【摘要】：預(yù)應(yīng)力裝配混凝土結(jié)構(gòu)即用高強(qiáng)預(yù)應(yīng)力鋼筋或鋼絞線通過施加預(yù)應(yīng)力把預(yù)制混凝土構(gòu)件在施工現(xiàn)場裝配起來,這種結(jié)構(gòu)兼有預(yù)應(yīng)力混凝土和裝配式結(jié)構(gòu)的優(yōu)點(diǎn)。與普通混凝土結(jié)構(gòu)相比,它具有抗裂性好、撓度小、變形恢復(fù)能力強(qiáng)、震后結(jié)構(gòu)的殘余變形小的特點(diǎn),能夠充分利用高強(qiáng)混凝土材料減輕自重、工業(yè)化生產(chǎn)方式更加節(jié)能環(huán)保、現(xiàn)場濕作業(yè)少能夠有效提高工作效率縮短施工工期。在課題組之前工作的基礎(chǔ)上對不同預(yù)壓應(yīng)力和不同梁配筋率的預(yù)壓裝配式節(jié)點(diǎn)試件的承載力進(jìn)行研究,主要選取邊節(jié)點(diǎn)試件作為研究對象,涉及試件16個(gè),試件均為足尺試件,對擬靜力荷載作用下,試件的承載力及抗震性能進(jìn)行研究。結(jié)果表明:預(yù)壓應(yīng)力對試件的承載力具有顯著影響,在一定范圍內(nèi),隨著預(yù)壓應(yīng)力的增大,裝配節(jié)點(diǎn)試件承載力增加明顯;但梁配筋率對裝配式試件承載力影響效果不顯著,在一定范圍內(nèi),隨著配筋率的提高現(xiàn)澆試件承載力提高明顯,但附加角鋼板和附加阻尼器的裝配式節(jié)點(diǎn)試件,承載力增加不明顯。附加阻尼器試件的耗能能力較附加角鋼板試件更強(qiáng),預(yù)壓應(yīng)力的增大會降低節(jié)點(diǎn)試件的耗能能力,而增加梁配筋率則會增強(qiáng)試件的耗能能力。在一定范圍內(nèi),增加試件的配筋率和預(yù)壓應(yīng)力有助于提高試件的整體剛度。在試驗(yàn)和理論計(jì)算的基礎(chǔ)上,對節(jié)點(diǎn)的整體性能進(jìn)行分析,建議采用混凝土設(shè)計(jì)規(guī)范中相關(guān)內(nèi)容對預(yù)制梁柱節(jié)點(diǎn)試件進(jìn)行計(jì)算,計(jì)算結(jié)果與實(shí)際值相符合。文中設(shè)計(jì)的附加角鋼板和附加阻尼器耗能裝置,能夠在一定程度上增加節(jié)點(diǎn)試件的抗震性能,可以在工程實(shí)際中進(jìn)行推廣使用。
[Abstract]:Prestressed assembly concrete structure is that prefabricated concrete members are assembled in the construction site by applying prestressing force with high strength prestressed steel bar or steel strand. This kind of structure has the advantages of both prestressed concrete and prefabricated structure. Compared with ordinary concrete structure, it has the characteristics of good crack resistance, small deflection, strong deformation recovery ability and small residual deformation of post-earthquake structure. It can make full use of high-strength concrete materials to reduce self-weight, and the industrial production mode is more energy saving and environmental protection. Less wet work on site can effectively improve the working efficiency and shorten the construction period. On the basis of the work done before the research group, the bearing capacity of the preloaded fabricated joint specimens with different precompression stress and different beam reinforcement ratio was studied. The edge joint specimens were selected as the research objects, 16 specimens were involved, and all the specimens were full-scale specimens. The bearing capacity and seismic behavior of the specimen under pseudo static load are studied. The results show that the preloading stress has a significant effect on the bearing capacity of the specimen. In a certain range, with the increase of preloading stress, the bearing capacity of the assembly joint specimen increases obviously, but the effect of beam reinforcement ratio on the bearing capacity of the assembled specimen is not significant. In a certain range, the bearing capacity of cast-in-situ specimens increases obviously with the increase of reinforcement ratio, but the bearing capacity of fabricated joint specimens with angle steel plates and dampers is not obviously increased. The energy dissipation capacity of the specimens with additional dampers is stronger than that of the steel plate specimens with additional angles. The increase of preloading stress will reduce the energy dissipation capacity of the joint specimens, while the energy dissipation capacity of the specimens will be enhanced by increasing the reinforcement ratio of the beams. In a certain range, increasing the reinforcement ratio and preloading stress will help to improve the overall stiffness of the specimen. On the basis of experiment and theoretical calculation, the whole performance of the joints is analyzed, and it is suggested that the precast Liang Zhu joints should be calculated by using the relevant contents of the concrete design code. The calculated results are in accordance with the actual values. The additional angle steel plate and the additional damper energy dissipation device designed in this paper can increase the seismic performance of the joint specimen to a certain extent and can be popularized and used in engineering practice.
【學(xué)位授予單位】：華北理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TU378.4

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