Modeling of shear-wall dominant symmetrical flat-plate reinforced concrete buildings

Abstract

An effective form-finding method for form-fixed spatial network structures is presented in this paper. The adaptive formfinding method is introduced along with the example of designing an ellipsoidal network dome with bar length variations being as small as possible. A typical spherical geodesic network is selected as an initial state, having bar lengths in a limit group number. Next, this network is transformed into the ellipsoidal shape as desired by applying compressions on bars according to the bar length variations caused by transformation. Afterwards, the dynamic relaxation method is employed to explicitly integrate the node positions by applying residual forces. During the form-finding process, the boundary condition of constraining nodes on the ellipsoid surface is innovatively considered as reactions on the normal direction of the surface at node positions, which are balanced with the components of the nodal forces in a reverse direction induced by compressions on bars. The node positions are also corrected according to the fixed-form condition in each explicit iteration step. In the serial results of time history, the optimal solution is found from a time history of states by properly choosing convergence criteria, and the presented form-finding procedure is proved to be applicable for form-fixed problems.

Effect of Shape and Size of Openings in Shear Walls on Lateral Deformations in Shear Walled Framed Structures

“…Furthermore, Balkaya and Kalkan [9] observed that with the change in the position of opening, there is a significant change in Tension/Compression coupling mechanism. Apart from these, the location of shear walls and the location of openings in the shear wall have been analysed by various authors using finite element method [10][11][12][13][14]. Recently, some investigations have been taken up to check the suitability of shear wall with openings for various cases of earthquake loadings [15][16][17].…”

“…In order to assess the adequacy of different empirical formulas to estimate structural period of vibration, Abdo [14] considered a shear wall (SW) dominant flat-plate 10-storey building structure. This rectangular plan building was designed according to the Egyptian code (2007) [19] and the same has been considered in the present investigation.…”

High-Rise Residential Reinforced Concrete Building Optimisation

“…Once the optimisation order is determined, the actual optimisation is the next step on the procedure [3] [4], but how do we perform this optimisation is the most important step to determine in an optimisation process. As has been introduced in the last part of the chapter, there are a great number of variables to optimise and if we consider the interaction between members there are almost an unlimited possibilities of optimisation.…”