本文關(guān)鍵詞：鋼骨—鋼管混凝土柱抗震性能、抗彎剪承載力研究　出處：《沈陽建筑大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 鋼骨-鋼管混凝土柱 軸壓比 含骨率 滯回性能 耗能 剛度退化 延性 剪跨比 抗剪承載力

【摘要】：鋼骨-鋼管混凝土柱(circular steel tube composite columns filled with steel reinforced concrete)是一種新型組合結(jié)構(gòu)構(gòu)件,在鋼管混凝土組合結(jié)構(gòu)基礎(chǔ)上做了進(jìn)一步發(fā)展,通過在柱子四周設(shè)置角鋼(鋼骨),能有效提高柱子的承載能力和延性性能,針對(duì)這種新型結(jié)構(gòu)已經(jīng)做過了大量實(shí)驗(yàn)和模擬工作。國(guó)內(nèi)對(duì)鋼骨—鋼管混凝土柱的研究尚少,因此,有必要對(duì)其性能進(jìn)行進(jìn)一步的研究,以更好的應(yīng)用于工程實(shí)際中。鋼骨—鋼管混凝土組合柱結(jié)構(gòu)使鋼筋混凝土柱與鋼管混凝土柱兩者有機(jī)結(jié)合,充分集成二者優(yōu)點(diǎn)的同時(shí),又有一定發(fā)展。在同樣承載力條件下,很大程度上減小了構(gòu)件的截面尺寸,提高了柱子延性同時(shí)也提高了其承載能力,有效的提高了框架結(jié)構(gòu)柱的軸壓比限值和抗震能力。筆者在試驗(yàn)研究的基礎(chǔ)上,通過ABAQUS模擬,研究了含骨率和軸壓比不同時(shí)對(duì)構(gòu)件承載力和變形能力的影響,為鋼骨—鋼管混凝土柱的進(jìn)一步研究和應(yīng)用提供了理論依據(jù)�？拐鹦阅芊矫�,通過對(duì)ABAQUS模擬結(jié)果的處理,得到了分別以含骨率、軸壓比為控制變量下的荷載-位移曲線、強(qiáng)度及剛度退化曲線。通過對(duì)比不同軸壓比和不同含骨率時(shí)得出的數(shù)劇,可以得出以下結(jié)論：鋼骨—鋼管混凝土柱表現(xiàn)出了較高的承載能力,柱的破壞屬于壓彎型破壞,即使在最不利荷載作用下荷載—位移曲線的圖形依然非常穩(wěn)定而沒有突變現(xiàn)像,曲線外輪廓飽滿而成梭形,無捏縮收攏現(xiàn)象,表現(xiàn)出其較好的耗能能力。通過對(duì)含骨變化而得到不同骨架曲線的對(duì)比分析得到,含骨率是影響構(gòu)件承載力的主要因素之隨著含骨率的增加,構(gòu)件承載力得到明顯的提生；此外,軸壓比也是影響構(gòu)件骨架曲線的主要因素,軸壓比越高時(shí)骨架曲線下降段的斜率越大越陡,構(gòu)件的延性自然就越差,可見過大的軸壓比對(duì)抗震是非常不利的�？辜粜阅芊矫�,現(xiàn)有的一些普通鋼筋混凝土構(gòu)件剪彎試驗(yàn)表明、：當(dāng)剪跨比大于2時(shí),構(gòu)件通常會(huì)發(fā)生由于壓、彎、剪作用而導(dǎo)致的縱向鋼筋的粘著破壞,伴隨著混凝土保護(hù)層剝落,進(jìn)而導(dǎo)致承載能力的迅速下降。而鋼管混凝土因鋼管的存在使構(gòu)件抗延性大幅提高,會(huì)發(fā)生破壞荷載較高的彎曲型破壞而被拉斷,且不會(huì)有保護(hù)層的剝落問題。鋼骨—鋼管混凝土的力學(xué)性能方面與鋼管混凝土的有很大相擬之處,所以只進(jìn)行剪跨比小于等于2時(shí)的短柱受剪承載力的研究,通過控制改變含骨率,剪跨比,軸壓比,套箍指標(biāo)來分析變量對(duì)柱承載力的變化。國(guó)內(nèi)對(duì)鋼骨—鋼管混凝土柱的研究尚少,因此,有必要對(duì)其性能進(jìn)行進(jìn)一步的研究,為鋼骨—鋼管混凝土柱的進(jìn)一步研究和應(yīng)用提供了理論依據(jù),以期更好的應(yīng)用于工程實(shí)際中。
[Abstract]:Steel-reinforced concrete filled steel tube column (. Circular steel tube composite columns filled with steel reinforced. Create). It is a new type of composite structure. Based on the composite structure of concrete-filled steel tube (CFST), the bearing capacity and ductility of the columns can be effectively improved by installing angle steel around the columns. A lot of experimental and simulation work has been done for this new structure. There are few researches on steel-reinforced concrete filled steel tube columns in China, so it is necessary to further study its performance. In order to be better applied in engineering practice, the steel-reinforced concrete filled steel tubular column structure makes the reinforced concrete column and the steel tube concrete column combine organically, and fully integrate the advantages of the two at the same time. In the same condition of bearing capacity, the section size of the member is reduced to a great extent, the ductility of the column is improved, and the bearing capacity of the column is also improved. The limit value of axial compression ratio and seismic capacity of frame structure column are improved effectively. Based on the experimental research, the author simulates by ABAQUS. The effects of different ratio of bone and axial compression on the bearing capacity and deformation capacity of the members are studied, which provides a theoretical basis for the further study and application of steel-filled steel tube concrete filled columns. By processing the ABAQUS simulation results, the load-displacement curves with the ratio of bone content and axial compression ratio as control variables are obtained. Strength and stiffness degradation curve. By comparing the different axial compression ratio and different ratio of bone, we can draw the following conclusion: steel steel-filled steel tube concrete column shows high bearing capacity. Even under the most unfavorable load, the pattern of load-displacement curve is still very stable and has no abrupt phenomenon, the contour of the curve is full and fusiform, and there is no squeezing and closing phenomenon. Through the comparison and analysis of different skeleton curves, it is concluded that the ratio of bone is one of the main factors affecting the bearing capacity of components with the increase of bone content. The bearing capacity of the members is obviously increased; In addition, the axial compression ratio is also the main factor affecting the skeleton curve, the higher the axial compression ratio, the bigger the slope of the descending section of the skeleton curve is, and the worse the ductility of the component is. It can be seen that too large axial compression ratio is very unfavorable to earthquake resistance. In terms of shear performance, some existing shear bending tests of reinforced concrete members show that when the shear span ratio is greater than 2:00, the members usually have bending due to compression. The shear failure of longitudinal steel bar is accompanied by the spalling of concrete cover, which leads to the rapid decline of bearing capacity. The ductility of concrete filled steel tube (CFST) is greatly improved because of the existence of steel tube. Bending failure with high failure load will be broken and there will be no peeling off of the protective layer. The mechanical properties of steel-filled steel tubular concrete are closely related to that of concrete filled steel tube. Therefore, the shear bearing capacity of short columns with shear span ratio less than or equal to 2:00 is studied, and the ratio of shear to span and axial compression is controlled by changing the ratio of bone content, shear span ratio and axial compression ratio. The hoop index is used to analyze the variation of the bearing capacity of the column. There is little research on the steel-reinforced concrete filled steel tube column in China, so it is necessary to further study its performance. It provides a theoretical basis for the further research and application of steel-reinforced concrete filled steel tube columns, and is expected to be better applied in engineering practice.
【學(xué)位授予單位】：沈陽建筑大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TU398.9

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