本文選題：高強鋼筋　切入點：高強混凝土　出處：《沈陽建筑大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：近年來,高強鋼筋和高強度混凝土已經(jīng)在結(jié)構(gòu)工程中得到應(yīng)用。高強鋼筋的強度較普通鋼筋有很大的提高,但其沒有明顯的屈服點。高強混凝土較普通混凝土的強度同樣得到很大的提升,但是隨著混凝土強度的提高,混凝土的脆性越來越明顯,這對結(jié)構(gòu)是不利的。針對高強鋼筋高強混凝土柱在強震作用下的抗震性能,國內(nèi)外很多學(xué)者做了大量的相關(guān)研究,并取得了一定的成果。但針對高強鋼筋高強混凝土短柱的研究尚有不足,尤其是在地震荷載作用下時,配置高強鋼筋的高強混凝土短柱的抗震性能及破壞機理與普通混凝土短柱有一定的區(qū)別。本文在理論分析的基礎(chǔ)上,進行了相關(guān)的試驗研究,著重研究了配置高強鋼筋的高強混凝土短柱在往復(fù)荷載作用下的破壞特點及抗震性能。具體工作包括以下幾個方面：(1)綜述了近年來國內(nèi)外在普通混凝土短柱和高強混凝土短柱在地震荷載作用下的抗震性能的研究概況。(2)完成了八根配有1420級預(yù)應(yīng)力鋼棒(簡稱PC鋼棒)作為混凝土短柱的縱筋和箍筋的高強混凝土短柱在低周往復(fù)荷載作用下的抗震性能試驗研究。通過擬靜力試驗方法研究配置高強鋼筋的高強混凝土短柱的滯回特性及影響其抗震性能的相關(guān)因素。分析了各參數(shù)包括混凝土強度、箍筋強度、箍筋間距和軸壓比等因素對高強混凝土短柱的延性和抗震性能的影響,討論了試件的滯回曲線、骨架曲線、箍筋和縱筋的應(yīng)力-應(yīng)變曲線的特征,并對試驗結(jié)果進行了分析和比較。試驗結(jié)果表明：在地震荷載作用下的,配置高強鋼筋的高強混凝土短柱發(fā)生彎曲破壞。(3)結(jié)合中國現(xiàn)行的《混凝土結(jié)構(gòu)設(shè)計規(guī)范》(GB 50010-2010)及相關(guān)文獻中柱子的正截面承載力計算方法,并結(jié)合試驗結(jié)果,建議對配置高強鋼筋的高強混凝土短柱的正截面承載力方法進行改善。(4)對配置高強鋼筋的高強混凝土短柱抗震性能的進一步研究給出了建議,為以后更深入的研究打下基礎(chǔ)。
[Abstract]:In recent years, high strength steel bars and high strength concrete have been used in structural engineering. But it has no obvious yield point. The strength of high strength concrete is also greatly improved compared with ordinary concrete, but with the increase of concrete strength, the brittleness of concrete becomes more and more obvious. In view of the seismic behavior of high-strength reinforced high-strength concrete columns under strong earthquake, many scholars at home and abroad have done a lot of relevant research. Some achievements have been made. However, the research on high strength reinforced high strength concrete short columns is still insufficient, especially under earthquake load. The seismic behavior and failure mechanism of high strength reinforced concrete short columns are different from that of ordinary concrete short columns. The failure characteristics and seismic behavior of high strength concrete short columns with high strength reinforcement under reciprocating load are studied emphatically. The concrete work includes the following aspects: 1) A summary of the short columns and high strength concrete columns at home and abroad in recent years is given. Research Survey of Seismic behavior of strong concrete short columns under earthquake load. (2) eight high strength concrete short columns with 1420 grade prestressed steel bars (PC bars) as longitudinal reinforcement and stirrups in low cycle have been completed. The hysteretic characteristics of high strength concrete short columns with high strength reinforcement and the relative factors affecting their seismic behavior are studied by pseudo static test method. The parameters including concrete strength are analyzed. The effects of stirrups strength, stirrups spacing and axial compression ratio on the ductility and seismic behavior of high strength concrete short columns are discussed. The hysteretic curves, skeleton curves, stress-strain curves of stirrups and longitudinal bars are discussed. The experimental results are analyzed and compared. The experimental results show that: under the action of earthquake load, High strength concrete short columns with high strength steel bars are subjected to flexural failure. 3) combined with the present Code for Design of concrete structures in China (GB50010-2010) and the calculation method of normal section bearing capacity of columns in related literature, and combined with the test results, It is suggested that the method of normal section bearing capacity of high strength concrete short columns with high strength steel bars be improved. 4) the further study on seismic behavior of high strength concrete short columns with high strength steel bars is suggested, which will lay a foundation for further research.
【學(xué)位授予單位】：沈陽建筑大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TU375;TU352.11

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