Stiffness Effects of Structural Elements on the Seismic Response of RC High-Rise Buildings

Abstract

The stiffness of structural elements (columns, beams, and slabs) significantly contributes to the overall stiffness of reinforced concrete (RC) high-rise buildings (H.R.B.s) subjected to earthquake. In order to investigate what percentage each type of element contributes to the overall performance of an H.R.B. under seismic load, the stiffness of each type of element is reduced by 10% to 90%. A time history analysis by SAP2000 was performed on thirteen 3D models of 12-story RC buildings in order to illustrate the contribution of column stiffness and column cross sections (rectangular or square), building floor plans (square or rectangular), beam stiffness and slab stiffness, on building resistance to an earthquake. The stiffness of the columns contributed more than the beams and slabs to the earthquake resistance of H.R.B.s. Rectangular cross-section columns must be properly oriented in order for H.R.B.s and slender buildings to attain the maximum resistance against earthquakes.

Passive Control of Ultra-Span Twin-Box Girder Suspension Bridges under Vortex-Induced Vibration Using Tuned Mass Dampers: A Sensitivity Analysis

“…Tuned mass dampers have been widely employed in numerous studies for vibration control [26,[36][37][38][39][40][41][42][43], with their straightforward design process and low maintenance costs being their key attributes. On the other hand, their downsides include high sensitivity to mistuning, significant space requirements for installation, and an inability to adapt their parameters to dynamic applied loads.…”

“…[26,[36][37][38][39][40][41][42][43], with their straightforward design process and low maintenance costs being their key attributes. On the other hand, their downsides include high sensitivity to [26,[36][37][38][39][40][41][42][43], with their straightforward design process and low maintenance costs being their key attributes. On the other hand, their downsides include high sensitivity to [26,[36][37][38][39][40][41][42][43], with their straightforward design process and low maintenance costs being their key attributes.…”

“…On the other hand, their downsides include high sensitivity to [26,[36][37][38][39][40][41][42][43], with their straightforward design process and low maintenance costs being their key attributes. On the other hand, their downsides include high sensitivity to [26,[36][37][38][39][40][41][42][43], with their straightforward design process and low maintenance costs being their key attributes. On the other hand, their downsides include high sensitivity to [26,[36][37][38][39][40][41][42][43], with their straightforward design process and low maintenance costs being their key attributes.…”

Wind-related structural stiffness and stiffness reduction factors

“…'s seismic performance, and its stiffness is lowered by 10% to 90%. SAP2000 performed a time history and Farghaly, 2018). Farghaly (2015) used the stiffness reduction coefficient to simulate how frame structures behave when they are affected by earthquake loads and made comments on building work as a result.…”

Wind-Related Structural Stiffness and Stiffness Reduction Factors

“…While the application of these concepts may be appropriately intricate, they are similar to the practical aspects of structural engineering. Researchers [7][8][9][10][11][12][13][14][15][16][17] have used the stiffness reduction coefficient to simulate how frame structures behave when they are affected by earthquake loads and made comments on the building work as a result. There have also been a lot of experimental studies on the effects of structural displacement.…”