【摘要】：混合結(jié)構(gòu)體系較多地被運(yùn)用在高層及超高層結(jié)構(gòu)中,實(shí)際的工程運(yùn)用中仍存在著需要解決的問(wèn)題。目前國(guó)內(nèi)外關(guān)于型鋼混凝土的研究主要集中在型鋼混凝土框架節(jié)點(diǎn)的抗震性能研究、型鋼混凝土框架結(jié)構(gòu)的抗震性能的研究、型鋼混凝土抗火方面的研究這三個(gè)方面。對(duì)于簡(jiǎn)化型鋼混凝土節(jié)點(diǎn)設(shè)計(jì)與提出新的節(jié)點(diǎn)構(gòu)造形式以簡(jiǎn)化施工過(guò)程方面的研究較少,對(duì)型鋼混凝土梁柱節(jié)點(diǎn)核心區(qū)的抗剪性能和抗剪承載力的計(jì)算公式還有待于進(jìn)一步研究。我國(guó)現(xiàn)有的型鋼混凝土梁柱節(jié)點(diǎn)的設(shè)計(jì)依然采用在型鋼梁柱腹板上開(kāi)洞來(lái)穿過(guò)箍筋的做法,這樣不但施工較為困難,而且削弱了型鋼的腹板,對(duì)節(jié)點(diǎn)的承載力有一定的影響。本文在參考現(xiàn)有型鋼混凝土梁柱節(jié)點(diǎn)構(gòu)造形式的基礎(chǔ)上,結(jié)合國(guó)內(nèi)外關(guān)于型鋼混凝土節(jié)點(diǎn)核心區(qū)抗剪機(jī)理的理論,設(shè)計(jì)了一種在核心區(qū)設(shè)置隔板的型鋼混凝土粱柱節(jié)點(diǎn)(試件SRCJ-1),并進(jìn)行抗震性能試驗(yàn)研究。同時(shí),設(shè)計(jì)了一種按照傳統(tǒng)做法的構(gòu)件和-種核心區(qū)不配置箍筋的構(gòu)件(分別為試件SRCJ-2和試件SRCJ-3),同樣對(duì)這兩種構(gòu)件進(jìn)行了低周往復(fù)加載試驗(yàn)。試件設(shè)計(jì)均遵照“強(qiáng)梁弱柱弱節(jié)點(diǎn)”的原則進(jìn)行,通過(guò)試驗(yàn)得到各構(gòu)件的裂縫開(kāi)展與分布規(guī)律、梁端荷載位移曲線(xiàn)、構(gòu)件主要應(yīng)變。根據(jù)試驗(yàn)結(jié)果,分析得到了結(jié)構(gòu)的破壞機(jī)理、粱端骨架曲線(xiàn)、屈服荷載與極限荷載、位移延性系數(shù)與耗能性能、強(qiáng)度衰減曲線(xiàn)與剛度退化曲線(xiàn)以及節(jié)點(diǎn)核心區(qū)主要應(yīng)變發(fā)展規(guī)律。通過(guò)對(duì)這些內(nèi)容的分析,我們得到了以下結(jié)論：所有構(gòu)件的破壞形式均為核心區(qū)剪切斜壓破壞,與設(shè)計(jì)目的相符；試件SRCJ-2與SRCJ-3的屈服荷載、極限荷載及抗震性能均基本能夠保持一致,試件SRCJ-1較兩者略低；試件SRCJ-2與試件SRCJ-3強(qiáng)度衰減與剛度退化趨勢(shì)兩者吻合較好,試件SRCJ-1前期能夠與前兩者保持一致,后期降低較快。對(duì)型鋼混凝土抗剪承載力的研究表明：型鋼混凝土梁柱節(jié)點(diǎn)的抗剪承載力主要由混凝土提供,混凝土斜壓桿的抗剪承載力約占總承載力的80%以上,型鋼抗剪承載力約占15%,箍筋的抗剪承載力僅占總承載能力的5%；試件SRCJ-2的抗剪承載力較試件SRCJ-3抗剪承載力低約10%,節(jié)點(diǎn)核心區(qū)設(shè)置隔板能夠有效約束混凝土；建議節(jié)點(diǎn)核心區(qū)的抗剪承載力計(jì)算不考慮箍筋部分的作用,把這部分作為抗剪承載力的安全儲(chǔ)備。研究成果對(duì)提出受力合理,便于設(shè)計(jì)和施工的新型的梁柱節(jié)點(diǎn)形式提供了試驗(yàn)數(shù)據(jù)與理論依據(jù),不僅使設(shè)計(jì)和施工工序得到簡(jiǎn)化,還使施工質(zhì)量得到保證。
[Abstract]:The hybrid structure system is widely used in high-rise and super-high-rise structures, but there are still some problems to be solved in practical engineering application. At present, the research on SRC at home and abroad mainly focuses on the seismic behavior of SRC frame joints, the seismic behavior of SRC frame structures and the fire resistance of SRC. There are few researches on simplifying the design of SRC joints and proposing a new form of joint construction to simplify the construction process. The formulas for calculating the shear behavior and shear bearing capacity of SRC Liang Zhu joints in the core area need to be further studied. The existing steel reinforced concrete Liang Zhu joints in our country are still designed by opening holes in the section steel Liang Zhu web to pass through stirrups. This not only makes construction more difficult, but also weakens the web plate of the section steel and has a certain effect on the bearing capacity of the joints. On the basis of referring to the existing structural forms of steel reinforced concrete (SRC) Liang Zhu joints, this paper combines the theory of shear resistance in the core region of SRC joints at home and abroad. A SRC beam column joint (SRCJ-1) with a partition in the core area is designed, and the seismic behavior of SRCJ-1 is studied. At the same time, a kind of component (SRCJ-2 and SRCJ-3) is designed according to the traditional method and the core region is not equipped with stirrups. The low cycle reciprocating loading tests are also carried out for these two kinds of components. The design of the specimens is carried out according to the principle of "strong beam and weak column weak joint". The crack development and distribution law of each member, the load displacement curve at the end of the beam and the main strain of the member are obtained through the test. According to the test results, the failure mechanism of the structure, the skeleton curve of the beam end, the yield load and the ultimate load, the displacement ductility coefficient and the energy dissipation performance are obtained. The strength attenuation curve, stiffness degradation curve and the main strain development law in the core region of the joint. Through the analysis of these contents, we get the following conclusions: the failure form of all the components is the shear baroclinic failure in the core area, which is consistent with the design purpose, the yield load of the specimen SRCJ-2 and SRCJ-3, the yield load of SRCJ-2 and SRCJ-3, The ultimate load and seismic performance are basically consistent, the SRCJ-1 is slightly lower than both, the strength attenuation and stiffness degradation trend of SRCJ-2 and SRCJ-3 are in good agreement, the former SRCJ-1 is consistent with the former, and the latter is decreasing rapidly. The research on the shear bearing capacity of steel reinforced concrete (SRC) shows that the shear bearing capacity of SRC Liang Zhu joints is mainly provided by concrete, and the shear bearing capacity of concrete inclined compression bar accounts for more than 80% of the total bearing capacity. The shear bearing capacity of section steel is about 15 percent, the shear capacity of stirrups is only 5 percent of the total bearing capacity, the shear capacity of the specimen SRCJ-2 is about 10 percent lower than that of the specimen SRCJ-3, and the partition in the core zone of the joint can effectively constrain concrete. It is suggested that the calculation of shear bearing capacity in the core region of joints does not consider the role of stirrups, and this part is considered as the safe reserve of shear bearing capacity. The research results provide experimental data and theoretical basis for proposing a new type of Liang Zhu node with reasonable force and convenient design and construction. It not only simplifies the design and construction process, but also ensures the construction quality.
【學(xué)位授予單位】：沈陽(yáng)建筑大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：TU398.9

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