【摘要】：Z形柱在框架結(jié)構(gòu)住宅體系中已有廣泛的運用,然而目前大多數(shù)研究只針對框架節(jié)點的抗震性能及抗剪性能的研究,對于節(jié)點的抗扭性能研究鮮有涉及。本文對鋼筋混凝土Z形柱中間層框架節(jié)點的抗扭性能進行了研究,首先,通過豎向荷載作用下Z形柱中間層節(jié)點抗扭試驗研究,探究了Z形柱框架中間層節(jié)點核心區(qū)的裂縫發(fā)展過程和破壞特征。其次,通過ABAQUS有限元軟件建立分析模型,并將數(shù)值模擬結(jié)果與試驗結(jié)果進行對比研究,驗證數(shù)值計算結(jié)果與試驗結(jié)果是否相吻合,確保有限元模型的可靠性。在此基礎(chǔ)上,通過改變鋼筋混凝土Z形截面柱框架節(jié)點箍筋間距、軸壓比、混凝土強度、肢高肢厚比及縱筋配筋率等參數(shù),分析鋼筋混凝土Z形柱框架節(jié)點的抗扭性能與各參數(shù)的關(guān)系。得出主要結(jié)論：肢高肢厚比是影響節(jié)點抗扭承載力的重要因素,肢高肢厚比提高,節(jié)點抗扭承載力增強；梁縱筋配筋率對節(jié)點的極限扭矩影響較大。最后,對混凝土損傷塑性模型中各參數(shù)的選取進行了研究,研究指出膨脹角選擇36。,粘滯系數(shù)選取0.001是合適的,從而確保本文研究的可靠性,同時也為后續(xù)研究提供參考。
[Abstract]:Z-shaped column has been widely used in frame structure residential system. However, most of the current studies only focus on the seismic performance and shear performance of the frame joints, and the torsional performance of the joints is seldom involved. The torsional test of Z-shaped column middle-story joints under load is carried out to study the crack development and failure characteristics of Z-shaped column frame middle-story joints. Secondly, the analysis model is established by ABAQUS finite element software, and the numerical simulation results are compared with the experimental results to verify whether the numerical results and the experimental results are in harmony. On this basis, the relationship between torsional behavior and parameters of reinforced concrete Z-shaped column frame joints is analyzed by changing stirrup spacing, axial compression ratio, concrete strength, limb height-limb thickness ratio and longitudinal reinforcement ratio. The ratio is an important factor affecting the torsional bearing capacity of the joints. The ratio of height to thickness of the joints increases and the torsional bearing capacity of the joints strengthens. So as to ensure the reliability of this research, and also provide reference for future research.
【學(xué)位授予單位】：浙江工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TU375
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本文編號：2233753