本文選題：冷彎薄壁型鋼結(jié)構(gòu)　切入點：墻體支撐　出處：《西安工業(yè)大學》2017年碩士論文

【摘要】：冷彎薄壁型鋼結(jié)構(gòu)具有綠色環(huán)保、施工便捷、抗震性能好等諸多優(yōu)點,在國家提倡大力發(fā)展綠色建筑和裝配式住宅的背景下,已經(jīng)廣泛應(yīng)用于別墅、住宅以及災區(qū)重建中。當今很多研究針對該結(jié)構(gòu)的單個構(gòu)件,對于結(jié)構(gòu)整體的受力性能研究還不夠深入,沒形成一套成熟的理論。目前該種結(jié)構(gòu)體系大都建為兩層或三層,對于四層、五層、六層的結(jié)構(gòu)應(yīng)用很少。由于結(jié)構(gòu)高度的增加,使得結(jié)構(gòu)的受力變形更加復雜,從而給結(jié)構(gòu)造成破壞。墻體是冷彎薄壁型鋼結(jié)構(gòu)中一種重要的抗剪構(gòu)件,合理的墻體支撐形式可以有效增加結(jié)構(gòu)的剛度,控制結(jié)構(gòu)的變形。本文將結(jié)合國內(nèi)外冷彎薄壁型鋼結(jié)構(gòu)的研究現(xiàn)狀,利用大型有限元軟件SAP2000建立三種不同形式的墻體支撐模型,比較不同模型抗震性能的優(yōu)劣。然后采用一種合理墻體支撐形式,分別建立四～六層的冷彎薄壁型鋼結(jié)構(gòu)模型,研究不同地震作用下的結(jié)構(gòu)反應(yīng),主要內(nèi)容和結(jié)論如下:本文對三層無支撐墻體模型、單斜桿支撐墻體模型、人字支撐墻體模型、X形支撐墻體模型進行了動力性能分析,得到了動力性能的基本參數(shù),研究表明:不同形式支撐的墻體對結(jié)構(gòu)自振周期、振型有一定影響,其中X形支撐墻體可以有效降低結(jié)構(gòu)的自振周期,提高結(jié)構(gòu)的剛度,X形支撐墻體相對單桿支撐墻體其結(jié)構(gòu)周期可減少14.7%�；谌N墻體支撐模型整體性能良好的情況下,對三種模型進行8度、9度多遇地震分析,研究不同支撐形式的墻體對結(jié)構(gòu)頂層位移、層間位移角等指標的影響,比較各種墻體支撐抗震性能的優(yōu)劣,結(jié)果表明:三種模型都能滿足抗震要求,其中X形支撐墻體能有效較改善結(jié)構(gòu)受力,降低結(jié)構(gòu)的頂層最大位移和層間位移角,減少結(jié)構(gòu)的變形,適合作為更高結(jié)構(gòu)高度的墻體支撐方式。采用X形支撐墻體建立四～六層冷彎薄壁型鋼結(jié)構(gòu)模型,進行動力性能分析,結(jié)果表明:在該種墻體支撐下,結(jié)構(gòu)整體性能良好,自振周期可以滿足要求,隨著結(jié)構(gòu)高度增加,周期變大,六層結(jié)構(gòu)自振周期比四層增加36.7%。對三種模型進行8度多遇地震分析,結(jié)果表明:在合理選擇墻體的基礎(chǔ)上,結(jié)構(gòu)受力性能合理,整體性良好,當結(jié)構(gòu)建到六層的時候,可以滿足8度多遇地震的抗震要求。
[Abstract]:Cold-formed thin-walled steel structure has many advantages, such as green environmental protection, convenient construction, good seismic performance and so on. It has been widely used in villas, housing and reconstruction of disaster areas under the background of promoting the development of green buildings and prefabricated houses.Nowadays, many researches focus on the single member of the structure, but the research on the mechanical behavior of the whole structure is not enough, and a mature theory has not been formed.At present, this kind of structure system is mostly built into two or three stories, but it is seldom used for four, five and six stories.Because of the increase of the height of the structure, the deformation of the structure is more complicated, thus causing damage to the structure.Wall is an important shear-resistant member in cold-formed thin-walled steel structure. Reasonable wall support can effectively increase the stiffness of the structure and control the deformation of the structure.In this paper, three different types of wall bracing models are established by using the large finite element software SAP2000, and the seismic performance of different models is compared according to the current research situation of cold-formed thin-walled steel structures at home and abroad.Then, a reasonable wall bracing form is used to establish four to six layer cold-formed thin-walled steel structure models, and the main contents and conclusions are as follows: in this paper, the three-story unsupported wall model is studied.The vibration mode has certain influence, among which the X shape supporting wall can effectively reduce the natural vibration period of the structure, and the structure cycle of the X shape supporting wall can be reduced by 14. 7% compared with that of the single bar bracing wall by increasing the stiffness of the structure.Reduce the deformation of the structure, suitable for higher structural height of the wall support.The period of natural vibration of six-story structure increases 36.7 times than that of four layers.The results show that on the basis of reasonable selection of the wall, the structure has reasonable mechanical performance and good integrity. When the structure is built to the sixth floor, it can meet the seismic requirements of the earthquake of 8 degrees.
【學位授予單位】：西安工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TU392.1;TU352.11

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