Dynamic characteristics of novel energy dissipation systems with damped outriggers

Tan, Ping; Fang, Chuangjie; Chang, Chia‐Ming; Spencer, Billie F.; Zhou, Fulin

doi:10.1016/j.engstruct.2015.04.033

Cited by 56 publications

(37 citation statements)

References 20 publications

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“…Also, simplified modeling methods are fast and yield reasonably accurate design parameters if used correctly and a suitable set of assumptions is chosen. e multiple features of the simplified methods make the use of these methods vital during the initial design stage in order to determine the general design characteristics and initial parameters such as the dimensions of members in rational values and during the final design stage in order to check the computer analysis results manually [12,38,40,58,59,[61][62][63].…”

Section: Simplified Modeling Techniquesmentioning

confidence: 99%

“…In the reviewed articles, special discrete models for tall buildings with the outrigger and belttruss system have been developed by several researchers [22,36,51,80,81], such as (i) Two-dimensional frame model: in this method, the model is mainly based on the plane frame element that simplifies and models the whole structure into shear-deformable beam elements or classical beam elements. erefore, the core is considered as a vertical cantilever (Euler-Bernoulli beam), the outriggers can be represented by horizontal beams cantilevered from the core, and exterior columns are also considered as vertical beam elements with only axial stiffness [18,22,[36][37][38]63]. In the situation of damped outrigger system (linear viscous dampers), this method allows modeling the dampers between the end of outriggers and the perimeter columns [82,83].…”

Section: Discrete Approachmentioning

confidence: 99%

“…Hence, depending on the required behavior from the outrigger and belt-truss system, the optimum topology and size of the system can be calculated either for minimum external work of the system (i.e., minimum compliance or maximum global stiffness) if rigid behavior is required [111] or for maximum absorbed energy (maximum energy-dissipating capacity) by outriggers and belt trusses if ductile behavior is required [35,74,75]. In some research such as [63], maximizing the damping ratio represents the energy criterion in the optimization problem.…”

Section: Energy Criterionmentioning

confidence: 99%

“…(i) Placing the outriggers around the midheight of the building increases damping ratio [63]. (ii) With the increasing viscous damping coefficient, the optimal position of damped outriggers goes down at the first mode of vibration [63].…”

Section: Design Variables (Number and Location Of Outrigger And Belt mentioning

confidence: 99%

“…(iii) For higher energy dissipation, higher outrigger location is required in the situation of small dampers [63]. (iv) From the energy dissipation viewpoint, the importance of the optimum location of the outrigger trusses is less than the importance of the damper size [63]. [14,18,48].…”

Section: Design Variables (Number and Location Of Outrigger And Belt mentioning

confidence: 99%

See 4 more Smart Citations

Outrigger and Belt‐Truss System Design for High‐Rise Buildings: A Comprehensive Review Part II—Guideline for Optimum Topology and Size Design

Alhaddad

Halabi

et al. 2020

Advances in Civil Engineering

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This article is the second part of the series of the comprehensive review which is related to the outrigger and belt-truss system design for tall buildings. In this part, by presenting and analyzing as much relevant excellent resources as possible, a guideline for optimum topology and size design of the outrigger system is provided. This guideline will give an explanation and description for the used theories, assumptions, concepts, and methods in the reviewed articles for optimum topology and size design. Finally, this part ended up with a summary for the findings of the reviewed studies, which is useful to understand how different parameters influence the optimum topology and size design of a tall building with outrigger and belt-truss system.

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Section: Simplified Modeling Techniquesmentioning

confidence: 99%

Section: Discrete Approachmentioning

confidence: 99%

Section: Energy Criterionmentioning

confidence: 99%

Section: Design Variables (Number and Location Of Outrigger And Belt mentioning

confidence: 99%

Section: Design Variables (Number and Location Of Outrigger And Belt mentioning

confidence: 99%

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Outrigger and Belt‐Truss System Design for High‐Rise Buildings: A Comprehensive Review Part II—Guideline for Optimum Topology and Size Design

Alhaddad

Halabi

et al. 2020

Advances in Civil Engineering

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Frequency independent damped outrigger systems for multi‐mode seismic control of super tall buildings with frequency independent negative stiffness enhancement

Wang

Sun

Koetaka

et al. 2023

Earthq Engng Struct Dyn

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Damped outrigger system is effective for improving energy dissipation for tall buildings. However, conventional damped outrigger (CDO) system with viscous damping has two limitations: (i) its maximum damping ratio cannot be improved when outrigger/column stiffness is inadequate; (ii) different modes achieve their maximum damping ratios at different outrigger damping values, and thus the dampers cannot be optimized to simultaneously reduce vibrations of multiple modes of concern to their minimum. In this paper, a purely frequency‐independent negative stiffness damped outrigger (FI‐NSDO) system is proposed by combining frequency‐independent damper (FID) and negative stiffness device (NSD). The damped outrigger with FID can achieve the maximum damping ratio for all modes as compared to frequency‐dependent damper like viscous damper. As the NSD has the features of assisting and enhancing motion and frequency‐independence, the utilization of NSD will considerably improve the maximum damping ratios when outrigger/column stiffness is inadequate and maintain the frequency‐independent feature of the whole system. Therefore, the FI‐NSDO has the capability of simultaneously increasing the damping ratios of all target modes to their maximum values. Analysis in frequency domain and time domain, demonstrate that the proposed FI‐NSDO performs better in controlling the multi‐mode vibration of seismic responses.

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Performance-based seismic analysis on a super high-rise building with improved viscously damped outrigger system

Lü

Zhou

2018

Struct Control Health Monit

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Summary To investigate the seismic performance of a kind of improved viscously damped outrigger (IVDO) system, 6 elastoplastic models of a super high‐rise building (729 m) with multi‐IVDOs located at different heights have been established using PERFORM‐3D. Then, elastoplastic analysis on these models is carried out under 3 levels of earthquakes, namely, frequent, basic, and rare earthquakes. Comparison results of interstory drift, top displacement, base shear and overturning moment, additional damping ratio, maximum ratio of demand to capacity and other related indexes, and seismic performance assessments show that structure with IVDOs put at its lower height has larger additional damping ratio, smaller drift, and slighter degree of damage when it suffers from frequent and basic earthquakes. Reasonable damping ratio of building with IVDOs locating at lower height can also be achieved when rare earthquakes happen. Additionally, as belt truss is usually set at the same story where outrigger truss locates at to form closed spatial structure for better integrity, it is suggested belt truss at story where the IVDO locates or between 2 IVDOs should be optimized in case of premature bulking during earthquakes. It should also be noted that the IVDO can well reduce base overturning moment and have satisfactory control on base shear force and top displacement under basic and rare earthquakes, which is especially true in structure with IVDO installed at its lower height.

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Dynamic characteristics of novel energy dissipation systems with damped outriggers

Cited by 56 publications

References 20 publications

Outrigger and Belt‐Truss System Design for High‐Rise Buildings: A Comprehensive Review Part II—Guideline for Optimum Topology and Size Design

Outrigger and Belt‐Truss System Design for High‐Rise Buildings: A Comprehensive Review Part II—Guideline for Optimum Topology and Size Design

Frequency independent damped outrigger systems for multi‐mode seismic control of super tall buildings with frequency independent negative stiffness enhancement

Performance-based seismic analysis on a super high-rise building with improved viscously damped outrigger system

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