本文選題：強(qiáng)柱弱梁 + 碳纖維　； 參考：《河北聯(lián)合大學(xué)》2014年碩士論文

【摘要】：根據(jù)歷來(lái)地震給結(jié)構(gòu)造成破壞的經(jīng)驗(yàn)可知，框架結(jié)構(gòu)的破壞形式多為“強(qiáng)梁弱柱”，因此，建筑結(jié)構(gòu)大面積倒塌。為此研究人員尋求解決辦法。例如，提高阻尼：隔震加固、減震加固；提高承載力：設(shè)墻加固、設(shè)支撐加固、加固墻、加固柱；改善剛度：設(shè)墻加固、加固墻；提高延性：加固柱、設(shè)縫加固等等。震中“弱柱強(qiáng)梁”的破壞形式給結(jié)構(gòu)造成的破壞最嚴(yán)，為此，希望通過(guò)加固碳纖維來(lái)轉(zhuǎn)變結(jié)構(gòu)的破壞機(jī)制，減輕建筑物的破壞。由于碳纖維的彈性模量大、抗拉強(qiáng)度高、耐火極限好，并且施工方便快捷，從而廣泛應(yīng)用于工程結(jié)構(gòu)加固。 通過(guò)2個(gè)試件的動(dòng)力試驗(yàn)加載，研究加固前后柱和梁先后的屈服機(jī)制，并分析樓板鋼筋應(yīng)力隨遠(yuǎn)近不同的變化，以及加固前后板筋應(yīng)力的比較。同時(shí)分析結(jié)構(gòu)的整體耗能能力、剛度退化、延性系數(shù)。在試驗(yàn)研究基礎(chǔ)上，進(jìn)行了框架柱加固簡(jiǎn)化模型設(shè)計(jì)及計(jì)算分析，分析加固后的臨界承載力和剛度矩陣的變化。從試驗(yàn)角度講，梁鉸屈服機(jī)制得到實(shí)現(xiàn)；耗能面積加大；剛度退化減慢；延性系數(shù)減小，但也滿足延性系數(shù)的要求。從理論計(jì)算角度講，，臨界承載力得到提高；剛度矩陣變大，水平承載力得到提高。
[Abstract]:According to the experience of structural damage caused by earthquake, the failure form of frame structure is mostly "strong beam and weak column", therefore, the building structure collapses in a large area. The researchers sought a solution for this. For example, increase damping: isolation reinforcement, seismic reinforcement; increase bearing capacity: wall reinforcement, support strengthening, strengthening wall, reinforcement column; improve stiffness: wall reinforcement, strengthening wall; improve ductility: strengthening column, joint reinforcement, etc. The damage form of "weak column and strong beam" in the epicenter is the most severe. Therefore, it is hoped that the destruction mechanism of the structure can be changed by strengthening carbon fiber, and the damage of buildings can be alleviated. Because carbon fiber has high elastic modulus, high tensile strength, good fire resistance limit and convenient construction, it is widely used in engineering structure strengthening. The yield mechanism of columns and beams before and after reinforcement is studied by dynamic test of two specimens. The stress of floor steel bar varies with the distance and near, and the stress of slab reinforcement before and after reinforcement is compared. At the same time, the overall energy dissipation capacity, stiffness degradation and ductility coefficient of the structure are analyzed. On the basis of experimental study, the simplified model design and calculation analysis of frame column reinforcement are carried out, and the changes of critical bearing capacity and stiffness matrix after reinforcement are analyzed. From the experimental point of view, the yield mechanism of beam hinge is realized; the energy dissipation area is increased; the stiffness degradation is slowed down; the ductility coefficient is reduced, but the ductility coefficient is also satisfied. From the point of view of theoretical calculation, the critical bearing capacity is improved, and the stiffness matrix is increased, and the horizontal bearing capacity is improved.
【學(xué)位授予單位】：河北聯(lián)合大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TU352.11;TU375.4

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