridge lead-rubber isolators in seismic regions. Structures, 27, 383-395.
- Optimum energy based seismic design of friction dampers in RC structures. Structures, 27, 2550-2562.
- Local buckling in cold-formed steel moment-resisting bolted connections : behavior, capacity and design. Journal of Structural Engineering, 146(9). View this article in WRRO
- Seismic performance evaluation of deficient steel moment-resisting frames retrofitted by vertical link elements. Structures, 26, 724-736. View this article in WRRO
- Reliability analysis and multi-level response modification factors for buckling restrained braced frames. Journal of Constructional Steel Research, 171, 106137-106137.
- Design and optimization of cold-formed steel sections in bolted moment connections considering bimoment. Journal of Structural Engineering, 146(8).
- Experimental study of cold-formed steel built-up beams. Journal of Structural Engineering, 146(7). View this article in WRRO
- Experimental and numerical investigations of cold-formed austenitic stainless steel unlipped channels under bearing loads. Thin-Walled Structures, 152, 106768-106768.
- Seismic performance assessment of eccentrically braced steel frames with energy-absorbing links under sequential earthquakes. Journal of Building Engineering.
- Tensile stress-strain characteristics of rubberised concrete from flexural tests. Construction and Building Materials, 236. View this article in WRRO
- Multi-criteria performance-based optimization of friction energy dissipation devices in RC frames. Earthquake and Structures, 2, 185-199. View this article in WRRO
- Experimental study of cold-formed steel built-up columns. Thin-Walled Structures, 149, 106291-106291.
- Development of a monolithic-like precast beam-column moment connection: Experimental and analytical investigation. Engineering Structures, 205. View this article in WRRO
- A practical probabilistic earthquake hazard analysis tool: case study Marmara region. Bulletin of Earthquake Engineering. View this article in WRRO
- Seismic reliability analysis and estimation of multilevel response modification factor for steel diagrid structural systems. Journal of Building Engineering. View this article in WRRO
- A practical methodology for optimum seismic design of RC frames for minimum damage and life-cycle cost. Engineering Structures, 202. View this article in WRRO
- Reliability of water distribution networks subjected to seismic hazard: Application of an improved entropy function. Reliability Engineering & System Safety, 197, 106828-106828.
- Ultra-lightweight engineered cementitious composite using waste recycled hollow glass microspheres. Journal of Cleaner Production, 249, 119331-119331.
- Multilevel seismic demand prediction for acceleration-sensitive non-structural components. Engineering Structures, 200. View this article in WRRO
- Coupled element and structural level optimisation framework for cold-formed steel frames. Journal of Constructional Steel Research. View this article in WRRO
- Adaptive low computational cost optimisation method for performance-based seismic design of friction dampers. Engineering Structures, 198. View this article in WRRO
- Dynamic column loss analysis of reinforced concrete flat slabs. Engineering Structures, 198. View this article in WRRO
- Vibration control of bridges under simultaneous effects of earthquake and moving loads using steel pipe dampers. JVC/Journal of Vibration and Control, 25(19-20), 2580-2594. View this article in WRRO
- Development of optimum cold-formed steel beams for serviceability and ultimate limit states using Big Bang-Big Crunch optimisation. Engineering Structures, 195, 172-181. View this article in WRRO
- Steel-Reinforced Grout (SRG) strengthening of shear-critical RC beams. Construction and Building Materials, 216, 68-83. View this article in WRRO
- Practical method for optimal rehabilitation of steel frame buildings using buckling restrained brace dampers. Soil Dynamics and Earthquake Engineering, 123, 242-251. View this article in WRRO
- A low computational cost method for vibration analysis of rectangular plates subjected to moving sprung masses. Advances in Computational Design, 4(3), 307-326. View this article in WRRO
- Estimation of seismic response parameters and capacity of irregular tunnel-form buildings. Bulletin of Earthquake Engineering. View this article in WRRO
- Effects of soil‐structure interaction and lateral design load pattern on performance‐based plastic design of steel moment resisting frames. The Structural Design of Tall and Special Buildings, e1624-e1624.
- Seismic performance of cold-formed steel bolted moment connections with bolting friction-slip mechanism. Journal of Constructional Steel Research, 156, 122-136. View this article in WRRO
- Simplified Method for Optimal Design of Friction Damper Slip Loads by Considering Near-Field and Far-Field Ground Motions. Journal of Earthquake Engineering. View this article in WRRO
- Experimental Investigation of Cross-Sectional Bending Capacity of Cold-Formed Steel Channels Subject to Local-Distortional Buckling Interaction. Journal of Structural Engineering, 145(7), 04019064-04019064. View this article in WRRO
- Shape Optimization of Cold-Formed Steel Beam-Columns with Practical and Manufacturing Constraints. Journal of Constructional Steel Research, 155, 249-259. View this article in WRRO
- Optimum Performance-based Design of Concentrically Braced Steel Frames Subjected to Near-field Ground Motion Excitations. International Journal of Optimization in Civil Engineering, 9(2), 177-193. View this article in WRRO
- Efficient design of cold-formed steel bolted-moment connections for earthquake resistant frames. Thin-Walled Structures. View this article in WRRO
- Strength and deflection behaviour of cold-formed steel back-to-back channels. Engineering Structures, 177, 641-654. View this article in WRRO
- Composites with recycled rubber aggregates: Properties and opportunities in construction. Construction and Building Materials, 188, 884-897.
- Seismic response modification factors for stiffness degrading soil-structure systems. Structural Engineering and Mechanics, 68(2), 159-170.
- Seismic risk assessment for developing countries: Pakistan as a case study. Earthquake Engineering and Engineering Vibration, 17(4), 787-804. View this article in WRRO
- Performance-based optimisation of RC frames with friction wall dampers using a low-cost optimisation method. Bulletin of Earthquake Engineering, 16(10), 5017-5040. View this article in WRRO
- Direct displacement-based seismic design of flexible-base structures subjected to pulse-like ground motions. Engineering Structures, 168, 276-289. View this article in WRRO
- Design-oriented models for concrete columns confined by steel-reinforced grout jackets. Construction and Building Materials, 178, 313-326. View this article in WRRO
- An improved replacement oscillator approach for soil-structure interaction analysis considering soft soils. Engineering Structures, 167, 26-38. View this article in WRRO
- Local-flexural interactive buckling of standard and optimised cold-formed steel columns. Journal of Constructional Steel Research, 144, 106-118. View this article in WRRO
- Nonlinear behaviour of reinforced concrete flat slabs after a column loss event. Advances in Structural Engineering, 1-15. View this article in WRRO
- Development of optimum cold-formed steel sections for maximum energy dissipation in uniaxial bending. Engineering Structures, 161, 55-67. View this article in WRRO
- Experimental investigation of local-flexural interactive buckling of cold-formed steel channel columns. Thin-Walled Structures, 125, 245-258. View this article in WRRO
- Analytical and experimental study on the seismic performance of cold-formed steel frames. Journal of Constructional Steel Research, 143, 18-31. View this article in WRRO
- Compressive behaviour of concrete columns confined with steel-reinforced grout jackets. Composites Part B: Engineering, 138, 222-231. View this article in WRRO
- A practical grid generation procedure for the design of free-form structures. Computers and Structures, 196, 292-310. View this article in WRRO
- More efficient lateral load patterns for seismic design of steel moment-resisting frames. Proceedings of the Institution of Civil Engineers: Structures and Buildings, 171(6), 472-486. View this article in WRRO
- Behaviour of unconfined and FRP-confined rubberised concrete in axial compression. Construction and Building Materials, 147, 388-397. View this article in WRRO
- Seismic retrofitting of RC buildings using CFRP and post-tensioned metal straps: shake table tests. Bulletin of Earthquake Engineering, 15(8), 3321-3347. View this article in WRRO
- Compressive behaviour of circular steel tube-confined concrete stub columns with active and passive confinement. Steel and Composite Structures, 24(3), 323-337. View this article in WRRO
- A Practical Method for Optimum Seismic Design of Friction Wall Dampers. Earthquake Spectra, 33(3), 1033-1052. View this article in WRRO
- Experimental study and calculation of laterally-prestressed confined concrete columns. Steel and Composite Structures: an international journal, 23(5), 517-527.
- Bond of substandard laps in RC beams retrofitted with post-tensioned metal straps. ACI Structural Journal, 113(6), 1197-1208. View this article in WRRO
- Estimation of inelastic displacement demands of flexible-based structures on soft soils. International Journal of Earthquake and Impact Engineering, 1(1/2), 81-97. View this article in WRRO
- Optimum Lateral Load Distribution for Seismic Design of Nonlinear Shear-Buildings Considering Soil-Structure Interaction. Soil Dynamics and Earthquake Engineering, 88, 356-368. View this article in WRRO
- Optimum design of cold-formed steel beams using Particle Swarm Optimisation method. Journal of Constructional Steel Research, 122, 80-93. View this article in WRRO
- Effect of stressed skin action on optimal design of cold-formed steel square and rectangular-shaped portal frame buildings. International Journal of Steel Structures, 16(2), 299-307.
- Analytical Study of the Seismic Performance of Steel-Braced Frames with Masonry Infill. Journal of Structural Engineering (ASCE), 142(10). View this article in WRRO
- Development of more efficient cold-formed steel channel sections in bending. Thin-Walled Structures, 101, 1-13. View this article in WRRO
- A new hybrid method for size and topology optimization of truss structures using modified ALGA and QPGA. JOURNAL OF CIVIL ENGINEERING AND MANAGEMENT, 23(2), 252-262. View this article in WRRO
- Influence of Higher Modes on Strength and Ductility Demands of Soil–Structure Systems. Journal of Earthquake and Tsunami, 10(4), 1-22. View this article in WRRO
- Performance-based seismic design of flexible-base multi-storey buildings considering soil–structure interaction. Engineering Structures, 108, 90-103. View this article in WRRO
- A simplified Nonlinear Sway-Rocking model for evaluation of seismic response of structures on shallow foundations. Soil Dynamics and Earthquake Engineering, 81, 14-26. View this article in WRRO
- Effects of uncertainties on seismic behaviour of optimum designed braced steel frames. Steel and Composite Structures, 20(2), 317-335. View this article in WRRO
- Strengthening of short splices in RC beams using Post-Tensioned Metal Straps. Materials and Structures, 49(1-2), 133-147. View this article in WRRO
- A Multi-hazard Risk Assessment of Buildings in Padang City. Procedia Engineering, 125, 1094-1100. View this article in WRRO
- Optimum drilled flange moment resisting connections for seismic regions. Journal of Constructional Steel Research, 112, 325-338. View this article in WRRO
- Cross-sectional optimization of cold-formed steel channels to Eurocode 3. Engineering Structures, 101, 641-651. View this article in WRRO
- Experimental investigation on the dynamic response of RC flat slabs after a sudden column loss. Engineering Structures, 99, 28-41.
- A new ductile moment-resisting connection for precast concrete frames in seismic regions: An experimental investigation. Engineering Structures, 70, 144-157. View this article in WRRO
- Full-Scale Shaking Table Tests on a Substandard RC Building Repaired and Strengthened with Post-Tensioned Metal Straps. Journal of Earthquake Engineering, 18(2), 187-213. View this article in WRRO
- Influence of masonry infill on the seismic performance of concentrically braced frames. Journal of Constructional Steel Research, 88, 150-163. View this article in WRRO
- Hysteretic performance of a new blind bolted connection to concrete filled columns under cyclic loading: An experimental investigation. Engineering Structures, 46, 535-546. View this article in WRRO
- Deflection behaviour of FRP reinforced concrete beams and slabs: An experimental investigation. Composites Part B: Engineering. View this article in WRRO
- An efficient Performance-Based Seismic Design of Reinforced Concrete Frames. Earthquake Engineering and Structural Dynamics, 40. View this article in WRRO
- General Seismic Load Distribution for Optimum Performance-Based Design of Shear-Buildings. Journal of Earthquake Engineering, 16(4), 443-462. View this article in WRRO
- Strength and deformability of waste tyre rubber-filled reinforced concrete columns. Construction and Building Materials, 25(1), 218-226. View this article in WRRO
- Topology optimization for the seismic design of truss-like structures. COMPUT STRUCT, 89(7-8), 702-711. View this article in WRRO
- A simplified model for seismic response prediction of concentrically braced frames. ADV ENG SOFTW, 41(3), 497-505. View this article in WRRO
- Seismic behaviour of deficient RC frames strengthened with CFRP composites. Engineering Structures, 32(10), 3075-3085. View this article in WRRO
- New Lateral Force Distribution for Seismic Design of Structures. J STRUCT ENG-ASCE, 135(8), 906-915. View this article in WRRO
- Optimum strength distribution for seismic design of tall buildings. Structural Design of Tall and Special Buildings, 17(2), 331-349. View this article in WRRO
- Toward more rational criteria for determination of design earthquake forces. International Journal of Solids and Structures, 43(9), 2631-2645. View this article in WRRO
- An investigation on the accuracy of pushover analysis for estimating the seismic deformation of braced steel frames. Journal of Constructional Steel Research, 62(4), 343-351. View this article in WRRO
- Fundamentals of optimum performance-based design for dynamic excitations. Scientia Iranica, 12(4), 368-378. View this article in WRRO
- Optimum seismic design of concentrically braced steel frames: concepts and design procedures. Journal of Constructional Steel Research, 61(2), 151-166. View this article in WRRO
- Numerical Study of Cyclic Performance and Design of a Novel Fan Bracing System. Journal of Earthquake Engineering, 1-30.
- Seismic reliability assessment of steel moment-resisting frames using Bayes estimators. Proceedings of the Institution of Civil Engineers - Structures and Buildings, 1-15.
- A new modified stochastic linearization technique to analyze structures with nonlinear fluid viscous dampers. Journal of Vibration and Control, 107754632110195-107754632110195.
- More efficient design of CFS strap-braced frames under vertical and seismic loading. Journal of Constructional Steel Research, 185, 106886-106886.
- Research group
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Earthquake Engineering Group
Steel & Composite Structures
Concrete Structures
- Grants
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RCUK-TUBITAK Research Partnerships
The aim of the project was to develop, an innovative, integrated and efficient framework for multi-hazard seismic risk assessment and disaster mitigation in developing countries. Earthquake related intelligence were obtained from smart devices in real-time for the first time and integrated in to the framework
- Professional activities
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- Associate Editor of International Journal of Earthquake and Impact Engineering (IJEIE)
- Member of the International Federation for Structural Concrete Task Group 6.6 " Retrofitting of Precast Structures in Seismic Areas "
- Distinguished Lecturer, University of Science and Culture, Iran (2007)
- Distinguished Young Researcher award, Iranian Earthquake Engineering Association (2006)
- Tavakoli Prize for conducting original research, Sharif University of Technology (2005)
- The British Council Chevening Scholarship award, The University of Sheffield (2003)
- Potential PhD offerings
Performance-based Optimisation Of Energy Dissipation Systems
This proposed project will lead to the development of practical procedures for the optimum design of added dissipation systems in framed structures. The proposed design method will be based on a novel optimisation technique that has been introduced by Dr Iman Hajirasouliha and successfully used for seismic design and strengthening of different structural systems. The work will involve analysis, design and computer modelling.
Seismic Strengthening Of RC Using External Lateral Post-tensioning
The project will investigate this technique both experimentally and analytically and develop models for its application in vulnerable buildings.
Novel Cold-formed Steel Structural Systems For Multi-storey Buildings
The main aim of this research is to enhance strength and ductility of CFS structural systems (elements and connections) to increase their resistance and overall safety under extreme loading events, through the development of special connections and high-performance dual wall-frame systems.