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Study Of Wind-Resistant Of Tall Building Base On Reliability Theory

Posted on:2003-05-29Degree:DoctorType:Dissertation
Country:ChinaCandidate:N D LuoFull Text:PDF
GTID:1102360065456254Subject:Structural engineering
Abstract/Summary:PDF Full Text Request
The wind-induced vibration of tall (high-rise) building is becoming more and more intense. It is appropriate and effective to use method of reliability to study on the wind-induced vibration property of tall (high-rise) building, because there are more random attributes with constructions and wind loads. Base on reliability theory, random vibration theory and the domestic and international previous research works of the same field, the analysis of wind-induced vibration of tall (high-rise) building and some relevant works are further studied in this thesis. The major contents are summarized as follows:1. The wind speed of reference period is determined by the local primitive data. A method is introduced that determine the wind speed of reference period through short-term wind data such as 3 to 5 years. It provides an evidence for wind-resistant design of the area that lack of long-term wind data.2. The aim of the analysis of wind-induced vibration is to make sure that the construction can work well. According to the dynamic response characters, the statistic parameters of tall (high rise) building under wind loads are deduced and the structure dynamic reliability under a gusty wind is acquired through the theory of extreme values and the normal distribution method. The occurring frequency of wind loads is assumed to obey the Poisson distribution, then the method to calculate the dynamic reliability of structures resisting wind loads in reference period is obtained.3. The essential distinction between structural static and dynamic reliability analysis is emphasized, since the maximum dynamic response is not always corresponding to maximum load in structural dynamic analysis. The structure dynamic reliability of reference period may be different when monthly, yearly and the reference period maximum wind loads are adopted. The conclusion is obtained that the result is almost accurate if yearly maximum wind loads are adopted to calculate the dynamic reliability index.4. The coefficient of wind-induced vibration is a link between the dynamicwind loads and the equivalent static loads and it is a key item in wind-resistant design. The further study on the coefficient of wind-induced vibration is carried out.5. The factors, especially the interval, that affect the statistic mean wind velocity are expatiated. Then the effects on the power spectrum of pulsating wind pressure as well as on the dynamic response of the structure under wind loads are analyzed by means of Monte Carlo Method when the square item of pulsating wind velocity is ignored.6. The structure control system is ah effective method to reduce the wind-induced vibration response of construction and raise the dynamic reliability of structure. Artificial Neural Network (ANN) method is proposed to use in active control system after the analysis of the effective frequency bandwidth of TMD control system. The ability of the active control system is increased because the response of structure is predicted by the ANN. The dynamic reliability index is used to adjudicate the ability of different control system during the study process.The research work is supported by the Special Foundation of Collage Doctoral Subject [98014124] and the National Natural Science Foundation of China [59878008].
Keywords/Search Tags:tall (high-rise) building, wind loads, reliability, statistic interval, control of wind-induced vibration
PDF Full Text Request
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