本文關(guān)鍵詞： ANSYS 核心混凝土 高徑比 空心率　出處：《東北石油大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：GFRP管-混凝土-鋼管組合柱是由GFRP外管、內(nèi)置鋼管和兩者之間的混凝土三部分組成的新型組合構(gòu)件,它兼具雙GFRP管混凝土組合柱、雙鋼管混凝土組合柱和GFRP管實(shí)心混凝土柱三者的優(yōu)點(diǎn)于一身。GFRP管通過約束核心混凝土從而提高組合構(gòu)件的承載力,同時(shí)能夠有效的保護(hù)混凝土和鋼管,具有良好的延性和抗震性能。從而可以看出,該組合結(jié)構(gòu)具有廣闊的應(yīng)用前景。目前,對(duì)于GFRP管-混凝土-鋼管組合長柱的研究相對(duì)比較匱乏,為研究GFRP管-混凝土-鋼管組合長柱軸心受壓下的力學(xué)性能,本文將建立GFRP管-混凝土-鋼管組合長柱的有限元模型,在驗(yàn)證了模型正確性的基礎(chǔ)上,深入研究空心率、高徑比、混凝土強(qiáng)度、GFRP管壁厚度這四種影響參數(shù)對(duì)組合構(gòu)件力學(xué)性能的影響。主要研究工作包括:1.對(duì)GFRP管-混凝土-鋼管組合柱進(jìn)行截面形式設(shè)計(jì)。2.通過有限元軟件ANSYS,結(jié)合試驗(yàn)的構(gòu)件參數(shù),建立與之對(duì)應(yīng)的GFRP管-混凝土-鋼管組合柱的有限元模型,通過對(duì)比極限承載力、荷載-位移曲線來驗(yàn)證選取的本構(gòu)關(guān)系和建模方法的正確性。3.拓展參數(shù),確定所要進(jìn)行研究工況的試件的參數(shù),建立有限元模型,得到該結(jié)構(gòu)形式在不同空心率、不同高徑比、不同混凝土強(qiáng)度、不同GFRP管壁厚度下的承載力變化規(guī)律。4.基于有限元模擬所獲得的結(jié)果,最終確定以上四個(gè)因素,對(duì)GFRP管-混凝土-鋼管組合長柱軸心受壓下極限承載力的影響規(guī)律。5.確定合理的高徑比、混凝土強(qiáng)度、空心率和GFRP管壁厚度。為工程設(shè)計(jì)提出建議。
[Abstract]:GFRP tube-concrete-steel tube composite column is a new type of composite member composed of GFRP outer pipe, built-in steel pipe and concrete between them. It has double GFRP pipe concrete composite column. The advantages of double-filled steel tube concrete composite column and GFRP tube solid concrete column are that. GFRP pipe can effectively protect concrete and steel tube by restricting the core concrete to improve the bearing capacity of the composite member. It can be seen that the composite structure has a broad application prospect. At present, the research of GFRP pipe concrete steel tube composite long column is relatively scarce. In order to study the mechanical properties of GFRP pipe-concrete-steel tube composite columns under axial compression, the finite element model of GFRP pipe-concrete-steel tube composite columns is established in this paper. On the basis of verifying the correctness of the model, the hollow rate is studied in depth. Ratio of height to diameter, The influence of four influence parameters of concrete strength and wall thickness on the mechanical properties of composite members. The main research work includes: 1. The section form design of GFRP tube-concrete-steel pipe composite column .2.Through finite element software ANSYS, the junction is obtained. Component parameters of the combined test, The corresponding finite element model of GFRP tube-concrete-steel tube composite column is established. By comparing ultimate bearing capacity and load-displacement curve, the correctness of the selected constitutive relation and modeling method is verified. The parameters of the specimen are determined, the finite element model is established, and the structure forms are obtained in different hollow ratio, different aspect ratio, different concrete strength. The variation of bearing capacity under different thickness of GFRP pipe wall. 4. Based on the results obtained by finite element simulation, the above four factors are finally determined. The effect of axial compression on ultimate bearing capacity of GFRP pipe-concrete-steel tube composite long column is studied. 5. Reasonable ratio of height to diameter, concrete strength, hollow ratio and thickness of GFRP pipe wall are determined. Suggestions for engineering design are put forward.
【學(xué)位授予單位】：東北石油大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TU398.9
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本文編號(hào)：1532770