發(fā)布時(shí)間：2018-04-03 08:53

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

【摘要】：對(duì)水工泄水建筑物進(jìn)行振動(dòng)安全評(píng)價(jià)，即測(cè)量出水工泄水建筑物的振動(dòng)量（位移、速度、加速度）以后，如何判別振動(dòng)對(duì)結(jié)構(gòu)安全的影響，盡管國(guó)內(nèi)外諸多學(xué)者根據(jù)多年的研究成果和經(jīng)驗(yàn)積累，試圖總結(jié)歸納針對(duì)水工泄水建筑物的安全評(píng)價(jià)標(biāo)準(zhǔn)，但到目前為止仍沒有形成統(tǒng)一的標(biāo)準(zhǔn)。 本文圍繞水工泄水建筑物的振動(dòng)安全評(píng)價(jià)，以三峽左導(dǎo)墻泄流激振實(shí)測(cè)和某閘墩振動(dòng)動(dòng)力測(cè)試為工程背景，采用總結(jié)歸納、對(duì)比分析、現(xiàn)場(chǎng)實(shí)測(cè)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(gè)方面比選出適合水工泄水建筑物的振動(dòng)安全評(píng)價(jià)方法，并通過實(shí)際工程案例加以驗(yàn)證。 1、結(jié)構(gòu)安全評(píng)價(jià) （1）在對(duì)現(xiàn)有的結(jié)構(gòu)安全評(píng)價(jià)規(guī)范和指南進(jìn)行研究比選的基礎(chǔ)上，提出水工泄水建筑物結(jié)構(gòu)安全綜合評(píng)價(jià)法。該方法綜合考慮優(yōu)勢(shì)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(dòng)標(biāo)準(zhǔn)》和建筑物高度的十萬分之一作為“允許振幅”的標(biāo)準(zhǔn)，進(jìn)行水工泄水建筑物結(jié)構(gòu)安全評(píng)價(jià)。 （2）采用MATLAB軟件對(duì)三峽工程左導(dǎo)墻實(shí)測(cè)位移數(shù)據(jù)數(shù)據(jù)進(jìn)行處理，繪制功率譜密度圖并進(jìn)行模態(tài)分析，并進(jìn)行了振動(dòng)安全評(píng)價(jià)，，明確了評(píng)價(jià)方法、評(píng)價(jià)步驟。 2、舒適度評(píng)價(jià) （1）將水工泄水建筑物振動(dòng)的舒適度評(píng)價(jià)時(shí)常用的Meister感覺曲線、GB/T13921-92、BS6841-1987和GB/T13441.1-2007四個(gè)舒適度標(biāo)準(zhǔn)進(jìn)行了詳細(xì)的介紹，總結(jié)和比較了各自的適用范圍和評(píng)價(jià)方法。 （2）根據(jù)水工泄水建筑物流激振動(dòng)常表現(xiàn)出低頻振動(dòng)的特點(diǎn)，振動(dòng)的優(yōu)勢(shì)頻率集中在基頻。為使舒適度評(píng)價(jià)更加合理有效，1Hz為界限確定對(duì)應(yīng)的舒適度評(píng)價(jià)標(biāo)準(zhǔn)。 3、以信江水利樞紐閘墩泄洪振動(dòng)和某泄洪閘閘墩泄洪振動(dòng)原型觀測(cè)為例，利用MATLAB、ANSYS軟件,和常用的模態(tài)識(shí)別方法，通過進(jìn)行水工泄水建筑物振動(dòng)安全評(píng)價(jià)，驗(yàn)證評(píng)價(jià)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(xué)位授予單位】：南昌大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TV65;TV312

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本文編號(hào)：1704497