Event Title
A Comparative Study of Linear and Nonlinear Analysis of High-Rise Buildings Against Wind Loads
Location
Cork Institute of Technology, Cork, Ireland
Event Website
https://event.ceri2020.exordo.com/
Start Date
27-8-2020 11:45 AM
End Date
27-8-2020 1:00 PM
Description
Tall and slender buildings present design challenges to structure designer to establish maximum sway against the wind loads. In Ireland and UK, most engineers use linear static analysis to determine forces and moments in the RC stability cores due to fact that linear analysis is less sophisticate and is easy to use. Engineers use E & I modification factors to take account of reduced stiffness of walls due to cracked concrete sections to complete the sway assessment. Non-linear analysis is another approach that can be used however it is not popular among many engineers as it requires more realistic material data input and it takes a lot more time to run. The main benefit of non-linear analysis is that it calculates the reduced stiffness of concrete elements automatically. It identifies the locations of plastic stresses and evaluates the reduced stiffness of elements. It re-runs the analysis with reduced material stiffness and finds the solution after multiple iterative process. The reduced stiffness of RC walls due to creep, shrinkage, time of loadings etc can also be modelled. This study estimates and compares the lateral deflection of a seventeen storeys tall building against wind loads using Tekla Structural Designer TSD (linear analysis) and ETABS (non-linear analysis). It is found that TSD underestimates 17% of RC stability cores lateral stiffness as compared with ETABS results.
Recommended Citation
Ali, Muhammad and Salawdeh, Suhaib, "A Comparative Study of Linear and Nonlinear Analysis of High-Rise Buildings Against Wind Loads" (2020). Civil Engineering Research in Ireland 2020. 1.
https://sword.cit.ie/ceri/2020/7/1
Included in
Civil Engineering Commons, Construction Engineering and Management Commons, Environmental Engineering Commons, Geotechnical Engineering Commons, Hydraulic Engineering Commons, Structural Engineering Commons, Transportation Engineering Commons
A Comparative Study of Linear and Nonlinear Analysis of High-Rise Buildings Against Wind Loads
Cork Institute of Technology, Cork, Ireland
Tall and slender buildings present design challenges to structure designer to establish maximum sway against the wind loads. In Ireland and UK, most engineers use linear static analysis to determine forces and moments in the RC stability cores due to fact that linear analysis is less sophisticate and is easy to use. Engineers use E & I modification factors to take account of reduced stiffness of walls due to cracked concrete sections to complete the sway assessment. Non-linear analysis is another approach that can be used however it is not popular among many engineers as it requires more realistic material data input and it takes a lot more time to run. The main benefit of non-linear analysis is that it calculates the reduced stiffness of concrete elements automatically. It identifies the locations of plastic stresses and evaluates the reduced stiffness of elements. It re-runs the analysis with reduced material stiffness and finds the solution after multiple iterative process. The reduced stiffness of RC walls due to creep, shrinkage, time of loadings etc can also be modelled. This study estimates and compares the lateral deflection of a seventeen storeys tall building against wind loads using Tekla Structural Designer TSD (linear analysis) and ETABS (non-linear analysis). It is found that TSD underestimates 17% of RC stability cores lateral stiffness as compared with ETABS results.
https://sword.cit.ie/ceri/2020/7/1
