方钢管混凝土框架—薄钢板剪力墙的受力性能研究

发布时间：2018-06-25 04:41

本文选题：方钢管混凝土框架 + 薄钢板剪力墙　；参考：《西安建筑科技大学》2013年硕士论文

【摘要】：在梁柱刚接的框架-薄钢板剪力墙结构中，受压边柱是其关键的受力构件之一，决定着框架-薄钢板剪力墙的受力性能和破坏形态。本文基于框架-薄钢板剪力墙的理想破坏机制，根据梁、柱塑性铰位置，推导了薄钢板剪力墙边缘构件的计算公式，给出了薄钢板剪力墙、梁和柱之间的强度关系式。基于上述公式设计了3榀单跨两层方钢管混凝土框架-薄钢板剪力墙足尺模型。采用大型通用非线性有限元软件ABAQUS6.10对分析模型进行了非线性数值分析。结果表明，顶梁能为单侧拉力场提供足够的抗弯承载力，防止顶梁跨中形成塑性铰；各层薄钢板剪力墙承担的侧向荷载基本相同，表明上述计算公式确定的边缘构件能够为薄钢板剪力墙提供足够的锚固强度，有效控制受压柱的塑性铰位置，防止柱中部形成塑性铰，使框架-薄钢板剪力墙实现理想的破坏机制，即薄钢板剪力墙全部屈服，梁端和柱底形成塑性铰。为了研究方钢管混凝土框架-薄钢板剪力墙的受力性能，采用非线性有限元软件ABAQUS6.10对其受力机理、破坏机制、极限承载力、刚度、剪力分配和柱子的受力特征进行了研究。结果表明：分析模型实现了理想的破坏机制，即“弱板强框架，强柱弱梁”，达到双重抗震设防的目的；虽然梁端和柱底形成了塑性铰，但框架-薄钢板墙仍然能够继续承担侧向荷载，极限承载力下降缓慢。当肋板刚度比为32时，十字加劲肋能够提高薄钢板剪力墙的弹性屈曲荷载、极限承载力和初始刚度；在初始剪力分配中，薄钢板墙承担的剪力约占78%，，在极限荷载剪力分配中，薄钢板墙承担的剪力约占60%；由于薄钢板墙拉力场的作用，方钢管柱壁与混凝土产生了分离。
[Abstract]:In the frame-thin steel plate shear wall structure with Liang Zhu rigid connection, the beam-pressed column is one of the key members, which determines the mechanical behavior and failure pattern of the frame-thin steel plate shear wall. Based on the ideal failure mechanism of frame-thin steel plate shear wall and according to the plastic hinge position of beam and column, this paper deduces the calculation formula of the edge member of thin steel plate shear wall, and gives the strength relation between thin steel plate shear wall, beam and column. Based on the above formula, three full-scale models of single-span and two-story concrete filled steel tube frame-thin steel plate shear wall are designed. The nonlinear numerical analysis of the model is carried out with Abaqus 6.10, a general nonlinear finite element software. The results show that the top beam can provide enough flexural bearing capacity for the unilateral tensile force field to prevent plastic hinge from forming in the span of the top beam, and the lateral load of the thin steel plate shear wall is basically the same. It is shown that the edge member determined by the above calculation formula can provide enough anchoring strength for the thin steel plate shear wall, effectively control the plastic hinge position of the compressed column, and prevent the plastic hinge from forming in the middle of the column. The ideal failure mechanism of the frame-thin steel plate shear wall is realized, that is, the thin steel plate shear wall yielding completely and the beam end and column bottom forming plastic hinge. In order to study the mechanical behavior of concrete-filled square steel tube frame-thin steel plate shear wall, a nonlinear finite element software Abaqus 6.10 was used to study the mechanical mechanism, failure mechanism, ultimate bearing capacity, stiffness, shear force distribution and stress characteristics of columns. The results show that the analytical model realizes the ideal failure mechanism, that is, "weak plate strong frame, strong column and weak beam", which achieves the purpose of double seismic fortification, although plastic hinge is formed at the end of beam and column bottom. However, the frame-thin steel plate wall can continue to bear lateral load, and the ultimate bearing capacity decreases slowly. When the stiffness ratio of ribbed plate is 32, cross stiffener can improve the elastic buckling load, ultimate bearing capacity and initial stiffness of thin steel plate shear wall. The shear force of thin steel plate wall is about 60, and the square steel pipe column wall is separated from concrete because of the force field of thin steel plate wall.
【学位授予单位】：西安建筑科技大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU398

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