【摘要】：纖維增強復(fù)合材料作為一種新型材料,因其具有高強、耐腐蝕、輕質(zhì)等優(yōu)點已引起了國內(nèi)外學(xué)者的關(guān)注,其中FRP纖維纏繞管最具代表性。FRP管與混凝土以及鋼筋(或鋼管)等組成的組合結(jié)構(gòu)由于外層FRP管的存在不僅能夠有效的抵御惡劣環(huán)境對混凝土的侵蝕從而提高了結(jié)構(gòu)的耐久性,而且可以約束內(nèi)層混凝土的橫向變形,改善了混凝土的受力性能,從而提高了混凝土的承載能力,這些優(yōu)勢的存在使得這種組合結(jié)構(gòu)成為了當(dāng)前國內(nèi)外學(xué)者研究的熱點。在FRP管混凝土、FRP管鋼筋混凝土等結(jié)構(gòu)研究基礎(chǔ)上,通過大型有限元ABAQUS軟件研究GFRP管素混凝土構(gòu)件、GFRP管鋼筋混凝土構(gòu)件以及GFRP管-混凝土-鋼管組合構(gòu)件的軸心受壓、偏心受壓和受彎的力學(xué)性能,主要的研究內(nèi)容如下：采用有限元方法對GFRP管素混凝土、GFRP管鋼筋混凝土以及GFRP管-混凝土-鋼管三種構(gòu)件進行了軸壓的計算分析,通過荷載-軸向應(yīng)變曲線研究構(gòu)件的受力機理,給出各個特征點處構(gòu)件的應(yīng)力分布情況。為了驗證模型的正確性,將計算得到的結(jié)果與文獻試驗結(jié)果進行對比,兩者吻合較好�；谀Ｐ偷恼_性,計算分析GFRP管厚度、GFRP管纖維纏繞角度、混凝土強度等級、長徑比等設(shè)計參數(shù)對構(gòu)件承載力的影響,得出承載力隨著這些設(shè)計參數(shù)的變化規(guī)律。對GFRP管素混凝土、GFRP管鋼筋混凝土以及GFRP管-混凝土-鋼管三種構(gòu)件分別進行了偏壓和抗彎性能的計算分析。通過與文獻試驗結(jié)果的對比驗證了模型的正確性。另外,計算分析偏心距、鋼管厚度、空心率、長徑比等設(shè)計參數(shù)對構(gòu)件承載力的影響,得出承載力隨著這些設(shè)計參數(shù)的變化規(guī)律。
[Abstract]:As a new type of material, fiber reinforced composites have attracted the attention of scholars at home and abroad because of their advantages of high strength, corrosion resistance and light weight. Among them, FRP filament winding pipe is the most representative. The composite structure composed of FRP pipe, concrete and steel bar (or steel pipe) can not only effectively resist the corrosion of concrete in bad environment, but also improve the durability of the structure because of the existence of outer FRP pipe. Moreover, the lateral deformation of inner layer concrete can be restrained, and the mechanical behavior of concrete can be improved, thus the bearing capacity of concrete can be improved. These advantages make this kind of composite structure become a hot spot of research at home and abroad. Based on the research of FRP pipe concrete, FRP pipe reinforced concrete and so on, the axial compression of GFRP tube concrete member, GFRP tube reinforced concrete member and GFRP pipe concrete-steel tube composite member is studied by using the large finite element ABAQUS software. The main contents of this paper are as follows: finite element method is used to calculate and analyze the axial compression of GFRP tube concrete, GFRP pipe reinforced concrete and GFRP pipe-concrete-steel tube. Based on the load-axial strain curve, the stress distribution at each characteristic point is given. In order to verify the correctness of the model, the calculated results are in good agreement with the experimental results. Based on the correctness of the model, the influence of the design parameters such as GFRP pipe thickness, GFRP pipe filament winding angle, concrete strength grade and aspect ratio on the bearing capacity of the member is calculated and analyzed, and the variation law of bearing capacity with these design parameters is obtained. The GFRP tube concrete, GFRP pipe reinforced concrete and GFRP pipe-concrete-steel tube are calculated and analyzed respectively. The correctness of the model is verified by comparison with the experimental results in literature. In addition, the influence of design parameters such as eccentricity, thickness of steel tube, heart rate of air and ratio of length to diameter on the bearing capacity of members is calculated and analyzed, and the variation law of bearing capacity with these design parameters is obtained.
【學(xué)位授予單位】：東北大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TU398.9

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相關(guān)期刊論文 前1條

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