预制装配蜂窝型钢混凝土梁抗剪性能及设计方法试验研究

发布时间：2018-01-16 07:24

本文关键词：预制装配蜂窝型钢混凝土梁抗剪性能及设计方法试验研究　出处：《西安建筑科技大学》2015年硕士论文　论文类型：学位论文

【摘要】：预制装配蜂窝型钢混凝土梁是一种新型组合结构形式,它兼具型钢混凝土结构、预制装配结构以及蜂窝型钢梁的优点,具有非常广泛应用前景。本文结合7个T型梁试件,对预制装配蜂窝型钢混凝土梁斜截面破坏形态、延性、抗剪承载力及刚度等性能展开了研究,并结合理论方法,推导和建立了抗剪承载力和挠度的计算理论和计算方法。共设计和制作7个预制装配蜂窝型钢混凝土T形梁试件,结合单调集中荷载静力试验研究,着重研究名义加载剪跨比、现场后浇混凝土强度及蜂窝型钢孔洞位置等参数对预制装配蜂窝型钢混凝土梁的裂缝发展、破坏形态、变形能力及抗剪承载力的影响。试验研究结果表明:(1)预制装配蜂窝型钢混凝土梁中预制、后浇混凝土及蜂窝型钢变形协调,未发生明显纵向滑移;(2)预制装配蜂窝型钢混凝土梁变形能力较好,斜截面剪切破坏时具有良好塑性;(3)预制装配蜂窝型钢混凝土梁抗剪承载力与剪跨比、现浇混凝土强度以及蜂窝孔洞位置密切相关。进一步结合试验研究结果,对预制装配蜂窝型钢混凝土梁斜截面抗剪机理进行分析,并在相关理论研究结果的基础上,进一步分析了考虑蜂窝型钢孔洞位置、孔洞形状对抗剪承载力的影响,提出了预制装配蜂窝型钢混凝土梁的抗剪承载力计算公式以及挠度计算方法,其计算值与试验值吻合较好。预制装配组合结构是钢—混凝土组合结构的重要发展方向,预制装配蜂窝型钢混凝土梁具有良好性能优势和广泛应用前景,但相关研究开展较少,本文研究成果可为建立预制装配蜂窝型钢混凝土梁的设计和施工方法提供依据。
[Abstract]:Prefabricated honeycomb steel reinforced concrete beam is a new type of composite structure, which has the advantages of steel reinforced concrete structure, prefabricated assembly structure and honeycomb steel beam. In this paper, the failure mode, ductility, shear capacity and stiffness of prefabricated honeycomb steel reinforced concrete beams are studied. Combined with the theoretical method, the calculation theory and calculation method of shear capacity and deflection are derived and established. Seven prefabricated honeycomb steel reinforced concrete T-shaped beam specimens are designed and manufactured. Combined with the static test of monotone concentrated load, the crack development of prefabricated beehive reinforced concrete beams with the parameters of nominal loading shear span ratio, post-pouring concrete strength and hole position of honeycomb steel is studied. The experimental results show that: 1) prefabricated beehive reinforced concrete beams are prefabricated, and post-cast concrete and honeycomb steel deformation are coordinated. No obvious longitudinal slip occurred; (2) prefabricated beehive reinforced concrete beams have good deformation capacity and good plasticity during shear failure of oblique sections; 3) the shear bearing capacity of prefabricated beehive reinforced concrete beams is closely related to the shear span ratio, the strength of cast-in-place concrete and the location of honeycomb holes. The shear resistance mechanism of prefabricated honeycomb steel reinforced concrete beams is analyzed, and the hole position of honeycomb steel is further analyzed on the basis of relevant theoretical research results. The influence of the hole shape on the shear bearing capacity is studied. The formula of shear bearing capacity and the calculation method of deflection of prefabricated beehive reinforced concrete beams are proposed. The prefabricated composite structure is an important development direction of steel-concrete composite structure. Prefabricated assembly honeycomb steel reinforced concrete beam has good performance advantages and wide application prospects. However, there are few related studies. The research results in this paper can provide the basis for the design and construction of prefabricated assembly steel reinforced concrete beams.
【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】：2015
【分类号】：TU398.9

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