本文選題：裝配式混凝土框架 + 錨固與搭接��； 參考：《東南大學(xué)》2017年博士論文

【摘要】：在我國(guó)建筑業(yè)轉(zhuǎn)型升級(jí)的新形勢(shì)下,裝配式混凝土結(jié)構(gòu)較為契合我國(guó)建筑產(chǎn)業(yè)現(xiàn)代化的內(nèi)涵,成為了我國(guó)新型建筑工業(yè)化發(fā)展的重要方向和突破點(diǎn),也是行業(yè)關(guān)注與研究的熱點(diǎn)。在各類裝配式混凝土結(jié)構(gòu)體系中,遵循"等同現(xiàn)澆"理念的裝配式混凝土結(jié)構(gòu)以其相對(duì)容易的可實(shí)現(xiàn)性得到了最廣泛的應(yīng)用。然而,目前付諸應(yīng)用的裝配式混凝土框架結(jié)構(gòu)體系普遍存在著精度加工要求高、適用性不足、施工建造不便等問(wèn)題,這大大抵消了裝配式混凝土框架結(jié)構(gòu)的應(yīng)用優(yōu)勢(shì)。因此,在工業(yè)化建筑結(jié)構(gòu)建造向高效施工方向發(fā)展的趨勢(shì)下,裝配式混凝土框架結(jié)構(gòu)急需進(jìn)一步改進(jìn)。為進(jìn)一步提高裝配式混凝土框架結(jié)構(gòu)建造效率,降低生產(chǎn)成本,實(shí)現(xiàn)裝配式混凝土框架結(jié)構(gòu)高效施工,本文對(duì)采用"大直徑、少根數(shù)"思路的新型錨固與附加鋼筋搭接混合連接進(jìn)行了抗震性能研究,同時(shí)提出了"高強(qiáng)度、小直徑"的新型部分高強(qiáng)筋預(yù)制裝配式框架梁柱連接并開(kāi)展了抗震性能研究。論文的主要工作及成果如下:(1)基于裝配式混凝土框架梁柱連接的內(nèi)力傳遞方式,提出了新的預(yù)制梁柱連接分類方法,分別為直接傳力連接、間接傳力連接和混合傳力連接三類,并對(duì)既有的各種預(yù)制梁柱連接進(jìn)行了歸類和梳理。(2)開(kāi)展了兩類梁端底筋錨入式預(yù)制梁柱連接低周反復(fù)試驗(yàn)研究,試件包括一個(gè)現(xiàn)澆對(duì)比試件,兩個(gè)新型錨固與附加鋼筋搭接混合連接試件和兩個(gè)新型部分高強(qiáng)筋預(yù)制裝配式框架梁柱連接試件。系統(tǒng)分析試驗(yàn)結(jié)果,包括破壞形態(tài)、滯回曲線、骨架曲線、強(qiáng)度、變形能力、剛度退化、耗能能力等;結(jié)果表明,兩類梁端底筋錨入式預(yù)制梁柱連接試件均表現(xiàn)出不弱于現(xiàn)澆試件的抗震性能。(3)采用有限元分析軟件ABAQUS建立了有限元模型,并將分析結(jié)果與試驗(yàn)結(jié)果對(duì)比,來(lái)驗(yàn)證有限元模型對(duì)試驗(yàn)結(jié)果的再現(xiàn)性�；谟邢拊Ｐ�,通過(guò)參數(shù)變化分析,進(jìn)一步分析不同參數(shù)對(duì)梁端底筋錨入式預(yù)制梁柱連接抗震性能的影響。(4)針對(duì)梁端底筋錨入式預(yù)制梁柱連接低周反復(fù)試驗(yàn)結(jié)果,系統(tǒng)分析和研究了試件的塑性鉸。考慮低周反復(fù)荷載作用的特點(diǎn),提出了考慮拉壓反復(fù)作用的混凝土損傷塑性鉸長(zhǎng)度取值辦法,得出了各試件塑性鉸試驗(yàn)長(zhǎng)度;提出了本文修正的塑性鉸長(zhǎng)度計(jì)算模型,適用于預(yù)制混凝土構(gòu)件,填補(bǔ)了目前對(duì)預(yù)制構(gòu)件塑性鉸長(zhǎng)度研究的空白。(5)基于理論分析和試驗(yàn)結(jié)果擬合,建立梁端底筋錨入式預(yù)制梁柱連接試件的靜力計(jì)算模型和恢復(fù)力模型。通過(guò)與試驗(yàn)曲線的對(duì)比,建立的計(jì)算模型結(jié)果可較好地反映梁端底筋錨入式預(yù)制梁柱連接的受力特點(diǎn)和滯回特性。通過(guò)上述試驗(yàn)研究與理論分析工作,對(duì)梁端底筋錨入式預(yù)制梁柱連接的抗震性能有了較為深入的了解,形成了一定的基礎(chǔ)試驗(yàn)數(shù)據(jù)和初步的理論模型,為該類裝配式混凝土框架結(jié)構(gòu)進(jìn)一步研究和應(yīng)用奠定了基礎(chǔ)。
[Abstract]:Under the new situation of China's construction industry transformation and upgrading, the prefabricated concrete structure accords with the connotation of the modernization of China's construction industry, and has become an important direction and breakthrough point for the development of new construction industrialization in China. Also is the industry concern and the research hot spot. In all kinds of prefabricated concrete structures, the prefabricated concrete structures, which follow the concept of "equal cast-in-place", have been widely used for their relatively easy realizability. However, there are many problems such as high precision requirement, insufficient applicability and inconvenient construction, which greatly offset the advantages of prefabricated concrete frame structure. Therefore, under the trend of the construction of industrial building structure to the direction of efficient construction, the prefabricated concrete frame structure is in urgent need of further improvement. In order to further improve the construction efficiency of prefabricated concrete frame structure, reduce the production cost and realize the efficient construction of prefabricated concrete frame structure, this paper adopts "large diameter", The aseismic performance of a new type of Anchorage and additional steel lapped joint is studied, and a new type of "high strength, small diameter" prefabricated frame Liang Zhu connection with "high strength and small diameter" is put forward, and the seismic performance is also studied. The main work and results of this paper are as follows: (1) based on the internal force transfer method of Liang Zhu connection of prefabricated concrete frame, a new classification method of prefabricated Liang Zhu connection is proposed, which includes direct force transfer connection, indirect force transfer connection and hybrid force transfer connection. At the same time, the existing prefabricated Liang Zhu connections are classified and combed. (2) the low cycle repeated tests of two kinds of beams with bottom reinforcement anchor type prefabricated Liang Zhu connections are carried out. The specimens include a cast-in-place contrast specimen. Two new types of anchoring and additional reinforcing bar lapped joint specimens and two new type of prefabricated Liang Zhu connection specimens with partial high strength tendons are introduced in this paper. The experimental results, including failure form, hysteretic curve, skeleton curve, strength, deformation ability, stiffness degradation, energy dissipation capacity, etc. The aseismic behavior of the two kinds of prefabricated Liang Zhu connections with bottom reinforcement anchor is not weaker than that of cast-in-place specimens. The finite element model is established by using the finite element analysis software ABAQUS, and the results are compared with the test results. To verify the reproducibility of the finite element model to the test results. Based on the finite element model, the influence of different parameters on the seismic behavior of Liang Zhu connections with anchor at the end of beam end is further analyzed by means of parameter change analysis. (4) aiming at the low cycle repeated test results of prefabricated Liang Zhu connections with bottom tendons at the end of beams, The plastic hinge of the specimen is analyzed and studied systematically. Considering the characteristics of low cycle cyclic loading, a method of determining the length of damaged plastic hinge of concrete considering the repeated action of tension and compression is put forward, and the test length of plastic hinge of each specimen is obtained, and the modified model for calculating the length of plastic hinge in this paper is put forward. Based on the theoretical analysis and experimental results fitting, the static calculation model and the restoring force model of the precast Liang Zhu connection specimens with beam bottom reinforcement anchor are established, which are suitable for precast concrete members and fill the blank in the study of the plastic hinge length of the prefabricated members. By comparing with the test curve, the calculated results can well reflect the mechanical characteristics and hysteretic characteristics of the prefabricated Liang Zhu connections with bottom reinforcement at the end of the beam. Based on the above experimental research and theoretical analysis, the seismic performance of pre-fabricated Liang Zhu connections with bottom reinforcement at the end of the beam is deeply understood, and a certain basic test data and a preliminary theoretical model are formed. It lays a foundation for further research and application of this kind of prefabricated concrete frame structure.
【學(xué)位授予單位】：東南大學(xué)
【學(xué)位級(jí)別】：博士
【學(xué)位授予年份】：2017
【分類號(hào)】：TU352.11;TU375.4

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本文編號(hào)：1910885