What values of lateral load we need to use in order to perform push over analysis in abaqus for a high rise steel structure?
Nusrat Lateef Although it requires careful engineering judgment to accurately consider the forces acting on a structure, let's use an example of a 10-story building in Birmingham to illustrate how lateral loads for pushover analysis in Abaqus can be determined. To determine the lateral loads for pushover analysis in Abaqus for a 10-story building in Birmingham, the process begins by consulting the relevant design code for high-rise steel structures in the area. Based on this code, seismic and wind loads should be calculated, considering factors such as building height, occupancy, and location. These loads should then be combined with gravity loads to create realistic load combinations as prescribed by the code. For the pushover analysis, it's important to incrementally apply these lateral loads to the structure, defining appropriate loading increments to capture nonlinear behavior accurately. Given that high-rise steel structures exhibit nonlinear responses under lateral loads, it's important to ensure that the Abaqus analysis incorporates this by using suitable material models and element formulations. Additionally, accurate boundary conditions need to be defined, including fixed or pinned supports at the base and considering conditions at higher levels, such as rigid diaphragms for floor slabs. Before proceeding with the analysis, it's important to verify the lateral loads and analysis setup by comparing them with simplified analytical methods or similar structures' results. Finally, performing sensitivity analysis by varying the lateral loads within a reasonable range will allow for understanding the effects of different loading scenarios and assessing the building's structural robustness effectively.
thankyou so much for your replies. I really appreciate that.
which analysis is better push over or dynamic explicit? i have tried both but dynamic explicit gets aborted due to the error " constraints and connectors are not allowed at nodes with anisotropic mass" when i havent put any constraints/connectors?
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