本文選題：鋼管混凝土 + 蜂窩梁�。� 參考：《沈陽建筑大學》2014年碩士論文

【摘要】：鋼管混凝土柱具有承載力高、塑性和韌性好、施工方便等優(yōu)點,在工程中得到了越來越廣泛的應用。蜂窩梁具有節(jié)省鋼材、施工方便等優(yōu)點,在工程和研究中也越來越受到重視。因此,如何將二者連接在一起,以及這種連接節(jié)點的力學性能如何,成為土木工程師十分關注的問題,而有關這方面的研究還十分少見。為此,本文深入研究了外加強環(huán)式圓鋼管混凝土柱-蜂窩梁節(jié)點在低周往復荷載下的力學性能,從而為該種節(jié)點的實際工程應用和相關規(guī)范的制定提供理論依據(jù),主要完成了以下工作�；谟邢拊浖嗀BAQUS,建立了外加強環(huán)式圓鋼管混凝土柱-實腹鋼梁節(jié)點的有限元模型,對其在低周往復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方法模擬圓鋼管混凝土柱-蜂窩梁節(jié)點受力過程的可行性。并在此基礎上,根據(jù)實際工程比例縮放建立了圓鋼管混凝土柱-蜂窩梁和鋼梁兩個模型,通過對比兩者在低周往復荷載作用下的滯回曲線、骨架曲線、延性系數(shù)及耗能能力,得到圓鋼管混凝土柱-蜂窩梁節(jié)點具有良好的延性和耗能能力,更容易實現(xiàn)“強柱弱梁”的屈服機制,說明了外加強環(huán)圓鋼管混凝土柱-蜂窩梁節(jié)點具有良好的工程應用價值。本文根據(jù)各參數(shù)不同設計了24個的外加強環(huán)式圓鋼管混凝土柱-蜂窩梁節(jié)點,并采用上述有限元模擬方法,模擬了其受力過程,結(jié)果表明該種節(jié)點滯回曲線均比較飽滿,沒有明顯的剛度退化,其位移延性系數(shù)在4.32-5.19之間,等效粘滯阻尼系數(shù)在0.31-0.36之間,說明整體構(gòu)件具有良好的塑性能力,表現(xiàn)出該節(jié)點均具有良好的延性和抗震能力。采用以上模擬結(jié)果,分析了影響該種節(jié)點骨架曲線的因素,結(jié)果表明環(huán)板寬度、鋼材強度、含鋼率、梁柱線剛度比、開孔率、孔間距、梁上開孔中心到柱壁距離d是主要影響因素,而軸壓比影響不明顯。根據(jù)各參數(shù)對外加強環(huán)圓鋼管混凝土柱-蜂窩梁節(jié)點骨架曲線得出彎矩-轉(zhuǎn)角的影響規(guī)律,進一步分析了各參數(shù)對此節(jié)點抗彎承載力和初始剛度的影響規(guī)律,在此基礎上回歸得到了該種節(jié)點的抗彎承載力、極限抗彎承載力和初始剛度簡化式,并驗證了簡化計算式的準確性,可供實際工程計算參考。
[Abstract]:Concrete-filled steel tubular columns (CFST) have been widely used in engineering because of their high bearing capacity, good ductility and toughness, easy construction and so on. Honeycomb beam has the advantages of saving steel and convenient construction, and has been paid more and more attention in engineering and research. Therefore, how to connect the two joints and how the mechanical properties of the joints are concerned by civil engineers has become a problem of great concern to civil engineers, but the research on this aspect is still very rare. Therefore, in this paper, the mechanical properties of externally reinforced circular concrete-filled steel tubular column-honeycomb beam joints under low cyclic reciprocating loads are studied in depth, which provides a theoretical basis for the practical engineering application of the joints and the formulation of relevant codes. Mainly completed the following work. Based on the finite element software Abaqus, the finite element model of externally reinforced circular concrete-filled steel tubular column-solid steel beam joints is established, and the finite element simulation analysis is carried out on the joints under low cyclic reciprocating loads. The simulation results are verified by the existing test results, and the results show that the two methods are in good agreement with each other, which proves the feasibility of using this finite element simulation method to simulate the stress process of circular concrete-filled steel tubular column-honeycomb beam joints. On this basis, two models of circular concrete-filled steel tubular column-honeycomb beam and steel beam are established according to the scale scaling of practical engineering. The hysteretic curve, skeleton curve, ductility coefficient and energy dissipation capacity of the two models under low cycle reciprocating load are compared. The results show that the concrete-filled steel tubular column-honeycomb beam joints have good ductility and energy dissipation ability, and it is easier to realize the yield mechanism of "strong column and weak beam", which shows that the externally strengthened circular concrete-filled steel tubular column-honeycomb beam joints have good engineering application value. In this paper, 24 externally reinforced circular concrete-filled steel tubular column-honeycomb beam joints are designed according to different parameters. The results show that the hysteretic curves of the joints are full, and the above finite element simulation method is used to simulate the stress process of the joints. The displacement ductility coefficient is between 4.32-5.19 and the equivalent viscous damping coefficient is between 0.31-0.36, which shows that the integral member has good plasticity and good ductility and seismic resistance. By using the above simulation results, the factors affecting the skeleton curve of the joint are analyzed. The results show that the width of the ring plate, the strength of steel, the steel content, Liang Zhu's linear stiffness ratio, the opening ratio, the spacing between holes, The distance from the center of the upper hole to the column wall d is the main factor, but the axial compression ratio is not obvious. According to the skeleton curve of reinforced circular concrete-filled steel tubular column (CFST) column and honeycomb beam, the effect of moment angle on the bending bearing capacity and initial stiffness of the joint is further analyzed. On this basis, the simplified formulas of flexural bearing capacity, ultimate flexural capacity and initial stiffness of the joint are obtained by regression, and the accuracy of the simplified formula is verified, which can be used as a reference for practical engineering calculation.
【學位授予單位】：沈陽建筑大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TU352.11;TU398.9

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