Uniform deformation design of outrigger braced skyscrapers: A simplified method for the preliminary design stage

Alavi, Arsalan; Mele, Elena; Rahgozar, Reza; Farsangi, Ehsan Noroozinejad; Takewaki, Izuru; Mariotti, C.

doi:10.1016/j.istruc.2021.01.099

Cited by 17 publications

(4 citation statements)

References 30 publications

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“…Therefore, many studies are undertaken to understand the actions of tall structures with outriggers excited for lateral load, and one of the study is presented in [44]. Alavi et al [45] proposed the new stiffness-based method for the preliminary design of outrigger structure based on uniform distribution of deformation by keeping curvature of the beam constant. This proposed method was presented through a simplified hand calculation algorithm considering only the lateral loads and output of the novel method gave normal stress distribution uniform along with building height that was lower than permissible value [45].…”

Section: Development Of Outrigger Structural System From Tall Buildingsmentioning

confidence: 99%

“…Alavi et al [45] proposed the new stiffness-based method for the preliminary design of outrigger structure based on uniform distribution of deformation by keeping curvature of the beam constant. This proposed method was presented through a simplified hand calculation algorithm considering only the lateral loads and output of the novel method gave normal stress distribution uniform along with building height that was lower than permissible value [45]. Alavi et al [45] considered only the lateral load but the vertical load was not considered in the proposed method that provides a research gap in improving the stiffness-based method for the tall building considering all the parameters in the analysis including a programing based output for preliminary and final parametric analysis.…”

Section: Development Of Outrigger Structural System From Tall Buildingsmentioning

confidence: 99%

“…This proposed method was presented through a simplified hand calculation algorithm considering only the lateral loads and output of the novel method gave normal stress distribution uniform along with building height that was lower than permissible value [45]. Alavi et al [45] considered only the lateral load but the vertical load was not considered in the proposed method that provides a research gap in improving the stiffness-based method for the tall building considering all the parameters in the analysis including a programing based output for preliminary and final parametric analysis. The author in paper [16] found that the equation for core rotation, restraining moment, top drift, the optimal location of outrigger to reduce the drift, and non-dimensional parameter Ω to understand the behavior of an idealized multi-outrigger structure which is the function flexural rigidity ratio was also formulated to simplify the analysis.…”

Section: Development Of Outrigger Structural System From Tall Buildingsmentioning

confidence: 99%

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Evolution of Outrigger Structural System: A State-of-the-Art Review

2021

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This paper presents the development of the outrigger structural system from the conventional outrigger to damped outrigger concepts. Outrigger structural system development from the conservative design as a rigid connection to a virtual connection with passive control, active control system, semi-active control system to hybrid control system is deliberated. Following brief overviews on history of outriggers, types of the outrigger, analysis of tall buildings without outriggers, formulation of equations for outrigger structure to simplify analysis are elaborated. Different approach to locate optimum positioning of outriggers in tall structure is elucidated. Analysis of outrigger to study its behavior in high-rise buildings using different methods is stated, and review on the damped outrigger system is explicated. This paper tries to highlight the advantages of outrigger structure with semi-active control and performance enhancement of the outrigger system with the effective devices, and enhanced results are also depicted. This review also paves a way for the new area of research in structural control with the incorporation of smart devices and smart technology.

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Section: Development Of Outrigger Structural System From Tall Buildingsmentioning

confidence: 99%

Section: Development Of Outrigger Structural System From Tall Buildingsmentioning

confidence: 99%

Section: Development Of Outrigger Structural System From Tall Buildingsmentioning

confidence: 99%

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Evolution of Outrigger Structural System: A State-of-the-Art Review

2021

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“…However, the computational cost of this method is relatively high. Alavi et al (2021) proposed a stiffness-based method for the preliminary design of outrigger-braced skyscrapers based on the concept of uniform distribution of deformation.The bending stiffness of the core, outrigger-belt location, and section sizes of external columns were regarded as design variables and were determined using the proposed algorithm by controlling the curvature to be identical and minimized at all points.…”

Section: Introductionmentioning

confidence: 99%

Practical optimal design method for multi-outrigger building structures under inter-story drift constraints

Sun

Jia

2022

Advances in Structural Engineering

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This study proposes a practical optimal design method (PODM) for high-rise multi-outrigger structures subjected to inter-story drift constraints based on the optimality criteria method. The problem is solved through two-step calculations, which avoids time-consuming iterations owing to internal-force redistribution caused by member-section modifications, multiple inter-story drift constraints and multiple outriggers. Three parameters, namely the target virtual strain energy density (VSED), section-correction factor, and structural magnification factor, are established to relate the member-section sizes to the structural inter-story drift. The influence of internal-force redistribution is considered by adjusting the target VSED and section-correction factor based on the first trial calculation results to ensure precision. The multiple local inter-story drift constraints are converted to the unforced inter-story drift constraint, whereas the optimal design problem of the structures with multiple outriggers is solved by transforming it into the optimal design problem of the key module with the strictest demand by introducing the most critical constraint criteria. Finally, the effectiveness and accuracy of the PODM are validated using a 56-story structure and 50-story seven-bay framework.

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Progressive collapse performances of outrigger-braced reinforced concrete buildings with transfer floor

Selman

2024

Sādhanā

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Uniform deformation design of outrigger braced skyscrapers: A simplified method for the preliminary design stage

Cited by 17 publications

References 30 publications

Evolution of Outrigger Structural System: A State-of-the-Art Review

Evolution of Outrigger Structural System: A State-of-the-Art Review

Practical optimal design method for multi-outrigger building structures under inter-story drift constraints

Progressive collapse performances of outrigger-braced reinforced concrete buildings with transfer floor

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