本文選題：高柔結(jié)構(gòu)　切入點(diǎn)：搖擺地震動(dòng)　出處：《武漢理工大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：地震動(dòng)由三個(gè)平動(dòng)分量和三個(gè)轉(zhuǎn)動(dòng)分量共同組成的,在以往的研究中,通常會(huì)忽略地震動(dòng)搖擺分量的地震作用。而實(shí)際上,地震動(dòng)搖擺分量對建筑結(jié)構(gòu)的地震效應(yīng)會(huì)帶來顯著的影響。特別是對于高柔結(jié)構(gòu)這類高度較高、側(cè)向剛度較低的結(jié)構(gòu)體系,在地震動(dòng)水平-搖擺耦合作用下時(shí),搖擺地震動(dòng)不僅會(huì)增大高柔結(jié)構(gòu)體系的動(dòng)力效應(yīng),并且由于搖擺轉(zhuǎn)角位移時(shí)程的影響,導(dǎo)致高柔結(jié)構(gòu)產(chǎn)生一定的基礎(chǔ)傾斜,放大了結(jié)構(gòu)的P-?效應(yīng)。若忽略搖擺地震動(dòng),會(huì)造成嚴(yán)重的后果,因此,對高柔結(jié)構(gòu)在多維地震動(dòng)作用下的地震效應(yīng)研究是非常必要的。本文將對高柔結(jié)構(gòu)在地震動(dòng)水平-搖擺耦合作用下的地震效應(yīng)進(jìn)行了試驗(yàn)和理論研究,探討搖擺地震動(dòng),特別是搖擺轉(zhuǎn)角位移對高柔結(jié)構(gòu)地震效應(yīng)的影響。主要研究內(nèi)容如下:1)基于小波分析獲取地震動(dòng)搖擺分量�；趶�(qiáng)震時(shí)斷層附近地面地震動(dòng)搖擺分量對單擺式地震儀水平和豎向擺造成的響應(yīng)差異性,建立基于小波變換和閾值處理獲取地震動(dòng)搖擺分量的新方法。采用該方法獲取地震動(dòng)搖擺分量,并進(jìn)行振動(dòng)臺試驗(yàn)驗(yàn)證了基于小波分析的地震動(dòng)搖擺分量獲取方法的正確性和精度;2)非線性動(dòng)力方程推導(dǎo)。推導(dǎo)地震動(dòng)水平-搖擺耦合作用下高柔結(jié)構(gòu)的非線性動(dòng)力方程,并將搖擺轉(zhuǎn)角位移產(chǎn)生的非對稱P-?效應(yīng)以一個(gè)等效水平側(cè)向力的形式加在動(dòng)力方程的激勵(lì)項(xiàng)中;3)高柔結(jié)構(gòu)的振動(dòng)臺試驗(yàn)和理論研究。以某電視塔結(jié)構(gòu)為原型,進(jìn)行了地震動(dòng)水平、搖擺和水平-搖擺耦合作用下高柔結(jié)構(gòu)的縮尺模型,并與理論分析結(jié)果進(jìn)行對比,探討搖擺轉(zhuǎn)角位移產(chǎn)生的地震效應(yīng)影響。通過振動(dòng)臺試驗(yàn)和理論分析的結(jié)果對比表明:1)基于小波分析獲取的地震動(dòng)搖擺分量的殘余傾斜位移與實(shí)測的基本吻合,且過濾掉搖擺分量的水平分量傅里葉譜的低頻部分與豎向分量的較為相似;振動(dòng)臺試驗(yàn)驗(yàn)證了基于小波分析獲取地震動(dòng)搖擺分量方法的正確性,且相較于基于傅里葉分析的方法,結(jié)果與實(shí)際情況更加吻合,精度實(shí)現(xiàn)了大幅提高。2)振動(dòng)臺試驗(yàn)結(jié)果與本文推導(dǎo)的動(dòng)力方程理論分析結(jié)果基本吻合,證實(shí)了理論分析的正確性;3)由基礎(chǔ)轉(zhuǎn)角位移產(chǎn)生的附加P-?效應(yīng)不僅會(huì)增大高柔結(jié)構(gòu)的動(dòng)力效應(yīng),并且會(huì)導(dǎo)致高柔結(jié)構(gòu)產(chǎn)生顯著的非對稱位移效應(yīng),從而使得結(jié)構(gòu)的水平位移大幅增加,在實(shí)際的抗震設(shè)計(jì)計(jì)算中,應(yīng)予以重視。
[Abstract]:Ground motion is composed of three translational components and three rotational components. In previous studies, the seismic action of the rocking component of ground motion is usually ignored. The seismic effect of building structure will be affected significantly by the rocking component of ground motion, especially for the high height and low lateral stiffness of the high flexible structure, under the coupling action of horizontal and rocking ground motion, especially for the structural system with high height and low lateral stiffness. Rocking ground motion will not only increase the dynamic effect of the high flexible structure system, but also cause the foundation tilting of the high flexible structure due to the influence of the displacement time history of the rocking angle, and amplify the structure's P--? If the shaking ground motion is ignored, there will be serious consequences, therefore, It is very necessary to study the seismic effect of high flexible structure under the action of multi-dimensional ground motion. In this paper, the seismic effect of the flexible structure under horizontal and rocking coupling of ground motion is studied experimentally and theoretically, and the shaking ground motion is discussed. In particular, the effect of rocking angle displacement on seismic effect of tall and flexible structures. The main research contents are as follows: 1) based on wavelet analysis, the rocking component of ground motion is obtained. Based on the rocking component of ground motion near fault during strong earthquake, the swinging component of ground motion near fault is applied to single pendulum ground. The difference of response caused by horizontal and vertical pendulum of seismograph, A new method based on wavelet transform and threshold processing is established to obtain the rocking component of ground motion, and the method is used to obtain the rocking component of ground motion. The vibration table test verifies the correctness and accuracy of the method for obtaining the rocking component of ground motion based on wavelet analysis. The nonlinear dynamic equation of the flexible structure under horizontal and rocking coupling is derived. And the unsymmetrical P-? The effect is added to the excitation term of the dynamic equation in the form of an equivalent horizontal lateral force. The shaking table test and theoretical study of a flexible structure are carried out. The ground motion level is carried out using a television tower as a prototype. The scale model of the flexible structure under the coupling of rocking and horizontal rocking is compared with the theoretical analysis. The effect of rocking angle displacement on seismic effect is discussed. The results of shaking table test and theoretical analysis show that the residual tilt displacement of the rocking component of ground motion obtained by wavelet analysis is in good agreement with the measured one. The low frequency component of the horizontal component of the rocking component is similar to that of the vertical component, and the method of obtaining the rocking component of the ground motion based on wavelet analysis is verified by the shaking table test. Compared with the method based on Fourier analysis, the results are more consistent with the actual situation, and the precision of shaking table test is greatly improved. 2) the results of shaking table test are in good agreement with the theoretical analysis results of the dynamic equation derived in this paper. It is proved that the theoretical analysis is correct. The effect will not only increase the dynamic effect of the tall flexible structure, but also lead to the significant asymmetric displacement effect of the high flexible structure, which makes the horizontal displacement of the structure increase significantly, which should be paid more attention to in the actual seismic design calculation.
【學(xué)位授予單位】：武漢理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TU311.3

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 周佩佩;巢斯;;關(guān)于地震波轉(zhuǎn)動(dòng)分量的確定方法的研究[J];建筑結(jié)構(gòu);2013年S2期

2 公常清;戴靠山;任曉崧;;隨機(jī)地震動(dòng)搖擺分量對風(fēng)電塔結(jié)構(gòu)地震響應(yīng)影響的分析[J];土木工程學(xué)報(bào);2013年S1期

3 趙伯明;王挺;;高層建筑結(jié)構(gòu)時(shí)程分析的地震波輸入[J];沈陽建筑大學(xué)學(xué)報(bào)(自然科學(xué)版);2010年06期

4 ;Time-frequency response spectrum of rotational ground motion and its application[J];Earthquake Science;2010年01期

5 楊志勇;黃吉鋒;邵弘;;彈性與彈塑性動(dòng)力時(shí)程分析方法中若干問題探討[J];建筑結(jié)構(gòu)學(xué)報(bào);2009年S1期

6 吳琛;周瑞忠;;基于小波變換的結(jié)構(gòu)地震響應(yīng)與能量計(jì)算分析[J];地震工程與工程振動(dòng);2006年06期

7 陸鐵堅(jiān);李芳;余志武;;在地震動(dòng)水平與搖擺分量作用下高層結(jié)構(gòu)隨機(jī)地震反應(yīng)[J];中南大學(xué)學(xué)報(bào)(自然科學(xué)版);2006年03期

8 劉先明,葉繼紅,李愛群;多點(diǎn)輸入反應(yīng)譜法的理論研究[J];土木工程學(xué)報(bào);2005年03期

9 遲世春,林少書;結(jié)構(gòu)動(dòng)力模型試驗(yàn)相似理論及其驗(yàn)證[J];世界地震工程;2004年04期

10 李宏男,孫鴻敏;小波分析在土木工程領(lǐng)域中的應(yīng)用[J];世界地震工程;2003年02期

相關(guān)碩士學(xué)位論文 前2條

1 張勇;水平地震下高橋墩單自由度體系二階效應(yīng)研究[D];重慶大學(xué);2010年

2 蔡宏紅;小波分析方法模擬地震動(dòng)的研究[D];西安建筑科技大學(xué);2008年

，

本文編號：1619364