本文選題：預(yù)應(yīng)力 + CFRP-PCPs復(fù)合筋��； 參考：《廣西科技大學(xué)》2015年碩士論文

【摘要】：本文提出使用CFRP預(yù)應(yīng)力棱柱體carbon fibre-reinforced-polymers prestressed concrete prisms(CFRP-PCPs)加固鋼梁方法。CFRP-PCPs筋是指在截面較小的高強(qiáng)棱柱體(PCPs)面積中心埋植預(yù)應(yīng)力CFRP筋,待高強(qiáng)達(dá)到設(shè)計(jì)強(qiáng)度后,預(yù)應(yīng)力CFRP筋與高強(qiáng)棱柱體相互組合形成截面尺寸較小適合于軸心受拉的CFRP-PCPs筋。由于預(yù)應(yīng)力的影響,使用CFRP-PCPs作為受力筋可以推遲CFRP-PCPs筋受彎構(gòu)件在正常使用階段荷載下的構(gòu)件裂縫開(kāi)展,減小撓度及裂縫寬度。該筋即可作為受力筋直接粘貼與鋼梁腹板與下翼緣交叉處,即形成一種新型CFRP-PCPs筋復(fù)合筋加固鋼梁結(jié)構(gòu)。本文對(duì)CFRP-PCPs筋加固鋼梁結(jié)構(gòu)進(jìn)行系列試驗(yàn)研究及理論分析。主要的研究工作如下:(1)完成了CFRP-PCPs筋生產(chǎn)材料,制作設(shè)備以及流程的研究,成功的制作出CFRP-PCPs筋。(2)進(jìn)行了6根CFRP-PCPs筋復(fù)合筋加固鋼梁加載試驗(yàn)研究,與未加固鋼梁相比,采用CFRP-PCPs筋復(fù)合筋加固鋼梁具有以特點(diǎn):試件破壞時(shí)CFRP-PCPs筋中的CFRP筋的應(yīng)力水平明顯提高,加固鋼梁的極限承載力提高;可較好的改善加固鋼梁在正常使用階段性能,提高加固梁的剛度,延緩開(kāi)裂,減小裂縫寬度。(3)對(duì)CFRP-PCPs筋加固鋼梁正截面按可能的破壞形態(tài)進(jìn)行了歸納分類(lèi),建立了承載力計(jì)算及其判斷方法,并在此基礎(chǔ)上提出了CFRP-PCPs筋加固鋼梁撓度等的設(shè)計(jì)建議。本文的研究成果將為CFRP-PCPs筋結(jié)構(gòu)在實(shí)際工程的應(yīng)用提供科學(xué)依據(jù),并為CFRP-PCPs筋結(jié)構(gòu)的相關(guān)規(guī)范的編制提供參考。
[Abstract]:In this paper, the method of strengthening steel beam with CFRP prestressing prism carbon fibre-reinforced-polymers prestressed concrete prisms (CFRP-PCPs). CFRP-PCPs is that the prestressed CFRP tendons are embedded in the center of the area of the high-strength prism with smaller section, and when the high strength reaches the design strength, The prestressing CFRP tendons combined with high strength prisms form a small section size suitable for axial tension of CFRP-PCPs tendons. Because of the influence of prestress, using CFRP-PCPs as the stress bar can delay the crack development of the flexural members with CFRP-PCPs tendons under normal service stage, and reduce the deflection and crack width. The steel bar can be directly bonded to the steel beam web plate and the lower flange as a stress bar, that is to say, a new type of steel beam reinforced with CFRP-PCPs tendons is formed. In this paper, a series of experimental research and theoretical analysis of steel beam structure strengthened with CFRP-PCPs bars are carried out. The main research work is as follows: (1) finished the research on the production material, equipment and flow of CFRP-PCPs bars, and successfully made CFRP-PCPs tendons. 2) the loading tests of 6 CFRP-PCPs tendons reinforced steel beams are carried out, which are compared with those of unstrengthened steel beams. The characteristics of strengthening steel beams with CFRP-PCPs tendons are as follows: the stress level of CFRP bars in CFRP-PCPs bars is obviously increased and the ultimate bearing capacity of strengthened steel beams is increased when the specimens are destroyed, and the stage energy of strengthening steel beams in normal service can be better improved. The normal section of steel beams strengthened with CFRP-PCPs bars is classified according to the possible failure patterns, and the calculation of bearing capacity and its judgment method are established, which can improve the stiffness of strengthened beams, delay cracking and reduce the width of cracks. On this basis, the design suggestions of the deflection of steel beams strengthened with CFRP-PCPs bars are put forward. The research results in this paper will provide a scientific basis for the application of CFRP-PCPs reinforcement structure in practical engineering, and provide a reference for the compilation of relevant codes for CFRP-PCPs reinforcement structure.
【學(xué)位授予單位】：廣西科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：TU391

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本文編號(hào)：1919366