本文關(guān)鍵詞：預(yù)應(yīng)力離心鋼管混凝土管樁（PSC樁）抗彎性能研究　出處：《合肥工業(yè)大學(xué)》2017年碩士論文　論文類(lèi)型：學(xué)位論文

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【摘要】：離心混凝土鋼管樁(簡(jiǎn)稱(chēng)TSC樁)由于其特殊的制作工藝,既能充分發(fā)揮混凝土的承壓能力,又能利用鋼材的抗變形、抗裂等能力。為結(jié)合現(xiàn)有管樁制作工藝開(kāi)發(fā)衍生產(chǎn)品,進(jìn)一步探索離心混凝土鋼管樁的力學(xué)性能,對(duì)離心混凝土鋼管樁內(nèi)增設(shè)預(yù)應(yīng)力鋼棒,經(jīng)蒸汽養(yǎng)護(hù)制成的預(yù)應(yīng)力離心鋼管混凝土管樁(簡(jiǎn)稱(chēng)PSC樁)進(jìn)行抗彎性能試驗(yàn)研究。本文進(jìn)行了兩根PSC樁的抗彎性能試驗(yàn),探究PSC樁剛度、強(qiáng)度、延性以及預(yù)應(yīng)力鋼棒對(duì)其抗彎性能的影響。試驗(yàn)表明PSC樁受彎具有明顯的彈塑性變形特征,彈性變形能力和塑性變形能力均良好。與TSC樁相比,PSC樁的抗彎極限承載力提升較多,說(shuō)明PSC樁具有良好的抗彎性能。參照試驗(yàn),運(yùn)用有限元軟件ABAQUS對(duì)PSC樁的進(jìn)行模擬,分析結(jié)果與試驗(yàn)實(shí)測(cè)值吻合度較好,表明建立的模型可靠�；谒�(yàn)證的模型,進(jìn)一步分析鋼管壁厚和強(qiáng)度、混凝土壁厚和強(qiáng)度、預(yù)應(yīng)力鋼棒配筋面積、管樁外徑對(duì)PSC樁抗彎性能的影響,發(fā)現(xiàn)環(huán)形截面含鋼率和管樁外徑是影響PSC樁抗彎性能的主要因素。參考PHC樁的軸心抗壓承載力和TSC樁的抗彎極限承載力計(jì)算公式,對(duì)PSC樁的相關(guān)抗彎參數(shù)進(jìn)行線性擬合,推導(dǎo)抗彎極限承載力計(jì)算式,驗(yàn)算誤差較小,可以作為PSC樁抗彎極限承載力的估算參考。最后在總結(jié)試驗(yàn)和有限元分析的基礎(chǔ)上,提出對(duì)后續(xù)研究的展望與建議。
[Abstract]:Centrifugal concrete filled steel pipe pile (TSC pile) can not only give full play to the bearing capacity of concrete, but also make use of the deformation resistance of steel due to its special manufacturing technology. In order to explore the mechanical properties of centrifugal concrete steel tube pile, the prestressed steel bar is added to the centrifugal concrete steel tube pile in order to develop the derivative product combined with the existing pipe pile making technology. The flexural behavior of prestressed centrifugal concrete-filled steel tube pile (PSC pile) made by steam curing is studied. In this paper, the flexural behavior of two PSC piles is tested to explore the stiffness and strength of PSC pile. Experiments show that PSC pile has obvious elastic-plastic deformation characteristics, elastic deformation ability and plastic deformation ability are good, compared with TSC pile. The flexural ultimate bearing capacity of PSC pile is much higher, which shows that PSC pile has good flexural performance. According to the test, the finite element software ABAQUS is used to simulate the PSC pile. The results of the analysis are in good agreement with the measured values, indicating that the established model is reliable. Based on the verified model, the wall thickness and strength of steel pipe, the thickness and strength of concrete wall, and the area of reinforcement of prestressed steel bars are further analyzed. Influence of external diameter of pipe pile on flexural behavior of PSC pile. It is found that the steel content of annular section and the outer diameter of pipe pile are the main factors that affect the flexural behavior of PSC pile. Referring to the axial compressive capacity of PHC pile and the calculation formula of ultimate flexural bearing capacity of TSC pile. According to the linear fitting of the bending parameters of PSC pile, the calculation formula of ultimate bearing capacity of PSC pile is deduced, and the error of checking calculation is small. It can be used as a reference for the estimation of ultimate bearing capacity of PSC piles. Finally, based on the summary of tests and finite element analysis, the prospects and suggestions for further study are put forward.
【學(xué)位授予單位】：合肥工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：TU473.13

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本文編號(hào)：1386857