基于地震易損性的防屈曲支撐對不規(guī)則超限高層結(jié)構(gòu)抗震性能影響研究
發(fā)布時間：2018-10-12 14:05
【摘要】：隨著經(jīng)濟(jì)的高度發(fā)展,國內(nèi)出現(xiàn)了越來越多的建筑體型復(fù)雜、平面布置不規(guī)則、功能多樣化的不規(guī)則超限高層建筑,目前大量的震害統(tǒng)計與研究分析表明,無論是平面還是豎向不規(guī)則均容易誘發(fā)結(jié)構(gòu)破壞或倒塌,對建筑結(jié)構(gòu)的抗震性能產(chǎn)生嚴(yán)重不利影響。顯然,如何保證不規(guī)則超限高層結(jié)構(gòu)的抗震性能成為結(jié)構(gòu)抗震研究的關(guān)鍵問題,而采用防屈曲支撐(BRB)耗能減震技術(shù)提高結(jié)構(gòu)的抗震安全性是解決問題的有效方法。利用BRB裝置控制結(jié)構(gòu)的損傷是積極主動的抗震防災(zāi)技術(shù),但是BRB究竟能對不規(guī)則超限高層結(jié)構(gòu)提供多大安全儲備尚不明確,因此揭示BRB性能參數(shù)(初始剛度、屈服強(qiáng)度及屈服后剛度比)與不規(guī)則超限高層結(jié)構(gòu)抗震性能之間關(guān)系,建立BRB性能參數(shù)與結(jié)構(gòu)抗震可靠度之間關(guān)系對于控制不規(guī)則超限高層結(jié)構(gòu)損傷至關(guān)重要。本文以某不規(guī)則超限高層框剪結(jié)構(gòu)為研究對象,采用靜力彈塑性分析、非線性動力時程分析及地震易損性等分析方法研究BRB對結(jié)構(gòu)抗側(cè)力性能、結(jié)構(gòu)地震響應(yīng)、結(jié)構(gòu)損傷程度及易損性評估結(jié)果的影響,同時討論BRB性能參數(shù)對結(jié)構(gòu)地震易損性評估結(jié)果的影響,并揭示BRB主要性能參數(shù)與不規(guī)則超限高層結(jié)構(gòu)抗震性能之間關(guān)系,建立BRB性能參數(shù)與結(jié)構(gòu)地震易損性之間的函數(shù)關(guān)系。本文主要研究內(nèi)容及結(jié)論如下：(1)鑒于地震動強(qiáng)度參數(shù)與結(jié)構(gòu)參數(shù)是影響正確評估復(fù)雜高層結(jié)構(gòu)抗震性能的關(guān)鍵參數(shù),本文以某不規(guī)則超限高層框剪結(jié)構(gòu)為研究對象,考慮結(jié)構(gòu)參數(shù)對復(fù)雜高層結(jié)構(gòu)地震動強(qiáng)度參數(shù)敏感性分析結(jié)果的影響,研究BRB對結(jié)構(gòu)地震動強(qiáng)度參數(shù)敏感性評估結(jié)果的影響,并選取較能反映結(jié)構(gòu)地震響應(yīng)的地震動強(qiáng)度參數(shù)。分析結(jié)果表明,BRB對不規(guī)則超限高層框剪結(jié)構(gòu)地震動強(qiáng)度參數(shù)敏感性評估結(jié)果的影響明顯,導(dǎo)致地震動強(qiáng)度參數(shù)敏感性評估結(jié)果產(chǎn)生較大的離散性；地面峰值速度PGV對本文分析采用的不規(guī)則超限高層框剪結(jié)構(gòu)地震需求影響程度最高,適合作為結(jié)構(gòu)地震易損性評估的分析參數(shù)。(2)為致力于更加全面詳細(xì)的了解BRB對不規(guī)則超限高層框剪結(jié)構(gòu)抗震性能的影響,本文基于靜力彈塑性、非線性動力時程及地震易損性等分析方法,從結(jié)構(gòu)抗側(cè)力性能、結(jié)構(gòu)動力響應(yīng)及結(jié)構(gòu)地震破壞超越概率等方面研究BRB對結(jié)構(gòu)抗震性能的影響。結(jié)構(gòu)動力特性分析結(jié)果表明防屈曲支撐能夠提高結(jié)構(gòu)整體剛度,減小結(jié)構(gòu)的自振周期及扭轉(zhuǎn)效應(yīng)；靜力彈塑性分析結(jié)果表明BRB能夠提高結(jié)構(gòu)抗側(cè)剛度、承載力及延性；非線性動力時程分析結(jié)果表明BRB能夠為結(jié)構(gòu)提供一定剛度,并能通過塑性變形耗散大量地震能量,使得結(jié)構(gòu)在地震作用下的頂點加速度及基底剪力增大,頂點位移、整體塑性滯回耗能及最大層間位移角減小,同時結(jié)構(gòu)剪力墻和柱的損傷程度及損傷范圍均大幅減��；地震易損性分析結(jié)果表明BRB能夠有效減小結(jié)構(gòu)地震易損性超越概率,但減小程度隨著地震動強(qiáng)度的增大而逐漸減小。與地震動強(qiáng)度PGV相比,以PGA為地震動強(qiáng)度參數(shù)指標(biāo)進(jìn)行結(jié)構(gòu)地震易損性分析時,會高估不規(guī)則超限高層框剪結(jié)構(gòu)超越不同破壞狀態(tài)的失效概率,低估防屈曲支撐對不規(guī)則超限高層框剪結(jié)構(gòu)地震易損性的影響。(3)本文基于地震易損性分析方法,分別擬合BRB性能參數(shù)與不規(guī)則超限高層結(jié)構(gòu)地震需求(最大層間位移角)之間關(guān)系,建立并驗證BRB性能參數(shù)與結(jié)構(gòu)地震易損性之間的關(guān)系,同時研究BRB性能參數(shù)對不規(guī)則超限高層框剪結(jié)構(gòu)地震易損性的影響,并對比分析其性能參數(shù)對結(jié)構(gòu)地震易損性影響程度。分析結(jié)果表明,隨著BRB抗側(cè)剛度比、屈服強(qiáng)度及屈服后剛度比逐漸增大,不規(guī)則超限高層框剪結(jié)構(gòu)地震易損性超越概率均逐漸減小,但減小程度卻逐漸減緩,趨于平穩(wěn)。根據(jù)不同BRB性能參數(shù)的結(jié)構(gòu)地震易損性對比結(jié)果可知, BRB抗側(cè)剛度比對結(jié)構(gòu)地震易損性的影響程度最大,屈服強(qiáng)度的影響程度其次,而屈服后剛度比的影響最小,可忽略不計,因此本文建議只選取BRB抗側(cè)剛度比及屈服強(qiáng)度,建立BRB性能參數(shù)與結(jié)構(gòu)地震易損性之間的關(guān)系,評判BRB性能參數(shù)對結(jié)構(gòu)地震易損性的影響。
[Abstract]:With the development of economy, there are more and more complex buildings, irregular layout and diversified functions. Neither the plane nor the vertical irregularity can induce structural damage or collapse, which has a serious adverse effect on the anti-seismic performance of the building structure. Obviously, how to ensure that the anti-seismic performance of the irregular overrun high-rise structure becomes the key problem of structural seismic research, and the anti-buckling support (BRB) energy-consuming shock-absorbing technology is adopted to improve the seismic safety of the structure as an effective way to solve the problem. The damage of BRB device control structure is an active anti-seismic disaster prevention technology, but it is not clear whether the BRB can provide multi-large security reserve for irregular overrun high-rise structure, thus revealing the BRB performance parameter (initial stiffness, The relationship between yield strength and post-yield stiffness ratio and anti-seismic performance of irregular out-of-limit high-rise structures is important to control the damage of irregular overrun high-rise structures. In this paper, the effects of BRB on structure anti-lateral force performance, structural seismic response, structural damage degree and the evaluation results are studied by means of static elastic-plastic analysis, nonlinear dynamic time-path analysis and seismic data analysis. At the same time, the influence of the BRB performance parameters on the evaluation results of the structural seismic data is discussed, and the relationship between the main performance parameters of the BRB and the seismic performance of the irregular overrun high-rise structures is revealed, and the function relation between the BRB performance parameters and the structural seismic data is established. The main contents and conclusions of this paper are as follows: (1) In view of the influence of ground motion intensity parameter and structural parameter is the key parameter to evaluate the seismic performance of complex high-rise structure correctly, this paper studies the structure of an irregular out-of-limit high-rise frame as the research object. Considering the influence of structural parameters on the sensitivity analysis results of vibration intensity parameters of complex high-rise structures, the influence of BRB on the sensitivity evaluation results of structural vibration intensity parameters is studied, and the ground vibration intensity parameters which can reflect the structural seismic response are selected. The results show that the influence of BRB on the sensitivity evaluation results of the vibration intensity parameters of irregular over-limit high-rise frame shear structures is obvious, which results in greater discreteness of the sensitivity evaluation results of ground vibration intensity parameters. The ground peak velocity PGV has the highest impact degree on the seismic demand of the irregular out-of-limit high-rise frame shear structure adopted in this paper, and is suitable to be used as the analysis parameter of the structural seismic assessment. (2) For more comprehensive and detailed understanding of the influence of BRB on the seismic behavior of irregular overrun high-rise frame shear structures, based on the analysis methods of static elasto-plastic, nonlinear dynamic time and seismic analysis, the structure anti-lateral force performance is obtained. The influence of BRB on seismic performance of structure is studied in terms of structural dynamic response and structural earthquake damage exceeding probability. The structural dynamic characteristic analysis results show that the anti-buckling support can improve the overall rigidity of the structure, reduce the self-vibration period and the torsion effect of the structure, and the static-plastic analysis results show that the BRB can improve the structure anti-side rigidity, bearing capacity and ductility; The nonlinear dynamic time-path analysis results show that the BRB can provide a certain rigidity for the structure, and can dissipate a great amount of seismic energy through plastic deformation, so that the acceleration of the vertex under the action of the earthquake and the increase of the shear of the substrate, the displacement of the vertex, The total plastic hysteresis energy consumption and the maximum inter-layer displacement angle are reduced, meanwhile, the damage degree and damage range of the structural shear wall and the column are greatly reduced, and the analysis result of the seismic data analysis result shows that the BRB can effectively reduce the overstepping probability of the structure earthquake, but the degree of decrease gradually decreases as the ground vibration strength increases. Compared with the ground vibration intensity PGV, when the structural seismic data analysis is carried out with the PGA as the ground vibration intensity parameter index, the failure probability of the irregular overrun high-rise frame shear structure to exceed the different failure states is estimated, The influence of anti-buckling support on the seismic effect of irregular overrun high-rise frame shear structures is underestimated. (3) Based on the seismic analysis method, the relationship between the BRB performance parameters and the seismic demand of irregular over-limit high-rise structures (maximum inter-layer displacement angle) is fitted, and the relationship between the BRB performance parameters and the structural seismic data is established and verified. At the same time, the influence of the BRB performance parameters on the seismic response of the irregular overrun high-rise frame shear structure is studied, and the influence degree of its performance parameters on the structural seismic response is analyzed. The results show that with the BRB anti-side stiffness ratio, the yield strength and the yield post-yield stiffness ratio gradually increase, the probability of the seismic response of the irregular out-of-limit high-rise frame shear structure decreases gradually, but the degree of decrease is gradually slowed down and the stress is stable. According to different BRB performance parameters, it can be found that the impact degree of BRB anti-side stiffness ratio is the largest and the yield strength is the lowest, and the influence of the yield strength is the least, and it can be neglected. Therefore, it is suggested to select only BRB anti-side stiffness ratio and yield strength, establish the relationship between BRB performance parameters and structural seismic data, and judge the influence of BRB performance parameters on structural seismic data.
【學(xué)位授予單位】：廣州大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TU973.31
本文編號：2266400
[Abstract]:With the development of economy, there are more and more complex buildings, irregular layout and diversified functions. Neither the plane nor the vertical irregularity can induce structural damage or collapse, which has a serious adverse effect on the anti-seismic performance of the building structure. Obviously, how to ensure that the anti-seismic performance of the irregular overrun high-rise structure becomes the key problem of structural seismic research, and the anti-buckling support (BRB) energy-consuming shock-absorbing technology is adopted to improve the seismic safety of the structure as an effective way to solve the problem. The damage of BRB device control structure is an active anti-seismic disaster prevention technology, but it is not clear whether the BRB can provide multi-large security reserve for irregular overrun high-rise structure, thus revealing the BRB performance parameter (initial stiffness, The relationship between yield strength and post-yield stiffness ratio and anti-seismic performance of irregular out-of-limit high-rise structures is important to control the damage of irregular overrun high-rise structures. In this paper, the effects of BRB on structure anti-lateral force performance, structural seismic response, structural damage degree and the evaluation results are studied by means of static elastic-plastic analysis, nonlinear dynamic time-path analysis and seismic data analysis. At the same time, the influence of the BRB performance parameters on the evaluation results of the structural seismic data is discussed, and the relationship between the main performance parameters of the BRB and the seismic performance of the irregular overrun high-rise structures is revealed, and the function relation between the BRB performance parameters and the structural seismic data is established. The main contents and conclusions of this paper are as follows: (1) In view of the influence of ground motion intensity parameter and structural parameter is the key parameter to evaluate the seismic performance of complex high-rise structure correctly, this paper studies the structure of an irregular out-of-limit high-rise frame as the research object. Considering the influence of structural parameters on the sensitivity analysis results of vibration intensity parameters of complex high-rise structures, the influence of BRB on the sensitivity evaluation results of structural vibration intensity parameters is studied, and the ground vibration intensity parameters which can reflect the structural seismic response are selected. The results show that the influence of BRB on the sensitivity evaluation results of the vibration intensity parameters of irregular over-limit high-rise frame shear structures is obvious, which results in greater discreteness of the sensitivity evaluation results of ground vibration intensity parameters. The ground peak velocity PGV has the highest impact degree on the seismic demand of the irregular out-of-limit high-rise frame shear structure adopted in this paper, and is suitable to be used as the analysis parameter of the structural seismic assessment. (2) For more comprehensive and detailed understanding of the influence of BRB on the seismic behavior of irregular overrun high-rise frame shear structures, based on the analysis methods of static elasto-plastic, nonlinear dynamic time and seismic analysis, the structure anti-lateral force performance is obtained. The influence of BRB on seismic performance of structure is studied in terms of structural dynamic response and structural earthquake damage exceeding probability. The structural dynamic characteristic analysis results show that the anti-buckling support can improve the overall rigidity of the structure, reduce the self-vibration period and the torsion effect of the structure, and the static-plastic analysis results show that the BRB can improve the structure anti-side rigidity, bearing capacity and ductility; The nonlinear dynamic time-path analysis results show that the BRB can provide a certain rigidity for the structure, and can dissipate a great amount of seismic energy through plastic deformation, so that the acceleration of the vertex under the action of the earthquake and the increase of the shear of the substrate, the displacement of the vertex, The total plastic hysteresis energy consumption and the maximum inter-layer displacement angle are reduced, meanwhile, the damage degree and damage range of the structural shear wall and the column are greatly reduced, and the analysis result of the seismic data analysis result shows that the BRB can effectively reduce the overstepping probability of the structure earthquake, but the degree of decrease gradually decreases as the ground vibration strength increases. Compared with the ground vibration intensity PGV, when the structural seismic data analysis is carried out with the PGA as the ground vibration intensity parameter index, the failure probability of the irregular overrun high-rise frame shear structure to exceed the different failure states is estimated, The influence of anti-buckling support on the seismic effect of irregular overrun high-rise frame shear structures is underestimated. (3) Based on the seismic analysis method, the relationship between the BRB performance parameters and the seismic demand of irregular over-limit high-rise structures (maximum inter-layer displacement angle) is fitted, and the relationship between the BRB performance parameters and the structural seismic data is established and verified. At the same time, the influence of the BRB performance parameters on the seismic response of the irregular overrun high-rise frame shear structure is studied, and the influence degree of its performance parameters on the structural seismic response is analyzed. The results show that with the BRB anti-side stiffness ratio, the yield strength and the yield post-yield stiffness ratio gradually increase, the probability of the seismic response of the irregular out-of-limit high-rise frame shear structure decreases gradually, but the degree of decrease is gradually slowed down and the stress is stable. According to different BRB performance parameters, it can be found that the impact degree of BRB anti-side stiffness ratio is the largest and the yield strength is the lowest, and the influence of the yield strength is the least, and it can be neglected. Therefore, it is suggested to select only BRB anti-side stiffness ratio and yield strength, establish the relationship between BRB performance parameters and structural seismic data, and judge the influence of BRB performance parameters on structural seismic data.
【學(xué)位授予單位】：廣州大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TU973.31
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