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  本文選題：單跨框架結(jié)構(gòu) + 抗震加固��； 參考：《重慶大學(xué)》2014年碩士論文

【摘要】：5.12汶川地震中單跨教學(xué)樓框架結(jié)構(gòu)的嚴重震害引起了廣大科研工作者和工程設(shè)計人員的高度重視，為此我國抗震設(shè)計規(guī)范及相關(guān)規(guī)程進行了相繼更新，明確規(guī)定乙類建筑不能采用單跨框架結(jié)構(gòu)。然而我國尚有一大批既有單跨框架結(jié)構(gòu)亟需抗震加固，如何對該類結(jié)構(gòu)進行合理、有效的抗震加固仍是目前困擾工程界的主要難題之一，因此本文對適用于該類建筑增設(shè)鋼筋混凝土剪力墻的抗震加固方案進行探索，力求為工程人員提供一個注重整體結(jié)構(gòu)抗震性能且易于實施的加固設(shè)計思路。 本文針對三棟鋼筋混凝土單跨框架結(jié)構(gòu)，即6度（0.05g）、8度（0.2g）按89規(guī)范設(shè)計的單跨教學(xué)樓框架結(jié)構(gòu)以及7度（0.15g）單跨連廊框架結(jié)構(gòu)實際工程，分別提出三種不同加固方案，并采用OpenSees軟件建立了對應(yīng)的結(jié)構(gòu)分析模型，選取了一定數(shù)量的地震動，進行了多遇地震、設(shè)防地震和罕遇地震不同水平輸入下的地震反應(yīng)分析，同時考察了由于抗震墻的增加而導(dǎo)致原框架構(gòu)件的內(nèi)力和配筋的變化規(guī)律，，在此基礎(chǔ)上，提出了單跨教學(xué)樓和單跨連廊框架結(jié)構(gòu)的抗震加固方案的建議。 本文研究工作表明，不同烈度結(jié)構(gòu)抗震加固中剪力墻設(shè)置規(guī)律有所不同，即6度區(qū)單跨教學(xué)樓當(dāng)增設(shè)剪力墻承擔(dān)的地震傾覆力矩大于總地震傾覆力矩的50%時，結(jié)構(gòu)在不同地震輸入下的抗震性能就能滿足規(guī)范要求；對于8度區(qū)單跨教學(xué)樓，除滿足地震傾覆力矩要求，還須滿足層間位移角限值，且后者起控制作用。增設(shè)抗震墻后，雖然改善了整體結(jié)構(gòu)的抗震性能，但亦造成某些既有構(gòu)件的配筋需求增大。尤其是8度區(qū)結(jié)構(gòu)，隨著抗震墻墻肢長度的增加，導(dǎo)致更多的既有構(gòu)件承載能力不足而需要加固。 對于7度區(qū)多層單跨框架連廊，受其抗震墻布置方式和數(shù)量的影響，墻肢長度的少量增加反而引起整體結(jié)構(gòu)層間變形的增大，按改變框架結(jié)構(gòu)形式的最短墻長加固更為合理有效，且加固對原框架結(jié)構(gòu)中梁柱構(gòu)件的計算配筋影響較小。
[Abstract]:The serious earthquake damage of single-span teaching building frame structure in the Wenchuan earthquake caused great attention by the majority of scientific research workers and engineering designers. Therefore, the seismic design code and related regulations of our country have been updated one after another. It is clearly stipulated that no single span frame structure can be used in class B buildings. However, there is still a large number of existing single-span frame structures in our country, which are in urgent need of seismic reinforcement. How to carry out reasonable and effective seismic reinforcement of this kind of structures is still one of the main problems puzzling the engineering circle at present. So this paper explores the aseismic reinforcement scheme which is suitable for adding reinforced concrete shear wall to this kind of building, and tries to provide an idea of strengthening design which pays attention to the seismic behavior of the whole structure and is easy to carry out. This paper presents three different reinforcement schemes for three reinforced concrete single-span frame structures, I. e., the frame structure of single-span teaching building designed according to 89 code and the frame structure of single-span continuous corridor with 7 degrees or 0.15g, which are designed according to the code 89. The corresponding structural analysis model is established by using OpenSees software, and a certain number of ground motions are selected to analyze the seismic response under the different horizontal inputs of frequent earthquake, fortification earthquake and rare earthquake. At the same time, the internal force and reinforcement of the original frame members due to the increase of seismic walls are investigated. On this basis, suggestions for seismic reinforcement of single-span teaching building and single-span continuous corridor frame structure are put forward. The research results show that the law of shear wall setting is different in seismic reinforcement of different intensity structures, that is, when the shear wall is added to the teaching building with single span in 6 degrees, the seismic overturning moment is larger than that of the total seismic overturning moment, and when the shear wall is added, the seismic overturning moment is larger than the total seismic overturning moment. The seismic behavior of the structure under different earthquake input can meet the requirements of the code, and for the single-span teaching building in the 8-degree region, the limit of displacement angle between floors should be satisfied in addition to the seismic overturning moment requirement, and the latter plays a controlling role. After the addition of seismic walls, the seismic performance of the whole structure is improved, but the reinforcement demand of some existing members is increased. With the increase of the length of the wall limb, more and more existing members need to be strengthened because of the insufficient bearing capacity of the existing members. For the multi-story single-span frame corridor in 7 degree region, due to the influence of the arrangement and quantity of the seismic wall, the small increase of the length of the wall limb will result in the increase of the whole structure interstory deformation. It is more reasonable and effective to strengthen with the shortest wall length according to changing the form of frame structure, and the reinforcement has little effect on the calculation of Liang Zhu members in the original frame structure.
【學(xué)位授予單位】：重慶大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TU746.3;TU352.11

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