Typhoon Effects on the Center in Hong Kong
Typhoon effects on the Center in Hong Kong
Abstract: This paper presents selected results of wind characteristics and structural responses measured from the Center (350 m high, 79 floors) in Hong Kong, during the passages of three typhoons. The field data such as wind speed, wind direction and acceleration responses, etc., were continuously measured from the super-tall buildings during the typhoons. The simultaneously measured wind-induced acceleration was adopted to evaluate the dynamic characteristic and wind effect on this super tall building. The damping ratio with amplitude-dependent behavior was found by the random decrement method, and the serviceability performance level for different return period was estimated for this tall building. Furthermore, the full-scale measurements were compared with wind tunnel results to evaluate the accuracy of the model test results and the adequacy of the techniques used in the wind tunnel tests. The research output is expected to be of considerable interest and practical use to professionals and researchers involved in the design of super-tall buildings.
Keywords: Wind effect; Tall building; Field measurements; Wind tunnel test;
1. Introduction
In the present day we are experiencing an unprecedented level of activity in the design and construction of super-tall buildings. Many super-tall buildings (building height >300 m) have been or are being built throughout the world. As a consequence, the sensitivity of modern tall buildings to dynamic excitation by wind has increased. This has resulted in a greater emphasis on understanding the structural behavior of modern tall buildings under strong wind actions.
Although there have been many advances in wind tunnel testing and numerical simulation techniques for investigating wind effects on buildings and structures, there are still many critical phenomena which can only be investigated by full-scale experiments. With the development of data acquisition techniques
Abstract: This paper presents selected results of wind characteristics and structural responses measured from the Center (350 m high, 79 floors) in Hong Kong, during the passages of three typhoons. The field data such as wind speed, wind direction and acceleration responses, etc., were continuously measured from the super-tall buildings during the typhoons. The simultaneously measured wind-induced acceleration was adopted to evaluate the dynamic characteristic and wind effect on this super tall building. The damping ratio with amplitude-dependent behavior was found by the random decrement method, and the serviceability performance level for different return period was estimated for this tall building. Furthermore, the full-scale measurements were compared with wind tunnel results to evaluate the accuracy of the model test results and the adequacy of the techniques used in the wind tunnel tests. The research output is expected to be of considerable interest and practical use to professionals and researchers involved in the design of super-tall buildings.
Keywords: Wind effect; Tall building; Field measurements; Wind tunnel test;
1. Introduction
In the present day we are experiencing an unprecedented level of activity in the design and construction of super-tall buildings. Many super-tall buildings (building height >300 m) have been or are being built throughout the world. As a consequence, the sensitivity of modern tall buildings to dynamic excitation by wind has increased. This has resulted in a greater emphasis on understanding the structural behavior of modern tall buildings under strong wind actions.
Although there have been many advances in wind tunnel testing and numerical simulation techniques for investigating wind effects on buildings and structures, there are still many critical phenomena which can only be investigated by full-scale experiments. With the development of data acquisition techniques
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