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Structural design of high-rise buildings

Hallebrand, Erik LU and Jakobsson, Wilhelm LU (2016) In TVSM-5000 VSM820 20161
Structural Mechanics
Department of Construction Sciences
Abstract
High-rise buildings are exposed to both static and dynamic loads. Depending on the method used and how the structure is modelled in finite element software the results can vary.

Some of the issues and modelling techniques, introduced below, are investigated in this Master’s thesis. Dynamic effects such as resonance frequencies and accelerations are considered. The variation in static results from reaction forces, overturning moments, deflections, critical buckling loads, forces between prefabricated elements and force distributions between concrete cores are investigated with different models. The models are evaluated by different elements and methods, such as construction stage analysis, to study the impact these have on the results.
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High-rise buildings are exposed to both static and dynamic loads. Depending on the method used and how the structure is modelled in finite element software the results can vary.

Some of the issues and modelling techniques, introduced below, are investigated in this Master’s thesis. Dynamic effects such as resonance frequencies and accelerations are considered. The variation in static results from reaction forces, overturning moments, deflections, critical buckling loads, forces between prefabricated elements and force distributions between concrete cores are investigated with different models. The models are evaluated by different elements and methods, such as construction stage analysis, to study the impact these have on the results.

Simplified calculations by hand according to different standards, regulations and codes such as SS-ISO, EKS and Eurocode have been compared with finite element analyses. The 3D-finite element software used for the analyses is Midas Gen.

From the results it can be observed, when modelling a high-rise building in a finite element software, that one model is often not sufficient to cover all different aspects. To see the global behaviour, one model can be used, and when studying the detailed results another model with a fine mesh, that have converged, is often needed. The same principle applies when evaluating horizontal and vertical loads, different models or methods are usually needed. (Less)
Popular Abstract (Swedish)
När en byggnad modelleras i ett datorprogram kan detta göras på flera olika sätt vilket resulterar i att resultaten från olika analyser varierar. Detta leder ofta till tidskrävande diskussioner mellan ingenjörer om vilken modell och resultat som är rätt. I examensarbetet tas olika modelleringstekniker upp och vilken inverkan de har på resultaten från datorberäkningarna. Detta för att korta ned tiden som ingenjörer diskuterar om de olika resultaten och på så vis få ett effektivare arbete. Dessutom tas olika vindeffekter på höga byggnader upp, såsom svaj och accelerationer i byggnaden.
Please use this url to cite or link to this publication:
author
Hallebrand, Erik LU and Jakobsson, Wilhelm LU
supervisor
organization
course
VSM820 20161
year
type
H3 - Professional qualifications (4 Years - )
subject
keywords
High-rise buildings, resonance frequencies, accelerations, shear flow, displacements, critical buckling load, finite element.
publication/series
TVSM-5000
report number
TVSM-5213
ISSN
0281-6679
language
English
id
8887415
alternative location
http://www.byggmek.lth.se/english/publications/tvsm-5000-masters-dissertations/
date added to LUP
2016-08-08 17:43:03
date last changed
2017-04-21 17:17:31
@misc{8887415,
  abstract     = {High-rise buildings are exposed to both static and dynamic loads. Depending on the method used and how the structure is modelled in finite element software the results can vary.

Some of the issues and modelling techniques, introduced below, are investigated in this Master’s thesis. Dynamic effects such as resonance frequencies and accelerations are considered. The variation in static results from reaction forces, overturning moments, deflections, critical buckling loads, forces between prefabricated elements and force distributions between concrete cores are investigated with different models. The models are evaluated by different elements and methods, such as construction stage analysis, to study the impact these have on the results.

Simplified calculations by hand according to different standards, regulations and codes such as SS-ISO, EKS and Eurocode have been compared with finite element analyses. The 3D-finite element software used for the analyses is Midas Gen.

From the results it can be observed, when modelling a high-rise building in a finite element software, that one model is often not sufficient to cover all different aspects. To see the global behaviour, one model can be used, and when studying the detailed results another model with a fine mesh, that have converged, is often needed. The same principle applies when evaluating horizontal and vertical loads, different models or methods are usually needed.},
  author       = {Hallebrand, Erik and Jakobsson, Wilhelm},
  issn         = {0281-6679},
  keyword      = {High-rise buildings,resonance frequencies,accelerations,shear flow,displacements,critical buckling load,finite element.},
  language     = {eng},
  note         = {Student Paper},
  series       = {TVSM-5000},
  title        = {Structural design of high-rise buildings},
  year         = {2016},
}