Seismic optimization analysis of high-rise buildings with a buckling-restrained brace outrigger system

被引：28

作者：

Xing, Lili ^{[1
]}

Zhou, Ying ^{[1
]}

Huang, Wei ^{[2
]}

机构：

[1] Tongji Univ, State Key Lab Disaster Reduct Civil Engn, Shanghai 200092, Peoples R China

[2] Xian Univ Architecture & Technol, Coll Civil Engn, Xian 710055, Shaanxi, Peoples R China

来源：

ENGINEERING STRUCTURES | 2020年 / 220卷

基金：

中国国家自然科学基金;

关键词：

Buckling-restrained brace outrigger; Response spectrum analysis; Optimal damped outrigger location; Dynamic simplified model; Fitting equation; DYNAMIC CHARACTERISTICS; TALL BUILDINGS; PARAMETER; SUBJECT; FRAMES; MODEL; WALL;

D O I：

10.1016/j.engstruct.2020.110959

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

A damped outrigger system is developed to improve the conventional outrigger system by providing supplemental damping to control vibration in high-rise buildings. The optimal seismic performance of a buckling-restrained brace (BRB) outrigger system is investigated in this study using a spectrum-analysis-based simplified model. This simplified model is first calibrated by an ANSYS model via response history analysis. It is then used to perform numerous parametric analyses to determine the optimal damped outrigger location and damping ratio. Subsequently, a comprehensive dimensionless parameter associated with all the data obtained from the parametric analyses is obtained to solve a fitted equation of the optimal damped outrigger location. And the top displacement is also fitted with regard to the period to construct an equation of the top displacement spectra. These fitted equations can contribute to the preliminary design of BRB outrigger buildings.

引用

页数：12

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