【摘要】：隨著社會經(jīng)濟的發(fā)展，，超長混凝土結(jié)構(gòu)在我國的應(yīng)用越來越多，而由于建筑功能上的需要，要求結(jié)構(gòu)中少設(shè)甚至不設(shè)變形縫。但是，超長混凝土結(jié)構(gòu)一般不能采取一次澆筑成型，而是分段澆筑，后澆帶法在此時就得到了很好的應(yīng)用和發(fā)展。當(dāng)前，后澆帶法的工程實踐經(jīng)驗要遠遠領(lǐng)先于理論的研究，設(shè)計人員大都在設(shè)計時參考已有工程實踐經(jīng)驗，甚至完全參照已有工程做法，未經(jīng)過仔細分析研究，結(jié)構(gòu)在使用中不但達不到控制裂縫的目的，反造成裂縫的大量出現(xiàn)，為建筑的后期使用帶來諸多問題。 本文在總結(jié)前人大量研究成果的基礎(chǔ)上，對研究較少的設(shè)置后澆帶的框架結(jié)構(gòu)抗震性能進行試驗研究。主要工作有以下幾個方面： 首先介紹后澆帶在超長混凝土結(jié)構(gòu)中的作用原理，并對超長混凝土結(jié)構(gòu)后澆帶在國內(nèi)外的研究現(xiàn)狀進行系統(tǒng)總結(jié)和分析。 借鑒前人研究成果，從橫穿后澆帶的鋼筋、后澆帶設(shè)置形式、后澆帶的處理方式和建筑結(jié)構(gòu)形式四個方面，詳細總結(jié)和分析了影響后澆帶在超長混凝土結(jié)構(gòu)中發(fā)揮有效作用的因素，為全面理解和應(yīng)用后澆帶提供理論基礎(chǔ)。 通過對5榀設(shè)置后澆帶框架和整澆框架的擬靜力試驗，研究了后澆帶處縱筋貫通、頂部縱筋搭接和梁腹增設(shè)縱向附加鋼筋對框架抗震性能的影響，對框架的破壞形態(tài)、滯回曲線、骨架曲線、變形能力、剛度退化、耗能能力、變形恢復(fù)能力等進行了對比分析。試驗結(jié)果表明，后澆帶新舊混凝土接縫面較易形成貫通裂縫，通過增加梁腹縱向附加鋼筋可有效地避免裂縫貫通整個截面；后澆帶處增加縱向附加鋼筋對框架抗震性能影響最為顯著，對框架耗能能力、變形能力起到積極作用，但加速了框架的剛度退化以及增加了框架的殘余變形；后澆帶處鋼筋搭接對框架耗能能力稍有提高，加速了框架剛度退化以及增加了框架殘余變形，但對框架的其它抗震性能影響不明顯；后澆帶處鋼筋貫通對框架的剛度退化和殘余變形有一定的不利影響，對框架延性有一定的提高作用，但對框架耗能能力影響甚微。
[Abstract]:With the development of social economy, the application of super-long concrete structure in our country is more and more. However, due to the need of building function, there are few or no deformation joints in the structure. However, the super-long concrete structure can not be cast once, but by sections, and the post-pouring belt method has been well applied and developed at this time. At present, the engineering practical experience of the post-pouring belt method is far ahead of the theoretical research. The designers mostly refer to the existing engineering practical experience in the design, even refer to the existing engineering practice completely, without careful analysis and research. The structure not only can not achieve the purpose of controlling the crack, but also causes a large number of cracks, which brings many problems for the later use of the building. In this paper, on the basis of summarizing a large number of previous research results, the seismic behavior of frame structures with few post-cast-in-place belts is studied experimentally. The main work is as follows: firstly, the working principle of the post-pouring belt in the super-long concrete structure is introduced, and the research status of the post-pouring belt of the super-long concrete structure at home and abroad is summarized and analyzed systematically. Referring to the previous research results, this paper discusses four aspects: the steel bar that passes through the post-pouring belt, the setting form of the post-pouring belt, the treatment mode of the post-cast-in-place belt and the form of the building structure. This paper summarizes and analyzes in detail the factors that affect the effective role of the post-pouring belt in the super-long concrete structure, which provides a theoretical basis for the comprehensive understanding and application of the post-cast-in-place belt. Based on the quasi-static tests of five post-cast-in-place frames and whole-cast frames, the effects of longitudinal reinforcement at the post-cast-in-place, the overlap of the top longitudinal reinforcement and the addition of longitudinal additional reinforcement on the seismic behavior of the frame and the failure pattern of the frame are studied. The hysteretic curve, skeleton curve, deformation capacity, stiffness degradation, energy dissipation capacity, deformation recovery ability and so on are compared and analyzed. The experimental results show that the new and old concrete joints of the post-cast-in-place belt are easy to form through cracks, and the cracks can be effectively avoided through the whole section by adding longitudinal reinforcement to the ventral of the beam. The addition of longitudinal reinforcement at the post-cast-in-place has the most significant effect on the seismic behavior of the frame, and plays a positive role in the energy dissipation and deformation capacity of the frame, but it accelerates the stiffness degradation of the frame and increases the residual deformation of the frame. The lapping of steel bars at the post-cast-in-place has slightly improved the energy dissipation capacity of the frame, accelerated the degradation of the frame stiffness and increased the residual deformation of the frame, but has little effect on the other seismic behavior of the frame. The reinforcement penetration at the post-cast-in-place has a certain adverse effect on the stiffness degradation and residual deformation of the frame, and has a certain effect on the ductility of the frame, but has little effect on the energy dissipation capacity of the frame.
【學(xué)位授予單位】：重慶大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2013
【分類號】：TU755

【引證文獻】

相關(guān)期刊論文 前3條

1 劉文奇;;針對混凝土后澆帶應(yīng)用分析及優(yōu)化探究[J];門窗;2015年04期

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相關(guān)碩士學(xué)位論文 前5條

1 申燕;基于跳倉法的超長混凝土結(jié)構(gòu)施工質(zhì)量控制研究[D];蘇州科技大學(xué);2017年

2 夏玲;大體積混凝土施工的裂縫控制研究[D];湖北工業(yè)大學(xué);2017年

3 婁虹玉;某博覽中心框架結(jié)構(gòu)超長設(shè)計研究[D];貴州大學(xué);2016年

4 賴航;超長超大面積混凝土底板裂縫控制研究與應(yīng)用[D];重慶大學(xué);2015年

5 趙云波;無縫連續(xù)澆筑大體積混凝土溫度控制及應(yīng)變分析[D];西安建筑科技大學(xué);2015年

本文編號：2471109