【作者】 宋美洁；

【导师】 李升才；

【作者基本信息】 华侨大学 ， 结构工程， 2009， 硕士

【摘要】 轻型复合结构属于复合混凝土剪力墙结构,其核心构件复合墙板是由两层钢丝网用斜插钢丝(腹丝)连接成空间骨架,中间夹以聚苯乙烯板,两侧浇筑混凝土后形成,具有轻质节能、保温隔声、绿色环保、造价低廉等优点。本文通过试验研究与理论分析的方法,对复合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.对四组(每组3片)1/2比例不同高度的复合墙板进行了竖向轴心荷载作用下的抗压试验,分析了复合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的协同工作,为复合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.对两组(共六片)1/2比例复合墙板进行不同偏心竖向荷载的抗压试验,分析了复合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;提出了复合墙板的偏心受压承载力计算公式。3.对三组(共九片)1/2比例复合墙板进行不同偏心竖向荷载的抗压试验(试件分有无夹芯,斜筋的间距也不同)。分析复合墙板在偏心荷载作用下的受力性能和破坏过程、破坏形态。研究斜筋和夹芯等因素对墙板承载力变形能力的影响。4.对复合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,破坏荷载,用模拟值与试验值相比较。并模拟分析了影响因素。更多还原

【Abstract】 Composite light-weight frame structure is a kind of composite concrete shear wall structure, and it’s main part is the composite light-weight wall,which characterized by low weight、energy saving、sound insulation、environmental protection and low cost etc. Through test study and theoretical analysis, the load-bearing performance, failure process and failure characteristics, deformation performance, bearing capacity and influencing factors of the composite light-weight wall under axial load and eccentric load are thorough analyzed, which lay foundation to correct design and calculation for the structure. The main research work and test results are described as follows:1)Four groups(three pieces of walls each group)1/2-scaled test pieces with different heights were tested under vertical axial-load; the load-bearing performance, failure process, failure characteristic, deformation performance and bearing capacity of the wall were analyzed; the factor such as slenderness ratio of the wall was discussed; the harmoniously working capability of different part of the wall under compression was analyzed, which provide an important support for establishing the calculation formula of bearing capacity of the wall under the axial force.2) Two groups(6 pieces in total)1/2-scaled test pieces with different heights, reinforcement ratio and with or without interlayer were tested under eccentric load; the load-bearing performance, failure process, failure characteristic, deformation performance and bearing capacity of the wall were analyzed; the effect of eccentricity on bearing-capacity,compress performance and deformation on the composite light-weight wall was discussed, and the calculation formula for bearing capacity of the wall under the axial force was established.3) Three groups of 1/2 scale composit light-walls were tested under different eccentic load,the test species are with or without a layer part while the reinforcing bars ratio is different. The load-bearing performance, failure process, failure characteristic, deformation performance and bearing capacity of the wall were analyzed.The performance of the layer part and the reinforcing bars are discussed.4)The nonlinear finite element analysis on the load-bearing performance of the wall under axial load and eccentric load was carried out. Different calculating models were proposed aiming at different analysis contents. The rationality and precision of models were 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, and 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.更多还原