高层建筑消能减震结构抗超大震性能分析与设计

发布时间：2018-01-06 01:24

本文关键词：高层建筑消能减震结构抗超大震性能分析与设计　出处：《大连理工大学》2015年硕士论文　论文类型：学位论文

【摘要】：地震是一种危害性极大的自然灾害,由于其发生的随机性和不确定性,往往会造成惨重的人员伤亡和巨大的经济损失。随着社会发展和人们生活水平的提高,对高层建筑等重要性和城市功能保障性结构的抗震性能要求也日益增高。然而按照传统抗震设防准则“小震不坏,中震可修,大震不倒”设计的结构,会在大震发生后造成巨大的经济损失、难以使结构在突发的超大震作用下不倒塌以及难以保证重要建筑和城市功能保障性建筑在大震中正常工作。消能减震结构具有安全性、经济性和易实现更高的抗震性能等优越性,为抗震结构在可接受的经济水平内实现结构抗超大震的性能目标提供了可能。本文在传统抗震设防准则的基础上,提出了针对消能减震结构的一种更高的设防准则“超大震不倒”,并对高层建筑消能减震结构抗超大震性能进行了详细分析,主要包括以下内容和结论。(1)论述了结构抗超大震性能实现的必要性和可行性,采用结构设计软件PKPM按照现行8度(0.20g)设防的要求设计了一座12层平面钢筋混凝土框架结构,并在该框架结构上分别布置粘滞消能器、摩擦消能器和防屈曲支撑,得到三个消能减震结构,应用结构非线性分析与性能评估软件PERPORM3D对平面框架结构和三个消能减震结构分别进行8度小震、8度大震和9度大震作用下的时程分析,结果表明：小震作用下,摩擦消能器和防屈曲支撑均未起滑或屈服,而粘滞消能器能为主体结构提供较大的附加阻尼；摩擦消能器无论在小震、大震和超大震作用下均能起到很好的减震效果；分别应用了粘滞消能器、摩擦消能器和防屈曲支撑的三个消能减震结构均能实现抗超大震性能,满足“超大震不倒”的设防准则(性能目标)(2)选择一座7度(0.10g)设防的20层钢筋混凝土剪力墙结构,在该结构第2-13层的相应位置布置摩擦消能器,得到一个消能减震结构,对剪力墙结构和消能减震结构应用结构非线性分析与性能评估软件PERFORM3D进行7度小震、7度大震和8度大震作用下的时程分析,结果表明：摩擦消能器能起到较好的控制效果；摩擦消能器能为主体结构提供较大的附加阻尼比；避免消能减震结构没有布置消能器的楼层层间位移角比相应原结构的层间位移角大,消能器应尽量在竖向每层都布置；布置摩擦消能器的消能减震结构满足“超大震不倒”的设防准则(性能目标)(3)采用结构分析与设计软件SAP2000按照现行8度(0.20g)设防的要求设计了一座48层巨型结构,并将此结构的所有普通支撑分别用与其等刚度和等面积的防屈曲支撑代替,分别得到等刚度防屈曲支撑巨型结构和等面积防屈曲支撑巨型结构,然后分别对巨型结构和两个防屈曲支撑结构进行8度、8.5度和9度罕遇地震下的弹塑性时程分析。分析结果表明：在8度罕遇地震作用下,防屈曲支撑巨型结构较普通支撑巨型结构的最大层间位移角有明显减小,且层间位移角变化更均匀；防屈曲支撑巨型结构能达到“超大震不倒”的设防准则(性能目标),提高了结构的安全储备。
[Abstract]:The earthquake is a great danger of natural disasters, due to the randomness and uncertainty of its occurrence, often result in heavy casualties and huge economic losses. With the development of society and the improvement of people's living standard, also increased to high-rise building and the importance of city function security requirements. However, the seismic performance of structures according to the traditional seismic fortification criterion "no damage under small earthquakes, the earthquake can repair, the structure design of the earthquake does not fall, will cause huge economic losses in the earthquake occurred, it is difficult to make the structure collapsed in the large earthquake burst and it is difficult to guarantee the protection of important buildings and city function building in the earthquake in normal work. Energy dissipation structure is safe, economical and easy to realize the advantages of higher seismic performance, for seismic structure in the structure to achieve acceptable economic level of anti earthquake of large projects The subject may be provided. Based on the traditional seismic fortification criterion, proposes an energy dissipation structure and higher standards of "super fortification earthquake without collapse, and the high-rise building energy dissipation are analyzed in detail the anti shock performance of large damping structure, mainly includes the following contents and conclusions. (1) discusses the necessity and feasibility of the anti shock performance of the super structure, using structure design software PKPM according to the current 8 degree (0.20g) proof requirements to design a 12 floor reinforced concrete frame structure and the frame structure are distributed on the viscous damper, friction damper and BRB. Three energy dissipation structure, the plane frame structure and three energy dissipation were small earthquake 8 degrees application structure nonlinear analysis and performance evaluation of software PERPORM3D, 8 degree and 9 degree earthquake under strong earthquake time history analysis results table Ming: small earthquake, friction damper and BRB were not sliding or yield, while the viscous dampers can provide additional damping for large main structure; friction energy dissipation device in small earthquake, large earthquake and large earthquake can play a very good damping effect respectively; the application of viscous dampers, friction damper and BRB three energy dissipation structure can realize large anti shock performance, meet the criteria of large fortification earthquake without collapse "(performance) (2) a 7 degree (0.10g) fortification 20 layer reinforced concrete shear wall structure in the corresponding position, arrangement of the structure of the 2-13 layer of the friction energy dissipation device, an energy dissipation structure, the shear wall structure of energy dissipation and nonlinear damping structure application structure analysis and performance evaluation of PERFORM3D software for small earthquake of 7 degrees, 7 degrees and 8 degrees earthquake under strong earthquake time history analysis the results show that. That is very effective to eliminate friction; which can provide additional damping larger than for the main structure to avoid friction; energy dissipation structure without dissipation floors is arranged between the displacement angle than the corresponding original structure of the interlayer displacement angle is large, the energy dissipation in each layer should be vertical all friction damper layout layout; energy dissipation structure to meet the criteria for large fortification earthquake without collapse "(performance) (3) by structural analysis and design software SAP2000 according to the current 8 degree (0.20g) proof requirements to design a 48 layer of mega structure, and all the general support of this structure with its stiffness and buckling restrained brace instead of equal area, respectively, equivalent stiffness of buckling restrained brace mega structure and area of BRB mega structure, then the mega structure and two BRB structure was 8 degrees, 8.5 degrees and 9 degrees Under rareearthquake elastic-plastic time history analysis. The analysis results show that: in the rare earthquake of 8 degrees, BRB mega structure than the ordinary maximum support layer mega structure displacement angle is significantly reduced, and the interlayer displacement angle change is more uniform; BRB mega structure can achieve "fortification criterion large earthquake does not fall" (performance), improve the safety of structures.

【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU973.31

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