本文選題：耗能減震 + 低屈服點鋼��； 參考：《華中科技大學》2013年碩士論文

【摘要】：支撐是結構抗側力體系的一種重要構件，阻尼器可以大幅降低主體結構的地震反應，低屈服點鋼屈曲約束支撐(簡稱BRB)是一種新型的耗能構件。低屈服點鋼屈服點比普通鋼材低，較小變形時即可進入塑性，耗散能量。本文用BLY100低屈服點鋼制作屈曲約束支撐，克服了傳統(tǒng)支撐體系受壓屈曲的缺點，其滯回曲線十分飽滿，是一種較有應用前景的結構體系。 本文首先介紹了低屈服點鋼屈曲約束支撐的原理和構造形式，用有限元軟件ANSYS對六種長度和截面面積不同的屈曲約束支撐進行分析，得出其耗能量、屈服前剛度、屈服后剛度與截面面積、長度的關系。然后，制作一個屈曲約束支撐，進行拉壓試驗，得到其滯回曲線，，結果表明其滯回曲線比較飽滿，具有出色的耗能能力，與ANSYS分析結果一致。最后，通過算例得出屈曲約束支撐具有較好的抗震能力，可以改善支撐框架結構的承載能力，通過滯回耗能減小結構在地震作用下反應，降低了主體結構的破壞程度，提高了整體結構的抗震能力。 BLY100低屈服點鋼制作的屈曲約束支撐能降低結構的地震內力，具有出色的耗能能力，是很有應用前景的新型耗能減震裝置。
[Abstract]:Bracing is an important component of structural lateral force system. Damper can greatly reduce the seismic response of the main structure. Low yield point steel buckling restrained bracing (BRBs) is a new type of energy dissipation member. The yield point of low yield point steel is lower than that of common steel. In this paper, BLY100 steel with low yield point is used to make buckling restrained braces, which overcomes the shortcoming of traditional bracing system under compression buckling, and its hysteretic curve is very full, which is a kind of structural system with better application prospect. In this paper, the principle and construction form of buckling restrained braces of low yield point steel are introduced. Six kinds of buckling restrained braces of different length and cross section area are analyzed by finite element software ANSYS, and the energy consumption and the stiffness before yield are obtained. The relationship between stiffness and cross-section area and length after yield. Then, a buckling restrained bracing is made, and the hysteretic curve is obtained by tensile and compression tests. The results show that the hysteretic curve is full and has excellent energy dissipation ability, which is consistent with the results of ANSYS analysis. Finally, it is concluded that buckling restrained braces have good seismic capacity, which can improve the bearing capacity of braced frame structures, reduce the response of the structures under earthquake through hysteretic energy dissipation, and reduce the failure degree of the main structure. The buckling restrained bracing made of BLY100 low yield point steel can reduce the seismic internal force of the structure and has excellent energy dissipation ability. It is a new type of energy dissipation device with good application prospect.
【學位授予單位】：華中科技大學
【學位級別】：碩士
【學位授予年份】：2013
【分類號】：TU391

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本文編號：2016263