Browsing New Zealand Society for Earthquake Engineering by Author "765839e1-4690-4d8c-bd79-2a1c401d887b"
Now showing items 1-16 of 16
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A Review on Nonlinear Time History Analysis of Structures
Hashemi, Gholamreza; Ramhormozian, Shahab; Clifton, G Charles (2024-04-09)Nonlinear time history analysis (NTHA) is a powerful approach for assessing the seismic response of buildings, enabling engineers to better understand and predict the structural behavior under dynamic loading. This review ... -
A statistical approach to determine the seismic design parameters in the asymmetric sliding hinge joint using Belleville Springs
Mountfort, Jason; Ramhormozian, Shahab; Clifton, G. Charles (2020-04-22)The design philosophy has changed over the past 20 years in seismic engineering. Structures moved from failing in a controlled ductile manner, to low damage design, to more recently, nearly no damage design (S. Ramhormozian, ... -
An attempt to determine a relationship between a mass-spring-friction damper single-degree-of-freedom system’s equivalent viscous damping ratio and its corresponding friction coefficient
van Rensburg, Kiyan; Ramhormozian, Shahab (2021-04-14)Damping forces are always present in real structures, occurring in several different forms, making them challenging to model expressly. Damping is often assumed to be viscous in nature, due to the simplicity of the ... -
Comparison between weld sizing methods included in steel structure standards
Taheri, Hafez; Karpenko, Michail; Clifton, G. Charles; Ramhormozian, Shahab; Dong, Pingsha; Lim, James B. P.; Roy, Krishanu; Fang, Zhiyuan (2024-04-09)Although the weld sizing methods given in standards look simple, the actual stress distribution in most welds is complex. Some simplifications are assumed to make designing welds easier for design engineers in different ... -
Concept design of a steel frames post-disaster shelter utilising containers
Li, Jiaoyang; Xing, Heming; Tse, Julie; Cui, Yao; Ramhormozian, Shahab (2020-04-22)Nowadays, numerous earthquakes happen every year with many resulting in large potential aftershocks. Tents and portable dwellings are widely used as emergency shelters. However, tents can only be used for days or weeks, ... -
Determining the realistic rotational stiffness of column base connections in steel seismic resisting systems
He, Jin Chang Winston; Clifton, Charles; Ramhormozian, Shahab (2021-04-14)The New Zealand Steel Structures Standard, NZS 3404, provides an upper and lower rotational stiffness boundary for fixed and pinned column base connections for structural analysis, respectively. These boundaries aim to ... -
Developing hysteresis curves for the optimised sliding hinge joint with asymmetric friction connections
Togher, Jake; Speirs, Carlos; Clifton, G. Charles; Ramhormozian, Shahab (2020-04-22)The semi-rigid Sliding Hinge Joint (SHJ) beam-column connection for steel moment resisting frames is a successful low damage system that shows a lot of promise in earthquake engineering. It allows for relative beam-column ... -
Experimental and Analytical Study of Fillet Welds for Seismic Actions
Ramhormozian, Shahab; Zhang, Mark; Clifton, Charles; Karpenko, Michail; Taheri, Hafez (2024-04-09)New Zealand steel standards NZS3404 uses a simplified method to predict the weld design capacity and to size the weld. According to the industry feedback on the design and manufacturing of the seismic welded connections, ... -
Finite Element Convergence Study of the Asymmetric Friction Connection (AFC) in the Optimised Sliding Hinge Joint (OSHJ)
Alizadeh, Fatemeh; Ramhormozian, Shahab; Clifton, Charles (2023-04-19)The Optimised Sliding Hinge Joint (OSHJ) is a cost-effective, low damage seismic resisting beam-column connection developed for Moment Resisting Steel Framed (MRSF) buildings. The OSHJ is the optimised version of the ... -
Finite Element Modelling (FEM) of the Asymmetric Friction Connection (AFC) with Belleville Springs (BeSs): challenges and ongoing developments
Alizadeh, Fatemeh; Ramhormozian, Shahab; Clifton, G Charles (2024-04-09)The Sliding Hinge Joint (SHJ) is a low-damage beam-column connection used in steel moment-resisting frames. It allows large beam-column rotation to occur with minimal damage, through sliding in asymmetric friction connections ... -
Numerical parametric analysis of gravity column base-plate connections
He, Jin Chang Winston; Clifton, Charles; Ramhormozian, Shahab (2023-04-19)Gravity column base-plate connections are normally treated as pinned connections in design. Correspondingly, a low rotational stiffness value is specified in the New Zealand steel design standard, NZS 3404. However, previous ... -
Seismic application of fillet and partial penetration butt welds
Taheri, Hafez; Karpenko, Michail; Clifton, Charles; Ramhormozian, Shahab; Dong, Pingsha; Lim, James; Roy, Kris (2023-04-19)Fillet and partial (incomplete) penetration butt welds are the most cost-effective weld details for structural steel connections. Correctly sized and executed, double-sided, balanced fillet welds and partial penetration ... -
The Optimised Sliding Hinge Joint (OSHJ): Design, Detail, and Implementation in Practice
Ramhormozian, Shahab; Clifton, Charles; Gledhill, Sean; Muller, Maximo (2021-04-14)The Optimised Sliding Hinge Joint (OSHJ) is a low-damage, resilient, versatile, and cost effective seismic resisting system developed primarily for Moment Resisting Steel Framed (MRSF) buildings. The OSHJ is the optimized ... -
The ROBUST Steel Building Response
MacRae, Gregory; JIA, Liang-Jiu; Yan, Zhenduo; Clifton, Charles; Ramhormozian, Shahab; Dhakal, Rajesh; Xiang, Ping; Rodgers, Geoff; Quenneville, Pierre; Zhao, Xianzhong (2024-04-09)The ROBUST test programme describes the full-scale shaking table testing of nine different steel frame building configurations on the Tongji University shaking tables. Energy dissipation occurs by means of friction devices ... -
The seismic performance of structural steel buildings in the 2010/2011 Christchurch Earthquake series and the 2016 Kaikoura earthquake: lessons learned, ongoing research and needs of industry
Mohandas, Kiran; Ramhormozian, Shahab; Clifton, G. Charles; MacRae, Gregory Anthony (2020-04-22)At least 20 earthquakes greater than Ms 7 have taken place in New Zealand since 1850. The recent earthquake that occurred in Kaikoura (Ms 7.8) is considered one of the largest earthquakes since 1855, but Christchurch's ... -
Three-storey Configurable Steel Framed Building Incorporating Friction Based Energy Dissipaters: Structural Configuration and Instrumentation
Yan, Zhenduo; Bagheri, Hamed; Ramhormozian, Shahab; Clifton, Charles; Rangwani, Kiran; MacRae, Gregory; Quenneville, Pierre; Rodgers, Geoffrey; Xiang, Ping; Jia, Liang-Jiu; Zhao, Xianzhong (2021-04-14)A 9 m high, full-scale three-storey configurable steel frame composite floor building incorporating friction based connections is being tested using two linked bi-directional shake tables at the International joint research ...