本文選題：鋼骨—方鋼管混凝土柱 + 外加強環(huán)節(jié)點�。� 參考：《西安科技大學(xué)》2015年碩士論文

【摘要】：鋼骨—方鋼管混凝土柱是由方鋼管內(nèi)填充混凝土和鋼骨所形成的構(gòu)件,它能使混凝土和鋼材發(fā)揮各自的優(yōu)點,通過鋼管約束混凝土和鋼骨使核心混凝土的承載能力有很大程度上的提高,而在核心混凝土中填充鋼骨能使得鋼管不易產(chǎn)生局部屈曲。由于鋼骨—方鋼管混凝土柱與鋼梁的連接表現(xiàn)出良好的綜合性能,所以其在實際工程當(dāng)中具有相當(dāng)廣泛的應(yīng)用范圍。鋼骨—方鋼管混凝土柱與鋼梁節(jié)點也存在著諸多問題,特別是在鋼骨—方鋼管混凝土柱與鋼梁連接的節(jié)點抗震性能還需進一步深入研究。本文考慮了外加強環(huán)的寬度(JQHK)、外加強環(huán)的厚度(JQHH)、軸壓比(ZZYB)和含鋼率(ZHGL)對節(jié)點抗震性能的影響。通過建立的11個有限元模型試件和計算結(jié)果,對結(jié)構(gòu)在循環(huán)荷載作用下的的滯回性能、節(jié)點承載力、剛度退化、強度退化、耗能能力等進行了相對系統(tǒng)的分析。研究結(jié)果表明:當(dāng)結(jié)構(gòu)在循環(huán)荷載作用下時,其滯回曲線飽滿并且呈現(xiàn)出紡錘形,沒有表現(xiàn)出明顯的剛度退化和捏縮現(xiàn)象,所以其表現(xiàn)出了良好的耗能能力;為了使外加強環(huán)式節(jié)點性能能更加有效的發(fā)揮,加強環(huán)板寬度在0.75倍的柱邊長和1.25倍的柱邊長范圍內(nèi)取值時為宜;當(dāng)增大外加強環(huán)厚度,節(jié)點區(qū)承載力明顯提高,為了使加強環(huán)受力較好并且考慮經(jīng)濟時,加強環(huán)的厚度應(yīng)該取梁翼緣厚度相同;當(dāng)鋼管混凝土柱柱端軸壓力的增大時,節(jié)點的承載力也會有相應(yīng)提高,為了使節(jié)點耗能能力相對較好,軸壓比應(yīng)該控制在0.4~0.8之間;當(dāng)鋼管壁厚有所增加時,節(jié)點的承載力也相應(yīng)得到一定提高,但是結(jié)構(gòu)的耗能能力在鋼管壁超過一定厚度時增加很小,為了經(jīng)濟期間,所以含鋼率應(yīng)控制在0.126~0.167之間為宜。本文深入地分析了鋼骨—方鋼管混凝土柱與鋼梁節(jié)點的抗震性能,得出的結(jié)論為鋼骨—鋼管混凝土結(jié)構(gòu)加強環(huán)式節(jié)點的的研究應(yīng)用提供了有價值的數(shù)據(jù)和參考依據(jù)。
[Abstract]:The steel-square concrete-filled steel tube column is a component formed by the filling of concrete and steel in a square steel tube, which enables concrete and steel to play their respective advantages. The load-bearing capacity of the core concrete can be greatly improved by confined concrete with steel tube and steel bone, while the local buckling of the steel pipe is not easy to be caused by filling the steel bone in the core concrete. Because of the good comprehensive performance of the connection between concrete-filled steel tubular column and steel beam, it has a wide range of applications in practical engineering. There are also many problems in the connection of concrete-filled steel tubular column and steel beam, especially the seismic behavior of the connection between steel reinforced concrete filled steel column and steel beam needs further study. In this paper, the effects of the width of the outer stiffening ring, the thickness of the outer strengthening ring, the axial compression ratio ZZYB and the steel content ratio on the seismic behavior of the joints are considered. Based on the 11 finite element model specimens and the calculated results, the hysteretic behavior, joint bearing capacity, stiffness degradation, strength degradation and energy dissipation capacity of the structure under cyclic load are analyzed systematically. The results show that the hysteretic curve of the structure is full and spindle-shaped under cyclic load, and it does not exhibit obvious stiffness degradation and pinch phenomenon, so it shows good energy dissipation capacity. In order to make the performance of the outer strengthened ring joints more effective, it is appropriate to select the values of the width of the ring plate in the range of 0.75 times of column side length and 1.25 times of column side length, and the bearing capacity of the joint area is obviously increased when the outer strengthened ring thickness is increased. In order to make the strengthened ring bear well and consider the economy, the thickness of the strengthened ring should be the same as the thickness of the beam flange, and the bearing capacity of the joint will also be increased when the axial pressure of the end of the column increases. In order to make the joint energy dissipation capacity relatively good, the axial compression ratio should be controlled in the range of 0.4 ~ 0.8, and when the wall thickness of steel pipe increases, the bearing capacity of the joint will be improved accordingly. However, the energy dissipation capacity of the structure is very small when the wall of the steel pipe exceeds a certain thickness. For the sake of economic period, the steel content ratio should be controlled in the range of 0.126 ~ 0.167. In this paper, the seismic behavior of concrete-filled steel tubular columns and steel beam joints is deeply analyzed, and the conclusion provides valuable data and reference basis for the research and application of reinforced ring joints of steel-reinforced concrete filled steel tube structures.
【學(xué)位授予單位】：西安科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TU398.9;TU352.11

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