On the Design of High-Rise Buildings for Multihazard: Fundamental Differences between Wind and Earthquake Demand

Aly, Aly Mousaad; Abburu, Srinivasa

doi:10.1155/2015/148681

Cited by 40 publications

(36 citation statements)

References 45 publications

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“…Wind loads and responses in high-rise buildings depend on wind direction angle and interference of existing building in that area. Since the approaching wind flow may have different mean wind speeds when it reaches the building from different directions, and considering the fact that along-wind and the cross wind responses are different, it is feasible to rotate original building layout in such a way that the wind induced responses are reduced [57]. From the dynamic procedures and the tests in the wind tunnel, it is possible to understand the most correct layout for building, especially if other tall buildings will rise up nearby [58].…”

Section: Global Layoutmentioning

confidence: 99%

Structural Improvements for Tall Buildings under Wind Loads: Comparative Study

Longarini

Cabras

Zucca

et al. 2017

Shock and Vibration

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The behavior of a very slender building is investigated under wind loads, to satisfy both strength and serviceability (comfort) design criteria. To evaluate the wind effects, wind tunnel testing and structural analysis were conducted, by two different procedures: (i) Pressure Integration Method (PIM), with finite element modeling, and (ii) High Frequency Force Balance (HFFB) technique. The results from both approaches are compared with those obtained from Eurocode 1 and the Italian design codes, emphasizing the need to further deepen the understanding of problems related to wind actions on such type of structure with high geometrical slenderness. In order to reduce wind induced effects, structural and damping solutions are proposed and discussed in a comparative study. These solutions include (1) height reduction, (2) steel belts, (3) tuned mass damper, (4) viscous dampers, and (5) orientation change. Each solution is studied in detail, along with its advantages and limitations, and the reductions in the design loads and structural displacements and acceleration are quantified. The study shows the potential of damping enhancement in the building to mitigate vibrations and reduce design loads and hence provide an optimal balance among resilience, serviceability, and sustainability requirements.

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Section: Global Layoutmentioning

confidence: 99%

Structural Improvements for Tall Buildings under Wind Loads: Comparative Study

Longarini

Cabras

Zucca

et al. 2017

Shock and Vibration

Self Cite

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“…However, in all the studies the devices were designed for consideration of single hazard either wind or earthquake excitations. Only few studies are exist that the researchers checked the performance of the controllers for wind and earthquake excitations [11,12]. Based on detailed literature survey conducted no such study is seen that the effect of multi-hazard on the performance of the tall building without control (NC) and controlled by different passive TVAs were taken into account.…”

Section: Introductionmentioning

confidence: 99%

Tuned Vibration Absorbers for Control of Tall Buildings Under Wind and Earthquake Loads

Elias¹,

Rupakhety²,

Ólafsson³

2019

Proceedings of the 7th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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This study presents an application of tuned vibration absorbers (TVAs) to reduce dynamic response of tall buildings under multiple excitations such as wind and earthquake ground motion. A finite element model of a typical tall building is prepared with rotational degrees of freedom reduced by static condensation. Mechanical models of TVAs are incorporated in the model. The coupled equations of motion are formulated and solved using numerical methods. The uncontrolled building (NC) and the controlled building are subjected to a number of near fault earthquake ground motions and wind forces (mass excitations). The effectiveness of using multiple TVAs as opposed to a single TVA (STVA) is investigated. The design parameters affecting the effectiveness of the TVA arrangements are chosen to investigate optimal setups. It is observed that STVA are more effective for wind response mitigation than seismic response mitigation of tall buildings. Multiple TVAs are, however, found to be effective for controlling both wind and earthquake induced vibrations. It is concluded that optimally designed TVAs are effective in controlling vibration of buildings subjected to action of wind and earthquake loads.

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“…However, the detailed results show that these buildings were unable to perform well under lateral loads even at low seismic intensities. More recently, Aly and Abburu (2015) conducted a full dynamic case study to observe the behavior of high-rise buildings against earthquake and wind loads while assessing the basic difference between seismic and wind demands. The two tall buildings (76-and 54-story) were examined against seismic and wind hazard using the Nonlinear Response History Analysis (NLRHA) and wind tunnel test, respectively.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Wind Loads on the Seismic Performance of Tall Buildings

Thilakarathna¹,

Anwar²,

Norachan³

et al. 2018

AJTE

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Wind and earthquake loadings are the two major types of lateral dynamic excitations experienced by high-rise buildings. An efficient design must ensure the safety of structural and non-structural components of a building against both types of loadings. This study evaluates the seismic performance of high-rise buildings primarily designed based on different levels of lateral wind loads. A 40-story dual system case study building is selected for this purpose. In dual systems, the lateral load is mainly resisted by a combination of reinforced concrete core wall and the special moment resisting frame. The case study building is assumed to be located in a moderate-level seismic zone and is separately designed for wind loading using three different levels of wind speeds (low, moderate and high), which are selected to represent the anticipated hazards at various global wind zones. The detailed seismic performance exhibited by three different design cases (corresponding to different levels of wind hazard) is evaluated. The Nonlinear Response History Analysis (NLRHA) procedure is used to obtain the true inelastic seismic demands and to compare the seismic performance of all three design cases. The results showed that the level of design wind load can alter the seismic performance of high-rise dual system buildings. Therefore, even for the cases where the wind demands control the design of lateral load-resisting system, the detailed performance-based seismic evaluation should be carried out to ensure the overall structural safety and integrity.

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On the Design of High-Rise Buildings for Multihazard: Fundamental Differences between Wind and Earthquake Demand

Cited by 40 publications

References 45 publications

Structural Improvements for Tall Buildings under Wind Loads: Comparative Study

Structural Improvements for Tall Buildings under Wind Loads: Comparative Study

Tuned Vibration Absorbers for Control of Tall Buildings Under Wind and Earthquake Loads

The Effect of Wind Loads on the Seismic Performance of Tall Buildings

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