【摘要】：隨著科技的進(jìn)步,人們生活質(zhì)量的提高,以及建筑場地的限制和建筑功能的要求,越來越多的不規(guī)則高層建筑涌現(xiàn)在人們的面前。在地震力作用下,不規(guī)則結(jié)構(gòu)除了會產(chǎn)生水平位移之外還會發(fā)生扭轉(zhuǎn)效應(yīng),因此,對不規(guī)則結(jié)構(gòu)的抗震分析顯得尤為重要。 本文以一棟實際的L形不規(guī)則平面高層建筑為例,對該建筑結(jié)構(gòu)的抗震性能進(jìn)行分析與評估。首先,使用PKPM與MIDAS分別建立模型并對其進(jìn)行小震下的靜力彈性分析。其次,對計算結(jié)果的各項參數(shù)進(jìn)行對比,結(jié)果表明它們均符合規(guī)范要求。再者,用MIDAS對整個結(jié)構(gòu)進(jìn)行了靜力彈塑性分析(pushover),主要是對其層間位移角、性能點、塑性鉸順序進(jìn)行分析,得出結(jié)構(gòu)在罕遇地震作用下能達(dá)到“大震不倒”的要求。然后,為了找出不同的側(cè)向力荷載分布模式對此類L形結(jié)構(gòu)的影響,利用倒三角形、矩形、實時模式和CQC模式四種不同側(cè)向力加載模式進(jìn)行對比,結(jié)果發(fā)現(xiàn)實時模式與CQC模式計算結(jié)果曲線基本重合,誤差很��；整個樓層中上部倒三角形荷載模式引起的內(nèi)力最大,整個樓層下部矩形荷載模式引起內(nèi)力最大。因此設(shè)計時建議采用這兩種加載模式的包絡(luò)值進(jìn)行配筋設(shè)計。最后,對整個結(jié)構(gòu)進(jìn)行了彈性時程補充分析和薄弱層樓板應(yīng)力分析,得出時程補充分析時地震波的選取是關(guān)鍵因素,樓板應(yīng)力集中部位應(yīng)采取加強(qiáng)措施。
[Abstract]:With the development of science and technology, the improvement of people's quality of life, the limitation of construction site and the requirement of building function, more and more irregular high-rise buildings appear in front of people. Under the action of seismic force, the torsional effect of irregular structures will occur in addition to horizontal displacement, so the seismic analysis of irregular structures is particularly important. Taking an actual L-shaped irregular plane high-rise building as an example, the seismic performance of the building structure is analyzed and evaluated in this paper. Firstly, PKPM and MIDAS are used to establish the model and analyze the static elasticity of the model under small earthquakes. Secondly, the parameters of the calculation results are compared, the results show that they all meet the specification requirements. Furthermore, the static elastic-plastic analysis of the whole structure is carried out by using MIDAS. The main purpose of (pushover), is to analyze the displacement angle, the performance point and the plastic hinge sequence of the whole structure. It is concluded that the structure can meet the requirement of "strong earthquake will not collapse" under the action of rare earthquake. Then, in order to find out the influence of different lateral load distribution modes on the L shape structure, four different lateral force loading modes, inverted triangle, rectangle, real time mode and CQC mode, are compared. The results show that the curve of real time mode and CQC model basically coincide with each other, and the error is very small, and the internal force caused by inverted triangle load mode in the upper part of the whole floor is the largest, and the internal force caused by the rectangular load mode in the whole floor is the largest. Therefore, the envelope value of these two loading modes is recommended for reinforcement design. Finally, the elastic time-history supplementary analysis and the weak floor stress analysis are carried out for the whole structure. It is concluded that the selection of seismic wave is the key factor in the time-history supplementary analysis, and the strengthening measures should be taken in the stress concentration part of the floor.
【學(xué)位授予單位】：廣西大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2013
【分類號】：TU973.16;TU973.31

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