本文關(guān)鍵詞： 單跨框架 抗震加固 彈性反應(yīng)譜分析 靜力彈塑性分析　出處：《華中科技大學(xué)》2013年碩士論文　論文類型：學(xué)位論文

【摘要】：既有建筑物的抗震加固設(shè)計(jì)擁有廣泛的應(yīng)用前景，選擇合理的結(jié)構(gòu)體系加固方案是抗震加固設(shè)計(jì)的重點(diǎn)。本文研究的方向在于努力獲得較好的關(guān)于帶懸挑外廊式單跨框架結(jié)構(gòu)的抗震加固方法，為此類既有建筑物提供較好的抗震加固設(shè)計(jì)方案。 本文首先介紹了現(xiàn)有框架結(jié)構(gòu)的主要形式，結(jié)合我國歷次地震中框架結(jié)構(gòu)的震害情況，總結(jié)了框架結(jié)構(gòu)的主要震害特征，并分析了震害產(chǎn)生的原因。對(duì)帶懸挑外廊單跨框架結(jié)構(gòu)進(jìn)行彈性反應(yīng)譜分析和靜力彈塑性分析，，帶懸挑外廊單跨框架結(jié)構(gòu)冗余度少，在大震作用下樓層側(cè)移較大，結(jié)構(gòu)塑性鉸發(fā)展較快，較早形成機(jī)構(gòu)，易倒塌。針對(duì)以上結(jié)構(gòu)薄弱環(huán)節(jié)，提出增設(shè)框架柱和增設(shè)剪力墻的結(jié)構(gòu)體系加固方案，并分別進(jìn)行了彈性反應(yīng)譜分析和靜力彈塑性分析，兩種結(jié)構(gòu)體系加固方案均能夠起到改善抗震性能和提高抗倒塌能力的作用。 本文主要分析結(jié)論如下：增設(shè)框架柱加固方案增加了結(jié)構(gòu)冗余度，提高了結(jié)構(gòu)抗側(cè)剛度，在大震作用下，塑性鉸發(fā)展緩慢，形成較好的“梁鉸機(jī)制”，結(jié)構(gòu)抗震性能和抗倒塌能力都相應(yīng)提高；Y向增設(shè)剪力墻加固方案使結(jié)構(gòu)Y向剛度顯著增加，側(cè)移減小，僅梁端出現(xiàn)塑性鉸，且發(fā)展緩慢，最終沒有形成機(jī)制，有效起到改善抗震性能和提高抗倒塌能力的作用，但其對(duì)結(jié)構(gòu)X向抗震性能并沒有起到改善作用。
[Abstract]:The seismic reinforcement design of existing buildings has a wide application prospect. It is the focal point of aseismic reinforcement design to select a reasonable structural system strengthening scheme. The research direction of this paper is to obtain a better seismic reinforcement method for single-span frame structure with cantilever outerpass. To provide a better seismic reinforcement design scheme for this kind of existing buildings. This paper first introduces the main forms of the existing frame structure, combined with the earthquake damage of the frame structure in previous earthquakes in China, summarizes the main damage characteristics of the frame structure. The elastic response spectrum analysis and static elastic-plastic analysis of single-span frame structure with overhanging veranda are carried out, and the redundant degree of single-span frame structure with overhanging veranda is less. Under the action of strong earthquake, the floor is larger, the plastic hinge of the structure develops rapidly, the mechanism is formed earlier and the structure collapses easily. In view of the weak link of the above structure, the reinforcement scheme of the structural system with the addition of the frame column and the additional shear wall is put forward. The elastic response spectrum analysis and the static elastoplastic analysis are carried out respectively. The two strengthening schemes can improve the seismic performance and the ability to resist collapse. The main conclusions of this paper are as follows: the addition of frame column reinforcement scheme increases the redundancy of the structure and improves the lateral stiffness of the structure. Under the action of strong earthquake, the plastic hinge develops slowly and forms a better "beam hinge mechanism". The seismic performance and collapse resistance of the structure are improved accordingly. The Y direction shear wall reinforcement scheme can significantly increase the Y direction stiffness of the structure, decrease the lateral displacement, only the plastic hinge appears at the end of the beam, and the development is slow, and there is no formation mechanism at the end. It can effectively improve the seismic performance and the anti-collapse ability, but it does not improve the X-direction seismic performance of the structure.
【學(xué)位授予單位】：華中科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類號(hào)】：TU352.11

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