【作者】 董华；

【导师】 姚谦峰；

【作者基本信息】 西安建筑科技大学 ， 结构工程， 2006， 硕士

【摘要】 密肋壁板结构是一种节能抗震型建筑结构新体系，具有很好的发展前景，在前期的研究工作中取得了许多卓有成效的成果。然而，作为一种新型结构体系还有许多问题需要进行研究与完善。本文以密肋壁板结构的主要受力构件——密肋复合墙体为研究对象，在总结分析已有研究成果的基础上，利用试验研究、理论分析和有限元数值模拟，对多层和小高层密肋复合墙体在竖向荷载作用下的受力性能、轴力分配特点、轴心受压承载能力和稳定性进行了研究。主要研究内容包括：1、对5榀1／2比例单层单跨密肋复合墙体进行了竖向荷载作用下的试验研究，研究了密肋复合墙体在竖向荷载作用下的破坏过程、破坏模式和竖向变形性能；分析了肋梁在轴心受压墙体中的作用；竖向荷载在边框柱、肋柱及砌块之间的分配特点及其各自对墙体抗压的贡献；分析了初始缺陷、加载偏心、高厚比、有无填充砌块和不同加载方式等因素对墙体受压承载力的影响，为建立密肋复合墙体正截面轴心受压承载力计算公式提供了依据。2、建立了密肋复合墙体有限元分析模型，利用试验数据验证了模型的精确度和可行性；对竖向荷载在密肋复合墙体边框柱、肋柱和砌块间的分配情况进行了线弹性分析，得出总层数和所在楼层位置等不同因素对墙体各构件轴力分配系数大小的影响规律；应用曲线拟合方法建立了竖向荷载作用下多层和小高层密肋复合墙体各构件轴力分配系数的实用设计计算公式。3、建立了考虑砌块对墙体轴心受压承载力提高系数和稳定系数的密肋复合墙体正截面轴心受压承载力实用计算公式；应用有限元方法对密肋复合墙体进行了非线性分析，着重分析墙体的稳定性，探讨不同因素对墙体稳定系数的影响，得出考虑砌块的密肋复合墙体稳定系数计算公式；采用有限元模型分析了墙体的平面内极限承载力，给出了砌块对墙体轴心受压承载力提高系数的计算公式。更多还原

【Abstract】 Multi-ribbed slab structure is a new structural system, characterized by energy-saving and good aseismic performance, whose development prospect is very good. Though much fruitful progress has been achieved in previous study, there still remains a lot to be studied and perfected as a new structural system. The thesis is devoted to studying on the multi-ribbed composite wall, which is the main bearing member in multi-ribbed slab structure. On the basis of the previous researches, experiments, theoretical analysis and numerical simulation by finite are employed to study the load-bearing performance, axial force distribution, bearing capacity under axial press and stabilization of the multi-story and moderate high- story multi-ribbed composite wall subjected to the vertical load. The main contents are presented as follows:1、 Five 1/2-scaled model experiments of the multi-ribbed composite walls with one span and one story under vertical load are presented; the failure process, failure mode and vertical deformation performance of the wall under vertical load are studied; the thesis analyses the effect of ribbed beams in the wall under axial force and discuses the distribution characteristic and contribution of the vertical load among frame columns, ribbed-columns and filled blocks; meanwhile the impaction on compression capacity of multi-ribbed composite wall put by some factors such as initial flaw, eccentric loading, ratio of height to sectional thickness, with the filled blocks or not and different loading way is discussed, which provides the base for the built of the normal section bearing capacity formula of multi-ribbed composite wall under vertical load.2、 Finite element analysis model of the multi-ribbed composite walls is established, and the precision and feasibility of models are proved by test data; the linear elastic analysis is used to study the axial force distribution among frame columns, ribbed-columns and filled blocks, which can obtain the influences on axial force distribution coefficient of each components by the number and location of layers and so on; the practical computing formula for distribution coefficient of axial force of each component in the multi-ribbed composite wall under vertical loads is built by the curve fitting.3、 The paper constructs the practical normal section bearing capacity formula of multi-ribbed composite wall under vertical load with considering such two coefficients, which are developed by the blocks, as elevated coefficient of the axial compression capacity and stability coefficient of the multi-ribbed composite wall; By means of Finite Element Method (FEM), the paper performs nonlinear analysis on the multi-ribbed composite wall with focusing on the wall’s stability. The effect of different factors to the wall’s stability coefficient is discussed to get the computing formula for stability coefficient of the multi-ribbed composite wall with considering the blocks. Adopting the finite element model to analyses ultimate load in-plane cable-arch of the wall, and the computing formula for the elevated coefficient of bearing capacity of multi-ribbed composite wall under axial load is derived.更多还原