【作者】 罗烨钶；

【导师】 李升才；

【作者基本信息】 华侨大学 ， 结构工程， 2008， 硕士

【摘要】 节能砌块隐形密框结构是根据混凝土小型空心砌块结构及配筋砌体结构,针对于应用广泛的多层及中高层住宅建筑研制开发的具有轻质节能、保温隔声、绿色环保、造价低廉等优点的新型结构体系。本文通过试验研究与理论分析的方法,对节能砌块隐形密框结构墙板在竖向轴心荷载及偏心荷载作用下的受力性能、破坏过程、破坏形态、变形性能、承载能力和影响因素进行了较为系统和深入的研究,为墙板和结构进行正确的设计计算奠定了基础。关于本文的研究工作及主要成果有:1.对三组(每组2片)1/2比例不同高度的节能砌块隐形密框结构墙板进行了竖向轴心荷载作用下的抗压试验,分析了节能砌块隐形密框结构墙板在轴心荷载作用下的受力性能、破坏过程、破坏形态、变形性能、承载能力等;研究不同高厚比对墙板轴心受压承载力、受压性能等的影响;分析墙板各个组成部分各自在受压过程中的作用以及它们相互间的影响,荷载在隐形柱及砌块间的分配特点,为节能砌块隐形密框结构墙板在轴心荷载作用下承载力计算公式的建立奠定了基础。2.对四组(每组1片)1/2比例相同尺寸和相同配筋的节能砌块隐形密框结构墙板进行了偏心荷载作用下的抗压试验,分析了节能砌块隐形密框结构墙板在偏心荷载作用下的受力性能、破坏过程、破坏形态、变形性能、承载能力等;研究不同偏心距对墙板承载力、受压性能和变形的影响;提出了节能砌块隐形密框结构墙板的偏心受压承载力计算公式。3.对节能砌块隐形密框结构墙板在轴心荷载及偏心荷载作用下的受力性能进行了有限元数值分析。根据不同的分析内容提出了相应的有限元计算模型,并利用试验数据对计算模型进行了验证;在对墙板的轴心受压有限元非线性分析中,重点分析墙板的受压性能、稳定性及影响因素,提出稳定系数计算公式,从而得到墙板的轴心受压承载力计算公式;在对墙板偏心受压有限元非线性分析中,扩大分析参数,了解墙板偏心距的变化对承载力的影响程度并验证了墙板的偏心受压承载力计算公式。4.对节能砌块隐形密框结构墙板的正截面受压设计方法进行了探讨,提出了相应的设计公式及概念设计方法。更多还原

【Abstract】 Energy-saving block & invisible multi-ribbed frame structure is a new structural system, characterized by low weight、energy saving、sound insulation、environmental protection、low cost. It developed on the basis of small-size concrete hollow block structure and reinforced masonry structure, which be using for multi-storey and high-rise residential building. Through experiments and theoretical analysis, the load-bearing performance, failure process and failure characteristic, deformation performance, bearing capacity and influencing factors of the energy-saving block & invisible multi-ribbed frame structure wall under axial load and eccentric load are father analyzed, which laid foundation to correct design and calculation for the structure. The paper main research work and results are described as follows:Three groups(two walls in one group)1/2-scaled model experiments of the energy-saving block & invisible multi-ribbed frame structure walls with different heights under vertical axial-load are presented; the load-bearing performance, failure process, failure characteristic, deformation performance and bearing capacity of the wall are analyzed; the factor such as ratio of height to sectional thickness of the wall are discussed; the effect and correlation of different part of the wall under compression, the axial force distribution among multi-ribbed frame columns and blocks are analyzed, which provide an important support for establishing the calculation formula of axial force bearing capacity of the wall.Four groups (one wall in one group)1/2-scaled model experiments of the energy-saving block & invisible multi-ribbed frame structure walls with same size and reinforcement under vertical eccentric-load are presented; the load-bearing performance, failure process, failure characteristic, deformation performance and bearing capacity of the wall are analyzed; the influence of eccentricity on the wall’s bearing capacity、load-bearing performance and deformation performance are discussed; and the calculation formula of eccentric force bearing capacity of the wall is proposed.The nonlinear finite element analysis is used to study the load-bearing performance of the wall under axial load and eccentric load. Aimed at different analysis contents, different calculating models are proposed, and the rationality and precision of models are proved by test data. Meanwhile nonlinear finite element analysis is employed to analyze the stabilization of the wall under vertical axial-load, a calculation formula of stabilization coefficient is proposed, then the axial capacity calculation formula of the wall is proposed. By adding parameters, nonlinear finite element analysis is employed to analyze the bearing capacity of the wall under vertical eccentric-load, and the precision of the calculation formula of eccentric force bearing capacity of the wall is proved.The Normal section design methods of the wall under vertical load are discussed, which include calculation formula and concept design method.更多还原