本文關(guān)鍵詞： 防屈曲支撐 屈曲 抗震性能 試驗研究 恢復力模型　出處：《西安建筑科技大學》2013年碩士論文　論文類型：學位論文

【摘要】：目前國內(nèi)外的地震區(qū)都在普遍使用支撐—框架體系，，是由于這種體系能給框架結(jié)構(gòu)整體提供較大的抗側(cè)移剛度，提高建筑物的抗震性能。在1994年的美國北嶺地震以及1995年的日本阪神地震中，大量裝有中心普通支撐體系的樓房在地震中倒塌。事后對倒塌的房屋進行檢測分析的時發(fā)現(xiàn)，大多數(shù)是由于支撐過早的發(fā)生屈曲從而使得結(jié)構(gòu)承載力下降引發(fā)的。為了解決這個問題，專家和學者提出了一種新的支撐，來保證這種支撐在大震的時候可以屈服，從而起到保護整體結(jié)構(gòu)的作用，但是絕對不能發(fā)生屈曲，稱之為防屈曲支撐。這種體系目前已經(jīng)在美國和日本被大量的應(yīng)用到實際工程當中，以優(yōu)異的抗震性能得到了大家的認可。在國內(nèi)也有越來越多的科研人員投入到防屈曲支撐的研究領(lǐng)域中來。 本次試驗采用的是國產(chǎn)Q235熱軋鋼材設(shè)計并制作防屈曲支撐，測試了鋼材的力學性能，制作了6個防屈曲支撐試件，研究其分別在3種芯材橫截面、2種灌實材料變化下對構(gòu)件的耗能能力以及抗震性能的影響。通過低周反復荷載加載試驗對六個防屈曲支撐試件的抗震性能進行了研究，具體有力—位移滯回曲線、剛度退化過程、骨架曲線、強度退化過程、耗能能力、等效粘滯阻尼比等。試驗結(jié)果表明，一字形芯材防屈曲支撐的構(gòu)造合理，所有試件的滯回曲線穩(wěn)定飽滿；芯材特性和灌實材料強度對于該種防屈曲支撐的耗能性能均有顯著影響。其次分析了本次構(gòu)件的穩(wěn)定性，有整體穩(wěn)定與內(nèi)核芯材的穩(wěn)定，并推導了相關(guān)的公式。在試驗的基礎(chǔ)上得到了防屈曲支撐的恢復力模型，并將測定結(jié)果與雙線性模型計算出的理論值進行了比較。結(jié)果表明,這種新型屈曲約束支撐各項力學指標實測值與理論值符合較好,耗能能力穩(wěn)定,滿足國內(nèi)外規(guī)范的要求，達到了工程應(yīng)用的標準。
[Abstract]:At present, brace-frame system is widely used in earthquake areas both at home and abroad, because this kind of system can provide greater lateral stiffness to the whole frame structure. To improve the seismic performance of buildings. During the earthquakes of 1994 in the North Ridge, and 1995 in Hanshin, Japan, a large number of buildings with a central support system collapsed in the earthquake. In order to solve this problem, experts and scholars have proposed a new kind of brace to ensure that it can yield in the event of a strong earthquake. It can protect the whole structure, but it must not be buckled, which is called buckling bracing. This kind of system has been widely used in practical projects in the United States and Japan. Because of its excellent seismic performance, more and more researchers are engaged in the research field of buckling bracing. In this experiment, the domestic Q235 hot rolled steel was designed and manufactured to resist buckling. The mechanical properties of the steel were tested, and six specimens of anti-buckling support were made. The effects of three kinds of core materials on the energy dissipation capacity and seismic performance of the members were studied. The seismic behavior of six specimens of buckling braces was studied by low cycle cyclic loading test. The concrete force-displacement hysteretic curve, stiffness degradation process, skeleton curve, strength degradation process, energy dissipation capacity, equivalent viscous damping ratio, etc. The experimental results show that the structure of a zigzag core against buckling braces is reasonable. The hysteretic curve of all specimens is stable and full, and the properties of core material and the strength of compacted material have a significant effect on the energy dissipation performance of this kind of anti-buckling bracing. Secondly, the stability of this component is analyzed, with the stability of the whole component and the stability of the core material. On the basis of experiments, the restoring force model of buckling braces is obtained, and the measured results are compared with the theoretical values calculated by the bilinear model. The results show that, The measured values of the new buckling constraint braces are in good agreement with the theoretical values, the energy dissipation capacity is stable and meets the requirements of the domestic and foreign codes and meets the engineering application standards.
【學位授予單位】：西安建筑科技大學
【學位級別】：碩士
【學位授予年份】：2013
【分類號】：TU352.1;TU317

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