A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Effect of Diaphragm Flexibility on Tall Building Responses
The floor plates of buildings play an important role in redistributing horizontal forces among vertical lateral-load carrying substructures. It is a customary in engineering practice to assume a rigid diaphragm constraint to model floors for lateral force analyses of building structures. The concept that building structures with flexible diaphragms behave differently from systems with rigid diaphragms is fundamental. The practice of assuming rigid diaphragm is not necessarily conservative. In the past, studies have been carried out, predominatly for low-rise building, to find out differences in response if floors were modelled as flexible diaphragm instead of rigid. The objective of this paper is to evaluate the impact of diaphragm flexibility on the structural response of a tall building. A detailed model of the floor that includes all primary structural members is constructed. The in-plane diaphragm stiffness of the detailed floor model is computed and used to arrive at an equivalent shell element floor model. This equivalent shell element model is then inserted in the 64-story diagrid tall building global model. The study shows that, structures modelled with flexible diaphragms can experience higher accelerations and displacements than structures modelled with rigid diaphragms, and their fundamental periods of vibration can be noticeably longer.
Effect of Diaphragm Flexibility on Tall Building Responses
The floor plates of buildings play an important role in redistributing horizontal forces among vertical lateral-load carrying substructures. It is a customary in engineering practice to assume a rigid diaphragm constraint to model floors for lateral force analyses of building structures. The concept that building structures with flexible diaphragms behave differently from systems with rigid diaphragms is fundamental. The practice of assuming rigid diaphragm is not necessarily conservative. In the past, studies have been carried out, predominatly for low-rise building, to find out differences in response if floors were modelled as flexible diaphragm instead of rigid. The objective of this paper is to evaluate the impact of diaphragm flexibility on the structural response of a tall building. A detailed model of the floor that includes all primary structural members is constructed. The in-plane diaphragm stiffness of the detailed floor model is computed and used to arrive at an equivalent shell element floor model. This equivalent shell element model is then inserted in the 64-story diagrid tall building global model. The study shows that, structures modelled with flexible diaphragms can experience higher accelerations and displacements than structures modelled with rigid diaphragms, and their fundamental periods of vibration can be noticeably longer.
Effect of Diaphragm Flexibility on Tall Building Responses
Bhuiyan, Mohammad T. (author) / Leon, Roberto T. (author)
Structures Congress 2013 ; 2013 ; Pittsburgh, Pennsylvania, United States
Structures Congress 2013 ; 2286-2297
2013-04-30
Conference paper
Electronic Resource
English
Effect of Diaphragm Flexibility on Tall Building Responses
| British Library Conference Proceedings | 2013
Tall story - Tall building -- Big diaphragm wall
Online Contents | 2008
Peak Seismic Responses of Tall Building and Subsoil
| British Library Conference Proceedings | 1996
Across-wind responses of an aeroelastic tapered tall building
| Elsevier | 2008
Fin and Diaphragm Walls in Tall Single‐Storey Buildings
| Wiley | 2006