本文關(guān)鍵詞：豎向不規(guī)則結(jié)構(gòu)基于延性抗震設(shè)計(jì)法的基礎(chǔ)研究　出處：《華南理工大學(xué)》2014年博士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 豎向不規(guī)則 多自由度體系 剪切型結(jié)構(gòu) 彎曲型結(jié)構(gòu) 抗震設(shè)計(jì) 延性折減系數(shù) 阻尼折減系數(shù)

【摘要】：豎向不規(guī)則布置是導(dǎo)致建筑結(jié)構(gòu)地震損傷破壞的主要原因之一，國(guó)內(nèi)外學(xué)者針對(duì)豎向不規(guī)則結(jié)構(gòu)的地震損傷破壞特點(diǎn)、地震反應(yīng)規(guī)律以及抗震設(shè)計(jì)方法開展了廣泛的研究。然而，豎向不規(guī)則結(jié)構(gòu)抗震性能研究是一項(xiàng)十分重要且復(fù)雜的課題，雖然目前的研究已取得很大的進(jìn)展，但隨著建筑形式以及社會(huì)經(jīng)濟(jì)的發(fā)展，研究尚不完善。本文綜合考慮結(jié)構(gòu)豎向不規(guī)則、近斷層速度脈沖地震作用、結(jié)構(gòu)側(cè)移模式等因素，針對(duì)建筑抗震設(shè)計(jì)中急需解決的幾個(gè)問題進(jìn)行了探索性研究。主要工作如下： (1)豎向布置規(guī)則剪切型結(jié)構(gòu)的延性折減系數(shù)(DRF)研究。通過調(diào)整等效單自由度(SDOF)體系DRF,研究多自由度體系(MDOF)的DRF。以剪切型集中質(zhì)量MDOF體系模型為分析對(duì)象，通過非線性動(dòng)力時(shí)程分析，研究MDOF體系因高模態(tài)延性需求集中而影響抗震DRF的規(guī)律。結(jié)果表明：MDOF體系DRF比其相應(yīng)的等效SDOF體系的DRF小,系統(tǒng)位移延性和振動(dòng)周期是影響MDOF的DRF之修正系數(shù)的主要因素。 (2)近斷層速度脈沖地震作用下豎向不規(guī)則結(jié)構(gòu)的抗震需求變化規(guī)律研究。選取8條近斷層速度脈沖地震記錄，通過非線性動(dòng)力時(shí)程分析，研究速度脈沖地震效應(yīng)和結(jié)構(gòu)底層剛度、強(qiáng)度以及兩者組合豎向不規(guī)則的綜合不利情況下，結(jié)構(gòu)的位移、位移延性和能量需求變化規(guī)律及其沿樓層的分布模式。結(jié)果表明：速度脈沖型地震作用下豎向不規(guī)則結(jié)構(gòu)有更大的延性需求；底層強(qiáng)度不規(guī)則比底層強(qiáng)度和剛度組合不規(guī)則對(duì)結(jié)構(gòu)最大層間延性需求的影響大，，底層剛度不規(guī)則時(shí)延性需求則表現(xiàn)出不同規(guī)律；底層豎向不規(guī)則引起底層位移需求和能量需求急劇加大，形成塑性變形和耗能集中的薄弱層，而其它樓層位移和能量需求有減小趨勢(shì)。 (3)剪切型豎向不規(guī)則結(jié)構(gòu)DRF的研究。通過修正參考豎向規(guī)則結(jié)構(gòu)的DRF，研究豎向不規(guī)則結(jié)構(gòu)在速度脈沖強(qiáng)震作用下的DRF。采用集中質(zhì)量剪切型MDOF模型，構(gòu)建了豎向規(guī)則結(jié)構(gòu)的DRF應(yīng)用于豎向不規(guī)則結(jié)構(gòu)時(shí)修正系數(shù)的研究方法，并探討了主要影響因素。結(jié)果表明，豎向不規(guī)則結(jié)構(gòu)的DRF明顯小于參考規(guī)則結(jié)構(gòu)的DRF；修正系數(shù)隨著不規(guī)則比率減小或延性需求增大而減小。通過比較得出，速度脈沖地震作用下修正系數(shù)比相應(yīng)非速度脈沖地震作用下修正系數(shù)值小。 (4)彎曲型與剪切型MDOF體系的抗震DRF的差異比較以及豎向強(qiáng)度不規(guī)則彎曲型結(jié)構(gòu)的DRF研究。以多質(zhì)點(diǎn)系懸臂柱模擬彎曲型結(jié)構(gòu)、抗側(cè)串聯(lián)彈簧系統(tǒng)模擬剪切型結(jié)構(gòu)，研究樓層位移延性和基本振動(dòng)周期對(duì)彎曲型結(jié)構(gòu)DRF的影響，并比較其與剪切型結(jié)構(gòu)DRF的差異。通過修正豎向規(guī)則結(jié)構(gòu)的DRF來研究不規(guī)則彎曲型結(jié)構(gòu)的DRF，并探討樓層數(shù)、延性、不規(guī)則比率和速度脈沖地震效應(yīng)對(duì)修正系數(shù)的影響。結(jié)果表明：彎曲型結(jié)構(gòu)的DRF比剪切型結(jié)構(gòu)的DRF總體上約大40%；樓層數(shù)和延性水平是影響DRF的重要因素；豎向強(qiáng)度不規(guī)則結(jié)構(gòu)的DRF明顯小于其相應(yīng)規(guī)則結(jié)構(gòu)的DRF，修正系數(shù)隨不規(guī)則比率的減小而減小；速度脈沖地震作用工況下的修正系數(shù)比非速度脈沖地震作用工況下的修正系數(shù)小，且速度脈沖地震效應(yīng)與不規(guī)則比率有顯著交互影響。 (5)基于蒙特卡羅模擬分析量化RC框架結(jié)構(gòu)豎向不規(guī)則極限參數(shù)的抗震控制效果。以底層和中間層樓層承載力和剛度不規(guī)則的5層和10層RC框架結(jié)構(gòu)為分析對(duì)象，考慮地震動(dòng)輸入的隨機(jī)性，通過非線性動(dòng)力時(shí)程分析確定結(jié)構(gòu)最大層間位移，并分析其隨豎向不規(guī)則參數(shù)變化的規(guī)律和超越極限狀態(tài)標(biāo)準(zhǔn)的失效概率。結(jié)果表明：承載力和剛度不規(guī)則對(duì)結(jié)構(gòu)最大層間位移的影響較大，最大層間位移隨豎向不規(guī)則系數(shù)的減小而增大，底層不規(guī)則比中間層不規(guī)則的影響大，承載力不規(guī)則比剛度不規(guī)則的影響大；豎向不規(guī)則對(duì)結(jié)構(gòu)超越極限狀態(tài)水準(zhǔn)的失效概率有顯著的影響，失效概率隨豎向不規(guī)則系數(shù)的減小而增大。 (6)地震動(dòng)持時(shí)效應(yīng)對(duì)結(jié)構(gòu)抗震阻尼折減系數(shù)的影響研究。采用簡(jiǎn)諧正弦波和集集地震記錄，基于SDOF體系不同阻尼比水平的位移反應(yīng)譜研究了有效地震動(dòng)持時(shí)對(duì)阻尼折減系數(shù)影響。結(jié)果表明：阻尼折減系數(shù)隨有效地震動(dòng)持時(shí)比和簡(jiǎn)諧激勵(lì)循環(huán)數(shù)的增加而減�。换诜治鼋Y(jié)果的統(tǒng)計(jì)平均值，通過非線性回歸分析給出了考慮地震動(dòng)持時(shí)影響的阻尼折減系數(shù)譜。
[Abstract]:Vertical irregular layout is one of the main causes of earthquake damage of building structure, domestic and foreign scholars on the failure characteristics of vertical irregular structure of earthquake damage, seismic response law and seismic design method has carried out extensive research. However, the vertical irregular structure seismic performance research is a very important and complicated issue, although the research has made great progress, but with the development of architectural forms and social economy, the research is still not perfect. Considering the vertical irregular structure, near fault velocity pulse earthquake, lateral displacement mode and other factors, aiming at some problems need to be solved in the seismic design of buildings was studied. The main work is as follows:
(1) ductility rules of vertical arrangement of shear type structure coefficient (DRF). By adjusting the equivalent single degree of freedom (SDOF) system of DRF, the research of multi degree of freedom system (MDOF) to the DRF. shear lumped mass MDOF system model as the analysis object, the nonlinear dynamic time history analysis, the research of MDOF system for the high modal ductility demand concentrated and influence the seismic regularity of DRF. The results show that the equivalent SDOF system MDOF system DRF than the corresponding DRF system, displacement ductility and vibration period are the main factors that influence the correction coefficient MDOF of DRF.
(2) the near fault pulse under earthquake vertical irregular structure seismic demand changes. A total of 8 near fault velocity pulse seismic records by nonlinear dynamic time history analysis of velocity pulse seismic effect and the underlying structure of the stiffness, strength and the two groups combined adverse situation of vertical irregular structure. The variation of displacement, displacement ductility and energy demand and its distribution pattern along the floor. The results show that the velocity of pulse type earthquake under the action of vertical irregular structure has greater impact ductility demand; the underlying strength and stiffness than the irregular bottom layer strength irregular structure of maximum story ductility demand from the bottom, just the degree of irregular ductility demand showed a different pattern; the bottom vertical irregularity caused by bottom displacement and energy demands increase rapidly, the formation of plastic deformation and energy dissipation concentrated thin The weak layer, and the other floor displacement and energy demand has a decreasing trend.
(3) the research of shear type vertical irregular structure DRF. By modifying the structure of the DRF vertical reference rules, the research of vertical irregular structure in the velocity pulse under strong earthquake DRF. using the lumped mass shear type MDOF model, constructed the DRF application of the vertical rule structure research method of correction coefficient on vertical irregular structure. And the main influence factors were discussed. The results show that the vertical irregular structure of DRF is significantly less than the reference rule structure DRF; correction coefficient decreases with the decrease of ductility or irregular ratio increased demand. Through the comparison, the speed of impulse correction coefficient under earthquake than the corresponding non velocity pulse seismic coefficient is small.
(4) DRF DRF study on difference of seismic bending and shear type MDOF system and the comparison of vertical bending strength irregular structure. The multi particle system simulation of bending of cantilever column type structure, lateral shear type structure simulation series spring system, influence of floor displacement ductility and the fundamental vibration period on the bending type structure of DRF, and compared with the shear type structure of DRF difference. By modifying the structure of the DRF to study the rules of vertical irregular bending type structure of the DRF, and to explore the floor number, ductility, irregular pulse rate and speed of earthquake effect on the impact of the correction coefficient. The results show that the bending type structure DRF shear type structure DRF is generally about 40%; the number of floors and the ductility level is an important factor affecting the strength of DRF; vertical irregular structure DRF is much less than the corresponding rule structure of DRF correction coefficient with irregular ratio decreases with the reduction of The correction coefficient of velocity pulse seismic action is smaller than that of non velocity impulse seismic operation, and the velocity pulse seismic effect has a significant interaction with the irregular ratio.
(5) Monte Carlo simulation analysis of seismic control effects of quantitative RC frame structure of vertical irregular limit parameters based on the bottom and middle floors. The bearing capacity and stiffness of irregular 5 layer and 10 layer RC frame structure as the research object, considering the randomness of earthquake ground motions, determined by nonlinear dynamic time history analysis the maximum displacement between layers, and the analysis with vertical irregular parameter changes and the failure probability exceeding limit state standards. The results show that the influence of bearing capacity and stiffness of the irregular structure of the maximum drift greatly, reduce the maximum interlayer displacement with vertical irregular coefficient increases, irregular bottom effect than the middle layer of irregular, irregular bearing capacity than the effect of stiffness irregular; vertical irregularity has a significant effect on the failure probability of structure beyond the limit state level, the failure probability of the vertical irregular Then the coefficient decreases and increases.
(6) to study the seismic effects to the seismic response time structure damping reduction factor. The harmonic sine wave and the Chi Chi earthquake records, SDOF system with different damping ratio, displacement response spectra of the effective level of ground motion duration on damping reduction factor based on impact. The results show that the damping coefficient decreases with the increase of effective seismic reduction when the ratio and the number of cycles of harmonic excitation decreases; the results of statistical analysis based on average, by nonlinear regression analysis is presented considering damping reduction factor spectra reduction effects of ground motion duration.

【學(xué)位授予單位】：華南理工大學(xué)
【學(xué)位級(jí)別】：博士
【學(xué)位授予年份】：2014
【分類號(hào)】：TU352.11

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 楊迪雄,李剛,程耿東;近斷層脈沖型地震動(dòng)作用下隔震結(jié)構(gòu)地震反應(yīng)分析[J];地震工程與工程振動(dòng);2005年02期

2 王全鳳,王凌云;不規(guī)則框架-剪力墻結(jié)構(gòu)的地震反應(yīng)[J];地震工程與工程振動(dòng);2005年04期

3 翟長(zhǎng)海;謝禮立;;抗震規(guī)范應(yīng)用強(qiáng)度折減系數(shù)的現(xiàn)狀及分析[J];地震工程與工程振動(dòng);2006年02期

4 沈朝勇;吳波;周福霖;黃襄云;羅學(xué)海;陳建秋;金建敏;;高層錯(cuò)位轉(zhuǎn)換結(jié)構(gòu)的試驗(yàn)研究和理論分析[J];地震工程與工程振動(dòng);2006年02期

5 李英民;韓軍;田啟祥;陳偉賢;趙盛位;;填充墻對(duì)框架結(jié)構(gòu)抗震性能的影響[J];地震工程與工程振動(dòng);2009年03期

6 翟長(zhǎng)海;謝禮立;;多自由度體系效應(yīng)對(duì)強(qiáng)度折減系數(shù)的影響[J];工程力學(xué);2006年11期

7 趙鳳新;韋韜;張郁山;;近斷層速度脈沖對(duì)鋼筋混凝土框架結(jié)構(gòu)地震反應(yīng)的影響[J];工程力學(xué);2008年10期

8 盧明奇;田玉基;楊慶山;;近斷層地震作用下高層建筑結(jié)構(gòu)地震響應(yīng)分析[J];哈爾濱工業(yè)大學(xué)學(xué)報(bào);2007年02期

9 翟長(zhǎng)海;謝禮立;;結(jié)構(gòu)抗震設(shè)計(jì)中的強(qiáng)度折減系數(shù)研究進(jìn)展[J];哈爾濱工業(yè)大學(xué)學(xué)報(bào);2007年08期

10 錢稼茹,戴夫聰,趙作周,趙毅強(qiáng),程懋,柯長(zhǎng)華,李瑩,佟曉鷗;北京金地中心不規(guī)則框架模型抗震性能試驗(yàn)研究[J];建筑結(jié)構(gòu)學(xué)報(bào);2005年05期

本文編號(hào)：1420130