Wind-induced vibration assessment of tower cranes attached to high-rise buildings under construction

2022 ◽  
Vol 135 ◽  
pp. 104132
Author(s):  
Yi Lu ◽  
Maoxing Gao ◽  
Tian Liang ◽  
Zheng He ◽  
Fan Feng ◽  
...  
2018 ◽  
Vol 33 ◽  
pp. 02067 ◽  
Author(s):  
Olga I. Poddaeva ◽  
Anastasia N. Fedosova ◽  
Pavel S. Churin ◽  
Julia S. Gribach

The design of buildings with a height of more than 100 meters is accompanied by strict control in determining the external loads and the subsequent calculation of building structures, which is due to the uniqueness of these facilities. An important factor, the impact of which must be carefully studied at the stage of development of project documentation, is the wind. This work is devoted to the problem of studying the wind impact on buildings above 100 meters. In the article the technique of carrying out of experimental researches of wind influence on high-rise buildings and constructions, developed in the Educational-research-and-production laboratory on aerodynamic and aeroacoustic tests of building designs of NRU MGSU is presented. The publication contains a description of the main stages of the implementation of wind tunnel tests. The article presents the approbation of the methodology, based on the presented algorithm, on the example of a high-rise building under construction. This paper reflects the key requirements that are established at different stages of performing wind impact studies, as well as the results obtained, including the average values of the aerodynamic pressure coefficients, total forces and aerodynamic drag coefficients. Based on the results of the work, conclusions are presented.


2020 ◽  
Vol 10 (3) ◽  
pp. 808 ◽  
Author(s):  
Lv Zhou ◽  
Jiming Guo ◽  
Xuelin Wen ◽  
Jun Ma ◽  
Fei Yang ◽  
...  

Accurate dynamic characteristics of super high-rise buildings serve as a guide in their construction and operation. Ground-based real aperture radar (GB-RAR) techniques have been applied in monitoring and analyzing the dynamic characteristics of different buildings, but only few studies have utilized them to derive the dynamic characteristics of super high-rise buildings, especially those higher than 400 m and under construction. In this study, we proposed a set of technical methods for monitoring and analyzing the dynamic characteristics of super high-rise buildings based on GB-RAR and wavelet analysis. A case study was conducted on the monitoring and analysis of the dynamic characteristics of the Wuhan Greenland Center (WGC) under construction (5–7 July 2017) with a 636 m design height. Displacement time series was accurately derived through GB-RAR and wavelet analysis, and the accuracy reached the submillimeter level. The maximum horizontal displacement amplitudes at the top of the building in the north–south and east–west directions were 18.84 and 15.94 mm, respectively. The roof displacement trajectory of the WGC was clearly identified. A certain negative correlation between the temperature and displacement changes at the roof of the building was identified. Study results demonstrate that the proposed method is effective for the dynamic monitoring and analysis of super high-rise buildings with noninvasive and nondestructive characteristics.


2018 ◽  
Vol 33 ◽  
pp. 02015
Author(s):  
Alexey Mylnik ◽  
Vladimir Mylnik ◽  
Elena Zubeeva ◽  
Olga Mukhamedzhanova

The article considers design, construction and operation features of high-rise facilities. The analysis of various situations, that come from improper designing, construction and operation of unique facilities, is carried out. The integrated approach is suggested, when the problems of choosing acceptable constructional solutions related to the functional purpose, architectural solutions, methods of manufacturing and installation, operating conditions for unique buildings and structures are being tackled. A number of main causes for the emergency destruction of objects under construction and operation is considered. A number of measures are proposed on the basis of factor classification in order to efficiently prevent the situations, when various negative options of design loads and emergency impacts occur.


2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Jianda Yu ◽  
Zhibo Duan ◽  
Xiangqi Zhang ◽  
Jian Peng

Based on the vibration reduction mechanism of compound damping cables, this study focuses on the wind-induced vibration control of high-rise structures with additional mass at the top. The differential equation of motion of the system under the action of the composite damping cable is established, and the analytical solution of the additional damping ratio of the structure is deduced, which is verified by model tests. The vibration response of the structure under the action of simple harmonic vortex excitation and randomly fluctuating wind loads is studied, and the effect of different viscous coefficients of the dampers in the composite damping cable and different installation heights of the damping cable on the vibration control is analyzed. The results show that a small vortex excitation force will cause large vibrations of low-dampened towering structures, and the structure will undergo buffeting under the action of wind load pulse force. The damping cable can greatly reduce the amplitude of structural vibration. The root means square of structural vibration displacement varies with damping. The viscosity coefficient of the device and the installation height of the main cable of the damping cable are greatly reduced.


2017 ◽  
Vol 150 ◽  
pp. 242-255 ◽  
Author(s):  
Yun Lee ◽  
Jin-Keun Kim ◽  
Hyun-Cheol Seol ◽  
Joo-Kyoung Yang ◽  
Ki-Jung Kim

1999 ◽  
Vol 2 (1) ◽  
pp. 69-83 ◽  
Author(s):  
Qiusheng Li ◽  
Hong Cao ◽  
Guiqing Li ◽  
Shujing Li ◽  
Dikai Liu

2021 ◽  
Vol 258 ◽  
pp. 09032
Author(s):  
Mikhail Kashirtsev ◽  
Dmitry Topchy

The aim of the study is to create a parametric model, using which it will be possible to formulate a program of measures carried out during the scientific and technical support of construction (STSC) for each specific object, as well as increase the efficiency of construction production by preventing unaccounted indicators during design. The uniqueness of this model lies in the fact that it adapts to the conditions of any object of high-rise construction. As a result, it will be possible to simulate a set of measures for the implementation of STSC for each unique object. Since the construction of a unique high-rise building requires the use of STSC, the question arises of the application of various methods and methods at each object. The unique high-rise buildings and structures considered within the framework of the STSC are unique, therefore, each needs to apply its own parameters relevant to a particular facility. For example, we can say that any parameter associated with the monitoring of the bases will be different for each object, since the ground conditions for each building under construction are different. To create a model, a number of parameters were selected that are most necessary for inclusion in the STSC regulation for the construction of unique high-rise buildings, and each parameter has its own criterion that varies depending on changes in the characteristics of the construction object. All parameters are either related to actual data on the construction object, such as: air temperature, soil conditions, material of load-bearing structures, etc., or depend on and are regulated by the regulatory documents of the Russian Federation. In this case, one can avoid the subjective opinion that occurs when using the method of expert assessments. Also, avoiding the method of expert assessments can reduce the time spent on the study itself, obtaining a result, and making a forecast.


Author(s):  
Toshihiro Tamaki ◽  
Hiroaki Kagaya ◽  
Fujikazu Sakai ◽  
Kazushi Ogawa ◽  
Yoshikazu Nishi ◽  
...  

Abstract In large structures such as towers of suspension bridges or cable-stayed bridges, we often need to suppress the wind-induced vibration for their safety. Especially in the construction stage, the structures are more flexible than the completed ones. This paper discusses the active dampers used to suppress the wind-induced vibration of a tower of a suspension bridge (The Kurushima Bridge 3P Tower) during the construction. The active damper was used to suppress the wind-induced vibration in multiple modes predicted by wind-tunnel test. The controller design of the dampers is based on an H∞ robust control theory. At each erection step, we measured the dynamic properties of the towers to adjust the parameters of the controller using the active dampers as vibration exciters. The measured dynamic properties of the active controlled structures are compared with those of a non-controlled structure. The analysis of free vibration shows the suppression performance of active damper as expected in the controller design.


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