Bolt Loosening Localization at Flange Joints Using Wind-Induced Response for High-Rise Tower

2021 ◽  
Author(s):  
Baifeng Ji ◽  
Qian Xiong ◽  
Panpan Xing ◽  
Penghui Qiu ◽  
Weilian Qu
Keyword(s):  
Induced Response ◽  
High Rise ◽  
Bolt Loosening

scholarly journals Evaluation of Wind-Induced Response Bounds of High-Rise Buildings Based on a Nonrandom Interval Analysis Method

2018 ◽  
Vol 2018 ◽  
pp. 1-14
Author(s):  
Xianglei Wei ◽  
An Xu ◽  
Ruohong Zhao
Keyword(s):  
Wind Speed ◽  
Wind Tunnel ◽  
Wind Tunnel Test ◽  
Wind Load ◽  
Upper And Lower Bounds ◽  
Induced Response ◽  
Response Analysis ◽  
Analysis Method ◽  
High Rise ◽  
Interval Analysis Method

The traditional wind-induced response analysis of high-rise buildings conventionally considers the wind load as a stationary stochastic process. That is, for a certain wind direction angle, the reference wind speed (usually refers to the mean wind speed at the building height) is assumed to be a constant corresponding to a certain return period. Combined with the recorded data in wind tunnel test, the structural response can be computed using the random vibration theory. However, in the actual typhoon process, the average wind speed is usually time-variant. This paper combines the interval process model and the nonrandom vibration analysis method with the wind tunnel test and proposes a method for estimating the response boundary of the high-rise buildings under nonstationary wind loads. With the given upper and lower bounds of time-variant wind excitation, this method can provide an effective calculation tool for estimating wind-induced vibration bounds for high-rise buildings under nonstationary wind load. The Guangzhou East tower, which is 530 m high and the highest supertall building in Guangzhou, China, was taken as an example to show the effectiveness of the method. The obtained boundary response can help disaster prevention and control during the passage of typhoons.

scholarly journals Wind-Induced Response Control of High-Rise Buildings Using Inerter-Based Vibration Absorbers

2019 ◽  
Vol 9 (23) ◽  
pp. 5045 ◽  
Author(s):  
Qinhua Wang ◽  
Haoshuai Qiao ◽  
Dario De Domenico ◽  
Zhiwen Zhu ◽  
Zhuangning Xie
Keyword(s):  
Damping Ratio ◽  
Element Model ◽  
Tuned Mass Damper ◽  
Induced Response ◽  
Vibration Absorbers ◽  
Acceleration Response ◽  
Vibration Mitigation ◽  
High Rise ◽  
Mass Damper ◽  
Good Trade

The beneficial mass-amplification effect induced by the inerter can be conveniently used in enhanced variants of the traditional Tuned Mass Damper (TMD), namely the Tuned Mass-Damper-Inerter (TMDI) and its special case of Tuned Inerter Damper (TID). In this paper, these inerter-based vibration absorbers are studied for mitigating the wind-induced response of high-rise buildings, with particular emphasis on a 340 m tall building analyzed as case study. To adopt a realistic wind-excitation model, the analysis is based on aerodynamic forces computed through experimental wind tunnel tests for a scaled prototype of the benchmark building, which accounts for the actual cross-section of the structure and the existing surrounding conditions. Mass and stiffness parameters are extracted from the finite element model of the primary structure. Performance-based optimization of the TMDI and the TID is carried out to find a good trade-off between displacement- and acceleration-response mitigation, with the installation floor being an explicit design variable in addition to frequency and damping ratio. The results corresponding to 24 different wind directions indicate that the best vibration mitigation is achieved with a lower installation floor of the TMDI/TID scheme than the topmost floor. The effects of different parameters of TMD, TMDI and TID on wind-induced displacement and acceleration responses and on the equivalent static wind loads (ESWLs) are comparatively evaluated. It is shown that the optimally designed TMDI/TID can achieve better wind-induced vibration mitigation than the TMD while allocating lower or null attached mass, especially in terms of acceleration response.

scholarly journals Damping and Natural Period Evaluation of Tall RC Buildings Using Full-Scale Data in Korea

2020 ◽  
Vol 10 (5) ◽  
pp. 1568
Author(s):  
Taehyu Ha ◽  
Seung-Hoon Shin ◽  
Hongjin Kim
Keyword(s):  
Damping Ratio ◽  
Tall Buildings ◽  
Vibration Measurement ◽  
Ambient Vibration ◽  
Induced Response ◽  
Rc Buildings ◽  
Natural Period ◽  
Rc Structures ◽  
High Rise ◽  
Induced Motion

In recent years, the main usage of reinforced concrete (RC) structures in Korea has shifted from low-rise residential and commercial buildings to high-rise buildings. Because an increasing number of high-rise RC buildings are being built, especially in coastal cities, which are periodically hit by typhoons, wind-induced motion and the corresponding serviceability issues have attracted considerable attention. Natural period and damping ratio are the most important factors for estimating the design wind load and wind-induced response in the design of tall buildings. However, the Korean Building Code (KBC 2009) does not specify empirical formulae for estimating the natural period and damping ratio for wind design, unlike seismic design. In this study, the damping ratio and natural period of existing concrete buildings in Korea are measured and compared to those obtained using the formulae provided in various codes and research works. Furthermore, design formulae for estimating natural frequency and damping ratio for wind design are proposed based on the measured data. For this purpose, ambient vibration measurement is performed for 58 RC buildings with heights of 24.2–305 m.

scholarly journals Full-Scale Measurements of Translational and Torsional Dynamics Characteristics of a High-Rise Building during Typhoon Sarika

Materials ◽  
2022 ◽  
Vol 15 (2) ◽  
pp. 493
Author(s):  
Jiaxing Hu ◽  
Zhengnong Li ◽  
Zhefei Zhao
Keyword(s):  
Wind Speed ◽  
Frequency Domain ◽  
Wind Direction ◽  
Field Measurement ◽  
Full Scale ◽  
Induced Response ◽  
Wind Resistance ◽  
High Rise ◽  
High Rise Building ◽  
Translational Acceleration

The field measurement of wind-induced response is of great significance to the wind resistance design of high-rise buildings, in particular torsional responses measured from high-rise buildings under typhoons. The measured high-rise building, with a height of 108 m, has 32 stories and is supported by giant trusses with four massive columns. Acceleration responses along translational and torsional directions were monitored synchronously and continuously during the passage of Typhoon Sarika on 18 October 2016. The wind speed and wind direction at the height of 115 m, the translational accelerations on a total of six floors and the angular accelerations on a total of four floors were recorded. The time and frequency domain characteristics of translational acceleration and torsional angular accelerations were analyzed. The amplitude-dependent translational and torsional modal frequencies of the measured building were identified by NExT-ERA, SSI, and RDT methods. The full-scale study is expected to provide useful information on the wind-resistant design of high-rise buildings in typhoon-prone regions.

Wind‐Induced Response of Structurally Asymmetric High‐Rise Buildings

1992 ◽  
Vol 118 (1) ◽  
pp. 207-222 ◽  
Author(s):  
M. Saiful Islam ◽  
Bruce Ellingwood ◽  
Ross B. Corotis
Keyword(s):  
Induced Response ◽  
High Rise

Wind-Induced Vibration Response Analysis of a High-Rise Structure

2011 ◽  
Vol 94-96 ◽  
pp. 999-1002
Author(s):  
Yu Jie Pan ◽  
Zhong Rong Lv ◽  
Ji Ke Liu
Keyword(s):  
Random Process ◽  
Wind Engineering ◽  
Computational Time ◽  
Induced Response ◽  
Response Analysis ◽  
High Rise ◽  
Engineering Vibration ◽  
New Tv ◽  
Wind Induced Vibration ◽  
Wind Induced Vibration Response

Autoregressive (AR) method can provide a simulation of random process with relatively short computational time and acceptable accuracy while Newmark-β Method is a quick way to accomplish the response analysis. Therefore in this paper, the combination of these two methods will solve the problem of wind-induced response analysis quickly and precisely. According to several theories, such as wind engineering, vibration theory and random process, we succeed to model 37-dimensional correlated random wind velocity and it is used for the response analysis. Then we utilize Newmark-β method to analyze successfully and the key results demonstrate that Guangzhou New TV Tower does not satisfy the requirements in the building code of China thus vibration control is needed.

Effects of high modes on the wind-induced response of super high-rise buildings

2012 ◽  
Vol 11 (3) ◽  
pp. 427-434 ◽  
Author(s):  
Ruoqiang Feng ◽  
Guirong Yan ◽  
Jinming Ge
Keyword(s):  
Induced Response ◽  
High Rise
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