本文選題：拉鏈柱式中心支撐鋼框架 + 拉鏈柱��； 參考：《河北科技大學(xué)》2014年碩士論文

【摘要】：拉鏈柱式中心支撐鋼框架結(jié)構(gòu)是基于傳統(tǒng)的人字形中心支撐鋼框架結(jié)構(gòu)基礎(chǔ)上發(fā)展起來的一種新型結(jié)構(gòu)體系,拉鏈柱即是連接每個支撐與被撐梁交點的豎向受力構(gòu)件。目前,國內(nèi)外有關(guān)此類體系抗震性能的研究還較少,我國規(guī)范亦沒有給出有針對性的設(shè)計條文。本文在總結(jié)國內(nèi)外相關(guān)研究現(xiàn)狀的基礎(chǔ)上,對拉鏈柱式中心支撐鋼框架結(jié)構(gòu)基本構(gòu)件(包括拉鏈柱、支撐跨柱、支撐、被撐梁)的抗震設(shè)計方法進(jìn)行了研究,具體如下:1)參照懸掛拉鏈柱式中心支撐鋼框架結(jié)構(gòu)的設(shè)計方法,設(shè)計了兩組對比算例,其中支撐分別按考慮與不考慮受循環(huán)荷載時的強度降低系數(shù)設(shè)計。對算例的自振特性、用鋼量、多遇及罕遇地震下的動力響應(yīng)等指標(biāo)進(jìn)行了分析比較,綜合考慮用鋼量、結(jié)構(gòu)動力響應(yīng)等指標(biāo)后,建議支撐設(shè)計時不考慮受循環(huán)荷載時的強度降低系數(shù)。2)提出了基于SRSS內(nèi)力組合原則的拉鏈柱式中心支撐鋼框架結(jié)構(gòu)中拉鏈柱、支撐跨柱的設(shè)計建議,考慮被撐梁可以承受一定的豎向力。對比了按本文建議設(shè)計的拉鏈柱式中心支撐鋼框架結(jié)構(gòu)與懸掛拉鏈柱式中心支撐鋼框架結(jié)構(gòu)的自振特性、用鋼量、多遇及罕遇地震下的動力響應(yīng)等指標(biāo)。綜合考慮用鋼量、結(jié)構(gòu)動力響應(yīng)等指標(biāo)后,建議拉鏈柱、支撐跨柱、被撐梁按本文建議設(shè)計。3)依據(jù)基于循環(huán)次數(shù)的鋼支撐低周疲勞壽命估算方法,對按本文建議設(shè)計的以及懸掛拉鏈柱式中心支撐鋼框架結(jié)構(gòu)在罕遇地震下支撐的低周疲勞性能進(jìn)行了評估,結(jié)果表明兩組算例各層支撐的疲勞損傷程度均很小,正常情況下支撐很難發(fā)生低周疲勞破壞,進(jìn)一步確定了支撐設(shè)計時可以不考慮受循環(huán)荷載時的強度降低系數(shù)。
[Abstract]:The zipper center-braced steel frame structure is a new type of structural system developed on the basis of traditional herringbone center-braced steel frame structure. Zipper column is a vertical force member connecting each braced beam and the intersection point of each braced beam. At present, there are few researches on seismic performance of this kind of systems at home and abroad, and there are no specific design provisions in our code. On the basis of summarizing the research status at home and abroad, this paper studies the seismic design methods of the basic components of the zipper column center-braced steel frame structure (including zipper column, bracing, braced beam). The following is as follows: 1) according to the design method of the steel frame structure with hanging zipper column type center bracing, two sets of comparative examples are designed, in which the strength reduction factor of the bracing is designed according to the strength reduction factor when the cyclic load is taken into account and not taken into account, respectively. This paper analyzes and compares the natural vibration characteristics of an example, the dynamic response of the steel quantity, the frequent occurrence and the rare earthquake, and synthetically considers the steel quantity, the dynamic response of the structure, and so on. It is suggested that the strength reduction factor of braces should not be taken into account in the design of braces under cyclic loading. (2) the design proposal of zipper columns and bracing columns in steel frame structures with central bracing based on the principle of SRSS internal force combination is put forward. Considering the bearing beam can bear a certain vertical force. This paper compares the natural vibration characteristics of the steel frame structure with the zipper column type center braced steel frame structure and the suspended zipper column type steel frame structure, and compares the dynamic response of the steel frame structure with steel quantity, frequent occurrence and rare earthquake, and so on. After considering the steel quantity and the dynamic response of the structure, it is suggested that the zipper column, the braced column and the braced beam should be designed according to the suggestion of this paper. 3) based on the method of estimating the low cycle fatigue life of steel bracing based on the cycle number, The low cycle fatigue behavior of the steel frame structure with suspended zipper column type center braced under rare earthquake is evaluated. The results show that the fatigue damage degree of each layer of braces is very small in two groups of examples. Under normal conditions, the low cycle fatigue failure of bracing is difficult, and the strength reduction factor can be determined without considering the cyclic load in the design of braces.
【學(xué)位授予單位】：河北科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TU391
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本文編號：1997307