共查询到20条相似文献，搜索用时 549 毫秒
1.
方小兵 《五邑大学学报(社会科学版)》1992,(1)
本文采用矩阵传递法分析了调频质量阻尼器(TMD)被动控制高层建筑风振反应,导出了结构顶层位移、加速度和基底剪力频域内统计特征公式。最后通过实例的结果说明,经过控制后能显著地降低风振反应。 相似文献
2.
In the structural design of tall buildings, peak factors have been widely used to predict mean extreme responses of tall buildings
under wind excitations. Vanmarcke’s peak factor is directly related to an explicit measure of structural reliability against
a Gaussian response process. We review the use of this factor for time-variant reliability design by comparing it to the conventional
Davenport’s peak factor. Based on the asymptotic theory of statistical extremes, a new closed-form peak factor, the so-called
Gamma peak factor, can be obtained for a non-Gaussian resultant response characterized by a Rayleigh distribution process.
Using the Gamma peak factor, a combined peak factor method was developed for predicting the expected maximum resultant responses
of a building undergoing lateral-torsional vibration. The effects of the standard deviation ratio of two sway components and
the inter-component correlation on the evaluation of peak resultant response were also investigated. Utilizing wind tunnel
data derived from synchronous multi-pressure measurements, we carried out a wind-induced time history response analysis of
the Commonwealth Advisory Aeronautical Research Council (CAARC) standard tall building to validate the applicability of the
Gamma peak factor to the prediction of the peak resultant acceleration. Results from the building example indicated that the
use of the Gamma peak factor enables accurate predictions to be made of the mean extreme resultant acceleration responses
for dynamic serviceability performance design of modern tall buildings. 相似文献
3.
运用ＭＴＭＤｓ系统对高层建筑的地震反应进行多模态控制研究．首先描述了ＭＴＭＤｓ系统的构造及其主要参数,建立了高层建筑－ＭＴＭＤｓ系统耦联体系的运动方程,并对简谐地面运动激励下的多模态控制进行了参数优化,最后应用ＭＴＭＤｓ系统对受１９４０年Ｅｌ－Ｃｅｎｔｒｏ（ＮＳ方向）地震波激励的某１１层框架建筑进行了数值模拟,其结果显示多模态控制下该框架建筑的顶层位移幅值比单模态控制时降低了２０％左右;从而得出结论：ＭＴＭＤｓ系统是高层建筑地震反应控制的一种有效、可靠并实用的被动控制措施,且多模态控制比单模态控制具有更好的实用性和可靠性,因而展示了更广阔的应用前景． 相似文献
4.
复杂体型钢筋混凝土高层建筑的推覆分析方法和应用 总被引：2，自引：0，他引：2
In this paper, push-over analysis for tall concrete structures was made and a corresponding computer program was given.Several kinds of elements in the program were considered to meet the demand of tall buildings with complex structural type. These elements included beam-column element for beams and columns, single slice wall element and three vertical line element for walls, and tube-wall element for tubes. Computational example for verifying the models indicates that the result obtained by this method is identical with a well-known test result and the program can be used to search for the full process of structural reaction, even the softening stage of the structure. With this push-over analysis method, an actual tall building with complex structural type was analyzed, and the result has been put into practice of the structural design of the building. 相似文献
5.
This paper presents the simulation results of the wind environment around a single high-rise building and that around two tall buildings in tandem arrangement by using the lattice Boltzmann method with an aim to understand the ventilation issues around high-rise buildings in an urban environment. We analyzed the velocity distribution around the buildings and performed numericl simulations to reveal the formation and evolution law of the complex vortex system around the high-rise buildings. Numerical simulation results manifest a periodicity phenamenon in the process of the vortex evolution. For the case of two high-rise buildings, wind velocity in the space between the two buildings is very small, which is nearly a silent regime. Wind velocity above the front building is relatively larger and the maximum wind velocity is approximately 2.5 times the incoming wind velocity. The numerical results can be used in layout planning of high-rise residential buildings to create better environment for ventilation purpose in an urban area. 相似文献
6.
李远瑛 《洛阳工业高等专科学校学报》2006,16(2):19-20,61
利用有限元分析软件ANSYS对某高层建筑结构进行模态分析,建立高层建筑结构的三维模型,研究该结构的动力特性,并将计算得到结构的自振周期同经验公式比较,探讨计算高层建筑结构自振周期的影响因素,结果表明两种计算方法结果十分接近,验证了有限元分析的正确性。 相似文献
7.
小波分解法在多自由度线性体系地震反应分析中的应用 总被引：1，自引：0，他引：1
吴琛 《福建工程学院学报》2008,6(3):213-218
介绍小波变换的分频机理,利用多分辨分析推导多自由度线性体系地震反应分析的基本公式,建立求解结构动力响应的小波分解法.算例表明:线性体系的地震响应可由各频带动力响应叠加而成,验证了线性系统动力响应唯一性的结论.利用小波多分辨率的特点可安全有效地滤去地震动高频成分,提高信噪比.高频抑制后的重构信号动力响应与原始地震动响应误差很小,说明地震动高频成分对结构振动影响甚微. 相似文献
8.
从低碳建筑节能技术、实际运行能耗、建筑生命周期的碳排放和经济性4个方面对低碳建筑进行了综合评价。通过统计与分析,建立了建筑的分级指标体系。运用数学上的层次分析法和功能性评价法,确定每项指标的权重系数,采取定性和定量相结合的原则,对建筑的低碳程度给予评价。 相似文献
9.
GONG Shunfeng LU Yong GAO Feng JIN Weiliang 《天津大学学报(英文版)》2006,12(B09):248-253
For a building structure subjected to impulsive loading, particularly shock and impact loading, the response of the critical columns is crucial to the behaviour of the entire system during and after the blast loading phase. Therefore, an appropriate evaluation of the column response and damage under short-duration impulsive loading is important in a comprehensive assessment of the performance of a building system. This paper reports a dynamic analysis approach for the response of RC columns subjected to impulsive loading. Considering that the dynamic response of a column in a frame structure can also be affected by the floor movement which relates to the global vibration of the frame system, a generic column-mass model is used, in which a concentrated mass is attached to the column top to simulate the effect of a global vibration. To take into account the high shear effect under impulsive load, the model is formulated using Timoshenko beam theory, and three main nonlinear mechanisms are considered. Two typical scenarios, one under a direct air blast loading, and another under a blast-induced ground excitation, are analyzed and the primary response features are highlighted. 相似文献
10.
For a building structure subjected to impulsive loading, particularly shock and impact loading , the response of the critical columns is crucial to the behaviour of the entire system during and after the blast loading phase. Therefore, an appropriate evaluation of the column response and damage under short-duration impulsive loading is important in a comprehensive assessment of the performance of a building system. This paper reports a dynamic analysis approach for the response of RC columns subjected to impulsive loading. Considering that the dynamic response of a column in a frame structure can also be affected by the floor movement which relates to the global vibration of the frame system, a generic column-mass model is used, in which a concentrated mass is attached to the column top to simulate the effect of a global vibration. To take into account the high shear effect under impulsive load, the model is formulated using Timoshenko beam theory, and three main nonlinear mechanisms are considered. Two typical scenarios, one under a direct air blast loading, and another under a blast-induced ground excitation, are analyzed and the primary response features are highlighted. 相似文献
11.
以控制高层建筑结构变形为目标,结合高层建筑结构混凝土的特点,探讨了混凝土组成材料水泥、骨料、活性掺合料及外加剂的选用原则,可作为高层建筑的施工应用与参考,对高层建筑结构变形控制具有重要意义。 相似文献
12.
何延飞 《佳木斯教育学院学报》2012,(7):390-391
当前,世界不同地方的高层建筑蓬勃发展,逐渐成为城市现代化程度的标志之一。建筑的高度越来越高,结构形式上也越来越复杂,已不再是平面布置简单、对称、规则,竖向质量和刚度沿高度均匀分布,而是形成了各种高度超限、竖向和平面不规则的复杂结构。我们可以看到高层建筑在地震灾害中会受到巨大的损失。而地震区建筑结构设防与不设防,震后结果大不一样。想要在地震中减少地震灾害,就要做好工程建设的抗震设计,这样才能真正达到减轻以至避免地震造成的损失。文章依据有关资料和相关实践经验,对高层房屋结构抗震问题进行了相关研究。 相似文献
13.
14.
通过对几种低压配电接地型式的比较、分析，提出适合大厦的低压配电系统的接地型式及建筑物的共用接地装置和等电位连接的措施与设计方法。 相似文献
15.
季思言 《山东商业职业技术学院学报》2010,10(4):95-97
从分析消防应急照明系统在电源、转换时间、照度、供电方式等方面入手,针对我国的高层民用建筑中消防应急照明系统设计存在的问题进行了分析,旨在探讨一套合理的消防应急照明设计方案。 相似文献
16.
高压输电线路导线跌落非线性动响应分析(英文) 总被引：1，自引：0，他引：1
为了研究机械性故障对高压输电线路耦合体系的受力影响,建立了输电线路耐张段的非线性耦合体系模型,通过导线找形非线性静力计算确定了耐张段的初始平衡状态.采用瞬态动力分析方法计算了导线、绝缘子破坏失效危险工况下的输电线路耦合体系非线性动响应.分析结果表明,上横担一组导线断裂失效对邻近端导线张力没有明显影响,对邻近端的绝缘子及铁塔横担构件的受力有较大的影响;上横担一组绝缘子破坏失效后,破坏档未破坏端导线的张力超过了技术规程中的设计值;导线的跌落对破坏档未破坏端的上横担绝缘子受力有较大的影响,而对上横担铁塔杆件没有明显的影响;在架空送电线路的设计中应该考虑绝缘子断裂的荷载工况.研究成果可为输电线路结构设计提供理论依据. 相似文献
17.
王付海 《福建工程学院学报》2012,(4):373-378
对于节能建筑而言,建筑投资、能源消耗等经济性指标不仅反映了初始建设阶段中的一次性投资,更反映于建筑运营期内的能源消耗费用。基于节能建筑中一些效果难以或不能货币化,文章综合应用了财务评价法和费用效果法具体分析了厦门某节能住宅。结果表明:节能建筑优于非节能建筑,在经济上是可行的,而且提高了居住舒适度,为社会节约了大量资源。 相似文献
18.
通过对几种低压配电接地型式的比较、分析,提出适合大厦的低压配电系统的接地型式及建筑物的共用接地装置和等电位连接的措施与设计方法。 相似文献
19.
探讨了夏热冬冷地区的气候特征和建筑结构的热传递机理,从建筑围护结构的热传导和蓄热两个方面,通过热传导的非稳态过程分析方法,分析了该地区建筑围护结构的传热特性,并得出准确计算建筑热负荷工程设计的计算方法和内保温建筑围护结构更适宜于夏热冬冷地区建筑节能设计的结论。 相似文献
20.
张驰 《佳木斯教育学院学报》2012,(8):137+140
高层建筑的发展正风靡全世界,近年来,中国的高层建筑也在不断横空出世,林立于各类城市。高层建筑设计作为建筑学专业的一门重要课程,其内容随着行业的需求和发展模式的更新,也需要展开一系列的课程教学改革。本文将在研究高层建筑设计教学改革必要性的基础上,提高教学内容的实践性,对教学内容的重点、难点展开剖析,以促使教学内容获得较好的教学效果。 相似文献