本文選題：裝配式連梁 + 框架-剪力墻結(jié)構(gòu)�。� 參考：《沈陽建筑大學(xué)》2016年碩士論文

【摘要】：目前,對裝配式混凝土結(jié)構(gòu)的研究,主要還是集中于框架結(jié)構(gòu)和剪力墻結(jié)構(gòu),對框架-剪力墻結(jié)構(gòu)(簡稱框剪結(jié)構(gòu))的研究還較少,對框剪結(jié)構(gòu)中剪力墻連梁的裝配方法研究更少,為此,本文提出了一種新型裝配式混凝土框剪結(jié)構(gòu)剪力墻連梁的拼裝連接結(jié)構(gòu)及拼裝連接方法,針對該種混凝土裝配連梁的力學(xué)性能開展了研究。基于有限元軟件WCOMD,建立了普通配筋剪力墻連梁有限元模型,對其在低周往復(fù)荷載作用下的受力過程進行了有限元模擬分析,并利用已有的試驗結(jié)果對模擬結(jié)果進行了檢驗,結(jié)果表明二者吻合較好,從而旁證了采用該種有限元模擬裝配式連梁受力過程的可行性。根據(jù)實際工程尺寸設(shè)計了一組單連梁和一組雙連梁模型,采用上述有限元模擬方法,模擬了其在低周往復(fù)荷載作用下的受力過程,提取了每個試件屈服荷載、峰值荷載及破壞荷載對應(yīng)的應(yīng)力分布圖。詳細對比分析了現(xiàn)澆、裝配及考慮連梁端部破壞向墻內(nèi)擴展的單連梁及雙連梁的受力破壞過程。結(jié)果表明：單連梁和雙連梁在達到屈服荷載時,現(xiàn)澆試件較裝配試件梁端應(yīng)力集中現(xiàn)象更明顯,不考慮較考慮連梁端部破壞向墻內(nèi)擴展時鋼筋與混凝土的最大應(yīng)力大；達到峰值荷載和破壞荷載時,裝配與現(xiàn)澆單連梁的應(yīng)力分布相似。同時,也對比了各組連梁的荷載-位移骨架曲線,延性系數(shù)和能量耗散系數(shù),結(jié)果表明：裝配連梁較現(xiàn)澆連梁的承載力略高,耗能能力、延性好,不考慮擴展區(qū)域的裝配連梁較考慮擴展區(qū)域的裝配連梁承載力高,耗能性能好。為分析不同參數(shù)對裝配連梁荷載位移-骨架曲線的影響,設(shè)計了各參數(shù)不同的11個單連梁以及12個雙連梁,并采用上述有限元模擬方法模擬了其受力過程。通過對比分析不同因素對裝配式單連梁以及雙連梁荷載-位移骨架曲線的影響,可以看出：在單連梁中,試件的荷載、初始剛度隨等效鋼筋面積比的增加而增加,隨灌漿區(qū)長度的增加而減小,與灌漿料強度關(guān)系不大,裝配位置的變化對裝配單連梁的承載力影響比較大,不考慮較考慮連梁端部破壞向墻內(nèi)擴展的試件剛度退化緩慢：在雙連梁中,雙連梁的荷載、初始剛度隨等效鋼筋面積比增加而增加,隨灌漿區(qū)長度、連梁跨高比增加而減小,與灌漿料強度關(guān)系不大,不考慮較考慮連梁端部破壞向墻內(nèi)擴展的試件剛度退化緩慢。
[Abstract]:At present, the research of assembled concrete structure is mainly focused on frame structure and shear wall structure, but the research on frame-shear wall structure (framing shear wall structure for short) is still less. There is less research on the assembly method of shear wall connecting beam in frame-shear structure. Therefore, a new type of assembly concrete frame-shear structure shear wall connecting beam is proposed in this paper. The mechanical properties of this kind of concrete assembled connecting beam are studied. Based on the finite element software WCOMD, the finite element model of common reinforced shear wall connecting beam is established, and the finite element simulation analysis of the finite element analysis is carried out under low cycle reciprocating load, and the simulation results are tested by using the existing test results. The results show that the two methods are in good agreement with each other, which proves the feasibility of using the finite element method to simulate the mechanical process of assembled connecting beams. According to the actual engineering dimensions, a group of single beam and a group of double continuous beam models are designed. The stress process under low cycle reciprocating load is simulated by using the above finite element simulation method, and the yield load of each specimen is extracted. The stress distribution diagram corresponding to peak load and failure load. The mechanical failure process of single and double beams with cast-in-place, assembling and considering the end failure of connecting beam extending into the wall is analyzed in detail. The results show that the stress concentration of cast-in-place specimens is more obvious than that of assembled specimens when the yield load is reached, and the maximum stress of steel bar and concrete is greater when the failure of the end part of the beam is not considered and extends to the wall. When the peak load and failure load are reached, the stress distribution of the assembly is similar to that of the cast-in-place single beam. At the same time, the load-displacement skeleton curve, ductility coefficient and energy dissipation coefficient of each group of connected beams are compared. The results show that the load carrying capacity, energy dissipation capacity and ductility of assembled connecting beams are slightly higher than that of cast-in-situ beams. The load capacity and energy dissipation performance of the assembled connecting beams without considering the expansion area are higher than those with the expansion zone. In order to analyze the influence of different parameters on the load-displacement-skeleton curve of the assembled connecting beam, 11 single and 12 double-connected beams with different parameters were designed, and the stress process was simulated by using the above finite element simulation method. By comparing and analyzing the influence of different factors on the load-displacement skeleton curve of fabricated single beam and double continuous beam, it can be seen that the load and initial stiffness of the specimen increase with the increase of the area ratio of the equivalent steel bar in the single beam. With the increase of grouting area length, it is not related to the strength of grouting material, and the change of assembly position has a great influence on the bearing capacity of single beam assembly. Without considering the stiffness of the specimen extending into the wall, the initial stiffness of the double beam increases with the increase of the area ratio of the equivalent reinforcement, and decreases with the increase of the ratio of span to height of the grouting area, while the stiffness of the specimen extending to the wall is slower than that of the specimen with the consideration of the end damage of the connecting beam. It has little relation to the strength of the grouting material, and the stiffness of the specimen which extends to the wall without considering the damage at the end of the connecting beam is slow to degrade.
【學(xué)位授予單位】：沈陽建筑大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：TU37

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