增设减隔震装置的高层建筑抗风性能研究
发布时间：2018-07-31 09:01
【摘要】：随着我国的经济水平的发展和建筑建造工艺的技术革新,高层建筑大量出现在各个一线、二线城市中,对于新型现代城市的建设也起着举足轻重的意义。而风荷载是此类高层建筑的主要荷载控制因素之一,在风荷载作用下可使结构产生抖动,振动等现象。致使结构产生较大的残余变形和较大的裂缝、建筑物构件产生疲劳破坏、人体感觉不适等影响。本文针对高层建筑承受的风荷载,利用AR法编制了MATLAB计算程序,得到风荷载时程曲线,并通过ANSYS软件数值模拟对高层隔震建筑和增设阻尼器的高层隔震建筑进行抗风性能分析,研究隔震支座的抗风效果、隔震建筑的风振响应、风振响应参数,以及增设阻尼器的隔震建筑风振响应及风振响应参数和阻尼器的布置方案。主要工作和成果如下:(1)选取了Davenport风速功率谱,并采用AR法编制了MATLAB计算程序,进而获取结构指定点的风速时程曲线、风压时程曲线以及风载时程曲线。并将得到的风荷载时程曲线通过APDL语言将风载导入ANSYS软件进行时程计算,给出动力时程计算的计算步骤和稳定条件。(2)开展对隔震高层建筑的抗风性能研究,分别对选取的隔震支座进行抗震和抗风性能分析,研究表明在地震波作用下结构加速度峰值平均折减超过40%,说明选取支座的隔震效果良好;建筑设置隔震支座后,在风荷载的作用下,结构位移响应明显增大,加速度响应略有减小,说明风荷载作用下,隔震支座起到的抗风效果并不明显。(3)改变建筑结构的窗裙梁刚度、柱距、阻尼比和隔震支座阻尼,并对上述不同结构模型进行风振响应分析,结果表明:增大窗裙梁刚度可以降低结构的位移和加速度响应,但这不是一种较为经济的措施;增大结构的阻尼比可以在一定程度上改善结构的风振响应;增大隔震支座阻尼比并不能降低结构的风振响应。(4)设置阻尼器后结构的位移响应、加速度响应和层间变形明显降低。说明设置阻尼器可以较好的控制隔震建筑的风振响应;分析了不同窗裙梁刚度、不同阻尼系数和斜撑刚度以及不同阻尼器布置方案下结构的风振响应,分析表明:增大窗裙梁高度对增设阻尼器的隔震建筑的风振响应具有一定的改善作用;斜撑刚度以及阻尼器系数对结构风振响应的控制并不是越大越好,如何优化参数的取值需要进一步研究;不同阻尼器布置方案对结构风振响应的控制有明显的差别,但通常遵循阻尼器数量越多控制效果越好的规律。
[Abstract]:With the development of our country's economic level and the technological innovation of building construction technology, high-rise buildings appear in a large number of first-line, second-tier cities, which also play an important role in the construction of new modern cities. Wind load is one of the main load control factors in this kind of high-rise building. Under the action of wind load, the vibration and vibration of the structure can be caused. It results in large residual deformation and large cracks, fatigue damage of building members, and human body discomfort and so on. In this paper, according to the wind load of high-rise building, the MATLAB program is compiled by AR method, and the time-history curve of wind load is obtained. The anti-wind performance of high-rise isolated building and high-rise isolated building with dampers are analyzed by ANSYS software numerical simulation. The wind-resistant effect of isolation support, the wind-induced response of isolated building, the wind-induced response parameters, the wind-induced vibration response of isolated building with dampers and the layout of dampers are studied. The main work and results are as follows: (1) the Davenport wind speed power spectrum is selected, and the MATLAB calculation program is compiled by AR method, and then the wind speed time history curve, wind pressure time history curve and wind load time history curve are obtained. The wind load time history curve is introduced into the ANSYS software through APDL language for time history calculation, and the calculation steps and stability conditions of dynamic time history calculation are given. (2) the wind resistance performance of isolated high-rise building is studied. The seismic and wind-resistant performances of the selected isolation bearings are analyzed respectively. The results show that the peak acceleration of the structure decreases by an average of more than 40 points under the action of seismic waves, which indicates that the isolation effect of the selected bearings is good. Under the action of wind load, the displacement response of the structure increases obviously, and the acceleration response decreases slightly, which indicates that the wind resistance effect of the isolation support is not obvious under the wind load. (3) changing the stiffness of the window skirt beam and the column distance of the building structure, The damping ratio and the damping of the isolation support are analyzed. The results show that increasing the stiffness of the window skirt beam can reduce the displacement and acceleration response of the structure, but this is not an economic measure. Increasing the damping ratio of the structure can improve the wind-induced vibration response of the structure to some extent, increase the damping ratio of the isolation support can not reduce the wind-induced vibration response of the structure. (4) the displacement response of the structure with dampers, the acceleration response and the interstory deformation are obviously reduced. The results show that dampers can better control the wind-induced vibration response of isolated buildings, and the wind-induced vibration responses of different window skirt beams, different damping coefficients and slanting brace stiffness, and different dampers arrangement schemes are analyzed. The analysis shows that increasing the height of the window skirt beam can improve the wind-induced vibration response of the isolated building with additional dampers, and the control of the inclined brace stiffness and the damper coefficient on the wind-induced vibration response of the structure is not as good as the bigger the damper is. How to optimize the parameters needs further study; the control of wind-induced vibration response of different dampers is obviously different, but usually the more dampers the better the control effect.
【学位授予单位】：南昌航空大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU973.32
本文编号：2155086
[Abstract]:With the development of our country's economic level and the technological innovation of building construction technology, high-rise buildings appear in a large number of first-line, second-tier cities, which also play an important role in the construction of new modern cities. Wind load is one of the main load control factors in this kind of high-rise building. Under the action of wind load, the vibration and vibration of the structure can be caused. It results in large residual deformation and large cracks, fatigue damage of building members, and human body discomfort and so on. In this paper, according to the wind load of high-rise building, the MATLAB program is compiled by AR method, and the time-history curve of wind load is obtained. The anti-wind performance of high-rise isolated building and high-rise isolated building with dampers are analyzed by ANSYS software numerical simulation. The wind-resistant effect of isolation support, the wind-induced response of isolated building, the wind-induced response parameters, the wind-induced vibration response of isolated building with dampers and the layout of dampers are studied. The main work and results are as follows: (1) the Davenport wind speed power spectrum is selected, and the MATLAB calculation program is compiled by AR method, and then the wind speed time history curve, wind pressure time history curve and wind load time history curve are obtained. The wind load time history curve is introduced into the ANSYS software through APDL language for time history calculation, and the calculation steps and stability conditions of dynamic time history calculation are given. (2) the wind resistance performance of isolated high-rise building is studied. The seismic and wind-resistant performances of the selected isolation bearings are analyzed respectively. The results show that the peak acceleration of the structure decreases by an average of more than 40 points under the action of seismic waves, which indicates that the isolation effect of the selected bearings is good. Under the action of wind load, the displacement response of the structure increases obviously, and the acceleration response decreases slightly, which indicates that the wind resistance effect of the isolation support is not obvious under the wind load. (3) changing the stiffness of the window skirt beam and the column distance of the building structure, The damping ratio and the damping of the isolation support are analyzed. The results show that increasing the stiffness of the window skirt beam can reduce the displacement and acceleration response of the structure, but this is not an economic measure. Increasing the damping ratio of the structure can improve the wind-induced vibration response of the structure to some extent, increase the damping ratio of the isolation support can not reduce the wind-induced vibration response of the structure. (4) the displacement response of the structure with dampers, the acceleration response and the interstory deformation are obviously reduced. The results show that dampers can better control the wind-induced vibration response of isolated buildings, and the wind-induced vibration responses of different window skirt beams, different damping coefficients and slanting brace stiffness, and different dampers arrangement schemes are analyzed. The analysis shows that increasing the height of the window skirt beam can improve the wind-induced vibration response of the isolated building with additional dampers, and the control of the inclined brace stiffness and the damper coefficient on the wind-induced vibration response of the structure is not as good as the bigger the damper is. How to optimize the parameters needs further study; the control of wind-induced vibration response of different dampers is obviously different, but usually the more dampers the better the control effect.
【学位授予单位】：南昌航空大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU973.32
【参考文献】
相关期刊论文 前10条
1 周伯昌;;谈高层建筑结构体系[J];工程建设与设计;2016年02期
2 彭刚;汪新;;线性滤波法风速模拟及模型阶数确定[J];广东工业大学学报;2010年02期
3 申建红;李春祥;;强风作用下超高层建筑风场特性的实测研究[J];振动与冲击;2010年05期
4 徐安;傅继阳;赵若红;吴玖荣;;中信广场风场特性与结构响应实测研究[J];建筑结构学报;2009年01期
5 吕西林;程明;;超高层建筑结构体系的新发展[J];结构工程师;2008年02期
6 宋永发;常金鹏;王延龙;;高层建筑的顺风向风振响应分析及舒适度研究[J];防灾减灾工程学报;2007年04期
7 王建平;;基于AR模型方法的多维脉动风荷载时程的模拟[J];贵州大学学报(自然科学版);2007年05期
8 祁皑;范宏伟;;基于结构设计的基础隔震结构高宽比限值的研究[J];土木工程学报;2007年04期
9 陈丽;李秋胜;吴玖荣;傅继阳;李正农;肖仪清;;中信广场风场特性及风致结构振动的同步监测[J];自然灾害学报;2006年03期
10 顾明;叶丰;张建国;;典型超高层建筑风荷载幅值特性研究[J];建筑结构学报;2006年01期
相关博士学位论文 前3条
1 商昊江;高层钢筋混凝土基础隔震结构减振研究[D];福州大学;2011年
2 王莺歌;塔式太阳能定日镜结构风荷载特性及风致响应研究[D];湖南大学;2011年
3 燕辉;复杂体型高层建筑风荷载及风振响应研究[D];浙江大学;2004年
相关硕士学位论文 前10条
1 张瑞君;基础隔震框架结构的抗震性能分析[D];太原理工大学;2016年
2 莫玉;粘滞阻尼器在钢筋混凝土框剪结构中减震作用分析及优化设计[D];西南石油大学;2015年
3 王冬梅;带铅芯橡胶隔震支座基础的框架结构隔震性能分析[D];成都理工大学;2015年
4 胡淼;某超限高层建筑风荷载及风致振动研究[D];合肥工业大学;2015年
5 万珑;基于阻尼的高层建筑抗风减振优化设计[D];南昌大学;2013年
6 刘申会;高层建筑的风荷载特性数值模拟研究[D];湖南大学;2013年
7 吕志勇;不同隔震支座的隔震效应分析对比[D];安徽建筑大学;2013年
8 董华;钢筋混凝土筒中筒结构及其裙深梁受力性能分析[D];太原理工大学;2012年
9 刘润富;超高层建筑风致振动及舒适度研究[D];西南交通大学;2011年
10 刘迪;附设耗能装置的基础隔震建筑抗震性能研究[D];兰州理工大学;2010年
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