Structural health monitoring for a 600 m high skyscraper

Li, Qiusheng; He, Yuncheng; Zhou, Kang; Han, Xu-Liang; Shu, Z.R.

doi:10.1002/tal.1490

Cited by 79 publications

(29 citation statements)

References 29 publications

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“…Building C is a 118‐story building with a total height of 600 m located in Shenzhen, China, as introduced in Li et al The skyscraper is currently the second tallest building in China and the fourth tallest in the world. The structural system of Building C consists of eight composited steel‐reinforced concrete mega‐columns, four outrigger trusses, and core‐tube, while the core‐tube and mega columns are connected by four outrigger trusses to improve the lateral stiffness and overall integrity of the skyscraper .…”

Section: Data Analysis Of Field Measurementsmentioning

confidence: 99%

Damping estimation of high‐rise buildings considering structural modal directions

Zhou

Xiao

2020

Earthq Engng Struct Dyn

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One widespread problem in damping estimation of high-rise buildings is the neglect of structural modal directions, which may induce beating in measured dynamic responses along building geometric axes and thereby induce errors in damping estimations to some extent. Based on a proposed two degrees of freedom (2-DOF) simulation model, the effects of neglecting the modal directions on damping estimate are systematically investigated. The results show that the angular differences between the modal directions and the building geometric axes, as well as the frequency difference between the involved modes, both have significant effects on the damping estimate of high-rise buildings. This paper proposes a spectral method to determine the modal directions of highrise buildings and further validate this method by an analysis of full-scale measurements from four skyscrapers. The damping ratios estimated based on the responses along the identified modal directions are more accurate than those based on those measured along the building geometric axes. Furthermore, an empirical prediction model for damping ratio of high-rise buildings with heights over 200 m is proposed based on the field measured damping results of several buildings with consideration of the modal directions. The objective of this study is to improve the accuracy of damping estimation of high-rise buildings and therefore provide useful information for the structural design of future skyscrapers. K E Y W O R D Sdamping estimate, damping model, field measurement, high-rise building, modal direction

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Section: Data Analysis Of Field Measurementsmentioning

confidence: 99%

Damping estimation of high‐rise buildings considering structural modal directions

Zhou

Xiao

2020

Earthq Engng Struct Dyn

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“…For the sake of ensuring the safety and serviceability of PAFC during its life circle, a SHM system has been implemented in the skyscraper. The SHM system consists of 13 types of equipment, including 553 sensors and instruments, which is capable to provide life‐cycle monitoring on the structural performance during the construction and service stages . Although numerous sensors of the SHM system (eg, pressure transducers, accelerometers, and fiber Bragg grating strain gauges) were installed and in operation during this field measurement study, this paper focuses on the analysis of the measurements from four accelerometers installed on PAFC.…”

Section: Field Vibration Tests On Pafcmentioning

confidence: 99%

Identification of modal parameters of a 600‐m‐high skyscraper from field vibration tests

Zhang

2019

Earthq Engng Struct Dyn

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Summary Accurate prediction of the dynamic responses of a high‐rise building subjected to dynamic loads such as earthquake and wind excitations requires the information of its structural dynamic properties such as modal parameters including natural frequencies and damping ratios. This paper presents the identification results of the modal parameters based on field vibration tests on a 600‐m high skyscraper. A set of tests, including ambient vibration test (AVT) and free vibration test (FVT), were conducted on the skyscraper to identify its modal parameters. Firstly, this paper presents and discusses the modal parameters of the skyscraper assessed by several identification methods applied to the AVT measurements. These methods include the wavelet transform (WT) method, the stochastic subspace identification (SSI) method, and the random decrement technique (RDT). Secondly, an active mass damper (AMD) system with total mass 1000 tons equipped into the skyscraper was used to excite the building for estimation of the modal parameters by FVT. Thirdly, this paper presents observations on the structural dynamic behavior of the skyscraper with the operation of the AMD system during a typhoon event. The field measurement results show that the AMD system functioned efficiently for suppression of the wind‐induced vibrations of the skyscraper during the typhoon. This paper aims to further understand the structural dynamic properties of super‐tall buildings and provide useful information for structural design and vibration control of future skyscrapers.

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“…Full‐scale structures, in situ, represent the most relevant testbed for the development, testing, and validation of methods for forward and inverse problems in earthquake and wind engineering, including soil–structure system identification and structural health monitoring (SHM) . Although the number of instrumented structures has been increasing with time, the number of densely instrumented structures is still small even worldwide . This paper presents a new such site being developed in China, with a relatively dense sensor network and some unique features.…”

Section: Introductionmentioning

confidence: 99%

“…In mainland China, there are several extensively instrumented skyscrapers/towers, all on the east coast, where exposure to typhoons is the primary natural hazard. They include the Guangzhou New TV Tower (610 m tall with versatile SHM system, including 22 channels of acceleration), the Shanghai Tower (a 632‐m‐tall skyscraper with versatile SHM system, including 72 channels of acceleration), the Shanghai World Financial Center (a 492‐m high building instrumented with 45 triaxial accelerometers), and the Ping An Finance Center in Shenzhen (a 600 m high skyscraper with versatile SHM system, including 10 biaxial accelerometers) . In Yunnan Province, there are two instrumented buildings, both instrumented with standalone triaxial sensors .…”

Section: Introductionmentioning

confidence: 99%

A new full‐scale testbed for structural health monitoring and soil–structure interaction studies: Kunming 48‐story office building in Yunnan province, China

Todorovska

Niu

Lin

et al. 2020

Struct Control Health Monit

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Summary This paper introduces a new and unique full‐scale testbed site for structural health monitoring and soil–structure system identification studies being developed in southwest China. The site is a 48‐story skyscraper with an extended four‐level basement, supported by piles, located in Kunming, the capital of Yunnan Province. Located in the diffused zone of collision of the Indian and Eurasian tectonic plates, Yunnan is one of the most active seismic areas in mainland China. The final sensor deployment will consist of 43 triaxial accelerometers (129 channels) and one weather station. The accelerometer array comprises (a) a structural array of 25 accelerometers installed at 10 levels aboveground, (b) a basement array of 14 accelerometers distributed in the first and fourth basements, and (c) two borehole arrays installed close to the basement perimeter wall, each with one accelerometers at the surface and another one at 50‐m depth, which is the depth reached by the piles. With such dense instrumentation of structure, basement, and pile foundation, this site will be the first permanently instrumented full‐scale testbed to enable identification of a soil‐foundation–basement‐structure system and validation of many assumptions commonly made in the prediction of the soil–structure interaction effects. A high‐performance wired local area network has been installed in the building, featuring a Precision Time Protocol‐enabled time synchronization and real‐time remote access over the Internet. The site will be fully operational in late spring of 2020. Results of preliminary system identification of the structure from ambient vibration test data are presented.

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Structural health monitoring for a 600 m high skyscraper

Cited by 79 publications

References 29 publications

Damping estimation of high‐rise buildings considering structural modal directions

Damping estimation of high‐rise buildings considering structural modal directions

Identification of modal parameters of a 600‐m‐high skyscraper from field vibration tests

A new full‐scale testbed for structural health monitoring and soil–structure interaction studies: Kunming 48‐story office building in Yunnan province, China

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