本文選題：水工泄水建筑物　切入點：結(jié)構(gòu)安全　出處：《南昌大學》2014年碩士論文

【摘要】：對水工泄水建筑物進行振動安全評價，即測量出水工泄水建筑物的振動量（位移、速度、加速度）以后，如何判別振動對結(jié)構(gòu)安全的影響，盡管國內(nèi)外諸多學者根據(jù)多年的研究成果和經(jīng)驗積累，試圖總結(jié)歸納針對水工泄水建筑物的安全評價標準，但到目前為止仍沒有形成統(tǒng)一的標準。 本文圍繞水工泄水建筑物的振動安全評價，以三峽左導墻泄流激振實測和某閘墩振動動力測試為工程背景，采用總結(jié)歸納、對比分析、現(xiàn)場實測和數(shù)值模擬相結(jié)合的方法，從工程結(jié)構(gòu)安全和舒適度兩個方面比選出適合水工泄水建筑物的振動安全評價方法，并通過實際工程案例加以驗證。 1、結(jié)構(gòu)安全評價 （1）在對現(xiàn)有的結(jié)構(gòu)安全評價規(guī)范和指南進行研究比選的基礎上，提出水工泄水建筑物結(jié)構(gòu)安全綜合評價法。該方法綜合考慮優(yōu)勢頻率、速度峰值、位移特征值因素，參照GB50868-2013《建筑工程容許振動標準》和建筑物高度的十萬分之一作為“允許振幅”的標準，進行水工泄水建筑物結(jié)構(gòu)安全評價。 （2）采用MATLAB軟件對三峽工程左導墻實測位移數(shù)據(jù)數(shù)據(jù)進行處理，繪制功率譜密度圖并進行模態(tài)分析，并進行了振動安全評價，，明確了評價方法、評價步驟。 2、舒適度評價 （1）將水工泄水建筑物振動的舒適度評價時常用的Meister感覺曲線、GB/T13921-92、BS6841-1987和GB/T13441.1-2007四個舒適度標準進行了詳細的介紹，總結(jié)和比較了各自的適用范圍和評價方法。 （2）根據(jù)水工泄水建筑物流激振動常表現(xiàn)出低頻振動的特點，振動的優(yōu)勢頻率集中在基頻。為使舒適度評價更加合理有效，1Hz為界限確定對應的舒適度評價標準。 3、以信江水利樞紐閘墩泄洪振動和某泄洪閘閘墩泄洪振動原型觀測為例，利用MATLAB、ANSYS軟件,和常用的模態(tài)識別方法，通過進行水工泄水建筑物振動安全評價，驗證評價方法的有效性。
[Abstract]:The safety evaluation on the vibration of hydraulic engineering, vibration measuring hydraulic discharge structure (displacement, velocity, acceleration), how to determine the effect of vibration on the safety of the structure, although many scholars at home and abroad according to the research results and experience of many years of accumulation, trying to summarize the safety evaluation for hydraulic engineering standards. But so far there is no unified standard.
This paper focuses on vibration safety evaluation of hydraulic engineering, in the Three Gorges left guide wall discharge excitation test and a pier vibration test for the engineering background, the summary, comparative analysis, field measurement and numerical simulation method of combining the vibration safety evaluation method from the engineering structure safety and comfort than two choose the suitable hydraulic engineering, and verified by practical engineering case.
1, structural safety evaluation
(1) in the study of selection on the basis of the existing structure safety evaluation standards and guidelines, the comprehensive evaluation of the safety of building structure of water release method. This method takes into account the dominant frequency, peak velocity, displacement characteristic value factors, according to the GB50868-2013< standard construction allowable vibration > and the height of the building as a 1/100000 "allowed amplitude" the standard of hydraulic structure safety evaluation of buildings.
(2) using MATLAB software to process the measured displacement data of the left guide wall of the Three Gorges project, draw the power spectral density map and conduct modal analysis, and carry out the vibration safety assessment, and define the evaluation method and evaluation steps.
2, comfort evaluation
(1) the Meister comfort curves, GB/T13921-92, BS6841-1987 and GB/T13441.1-2007 four comfort standards used for comfort evaluation of hydraulic discharge structures are introduced in detail, and their respective application scopes and evaluation methods are summarized and compared.
(2) according to the characteristics of low frequency vibration, the dominant frequency of vibration is concentrated in the fundamental frequency. According to the vibration induced by logistics, the frequency of vibration is concentrated in the fundamental frequency. In order to make the comfort evaluation more reasonable and effective, 1Hz determines the corresponding comfort evaluation criteria for the boundary.
3, taking the prototype of the floodgate vibration of the Xinjiang water control project as an example, and a flood discharge gate pier flood discharge and vibration prototype observation as an example, the effectiveness of the evaluation method is verified by using MATLAB, ANSYS software and the commonly used modal identification method.

【學位授予單位】：南昌大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TV65;TV312

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