【作者】 朱民伟；

【导师】 李珠；

【作者基本信息】 太原理工大学 ， 结构工程， 2012， 博士

【摘要】 玻化微珠永久性保温墙模复合剪力墙结构是适应建筑节能的发展要求提出的新型结构自保温体系。该结构采用玻化微珠保温砌块作为永久性墙模,在墙模内部按照剪力墙设计方式配置水平与竖向的双层钢筋网,现场浇筑自密实性混凝土,构成现浇混凝土复合剪力墙。该结构体系具有良好的保温隔热性能,实现结构自保温;从结构性能而言,该结构为带缝剪力墙结构,抗震性能良好,有利于实现抗震结构控制。因此该结构可广泛应用于多层、中高层公共建筑和民用建筑。为深入了解玻化微珠永久性保温墙模复合剪力墙结构的抗震性能,本文在前期研究的基础上,以该结构复合剪力墙为研究对象,进行了低周往复载荷作用下的实验研究、数值模拟以及理论分析,以确定其结构承载力,揭示不同参数对其承载力和抗震性能的影响规律,为结构的内力计算、设计方法及构造措施提供基础研究数据。论文的主要研究工作包括:1.针对不同剪跨比的复合剪力墙与普通剪力墙结构进行了低周往复载荷作用下的实验研究,对比分析了两种结构的破坏形式、承载能力、滞回曲线、抗侧移刚度和延性等性能指标。结果表明,在竖向载荷和低周往复载荷共同作用下,复合剪力墙的水平承载力略低于普通剪力墙结构,但是复合剪力墙的滞回曲线较普通剪力墙饱满,显示复合剪力墙结构具有较好的耗能能力和延性性能。破坏形态方面,复合剪力墙裂缝开展区域分散,破坏程度没有实体墙严重。永久性墙模对剪力墙有一定的套箍作用和复合增强作用,使得墙体发生延时破坏。2.在实验研究的基础上,利用有限元软件ABAQUS对复合剪力墙与普通剪力墙结构进行非线性弹塑性分析,系统研究了轴压比、剪跨比、墙体的厚度、配筋率以及混凝土的强度等级等因素对两种剪力墙结构抗震性能的影响。非线性有限元分析结果与实验曲线吻合良好;由保温墙模预设的竖缝使剪力墙结构获得了较好的耗能性能,但其水平承载力下降。通过合理调整墙模的几何参数,在保持较高的侧移刚度和承载能力的条件下,显著提高墙的耗能能力。3.利用整体剪力墙模型和墙板柱模型,对复合剪力墙结构的水平承载力进行理论研究。基于墙板柱模型,建立了复合剪力墙结构的水平承载力计算公式。根据两种不同的模型,建议了三种不同剪跨比的复合剪力墙结构的水平承载力计算方法。分析结果表明,不同剪跨比复合剪力墙具有不同的破坏形式,进行内力计算分析时,应针对不同剪跨比采用不同的简化计算模型来确定结构的承载能力。4.通过试验研究、理论推导及数值仿真分析,确定了影响复合剪力墙结构的抗震性能的主要因素,包括剪跨比、轴压比、配筋率、墙体的厚度等。在分析各影响因素对结构承载力和抗震性能影响的基础上,论文提出了该结构墙体构件的设计建议,为体系设计提供依据,为有关标准规范的编制和自保温结构体系的推广应用奠定基础。更多还原

【Abstract】 The composite shear wall structure system with permanent thermal-insulation wall form of glazed hollow beads is a new structure system with thermo-insulation function in order to adapt the need of energy-saving building.By using thermal-insulation blocks of glazed hollow beads as permanent wall forms,according to shear wall designing style configure horizontal and vertical double-layer steal mesh inside the wall form,and self-compacted concrete is filled in site along the upper chamber of wall form,all construct a composite shear wall.This structure system has good thermo-insulation function and can attain self-thermo-preservation;as for structure character,this structure is a slitted shear wall,which has the excellent seismic behavior,and can realize the seismic structural control.Therefore,this structure can be applied abroad in multi-story and mid-high-story public buildings and residential buildings.In order to investigate the seismic performance of the composite shear wall structure system with permanent thermal-insulation wall form of glazed hollow beads,based on the previous research,the shear wall with this structure was used as study object;the test and numerical simulation and theory analyses were carried out under low period to-and-fro loads in order to confirm bearing capacity of the structure and discover the effects of different parameters to the bearing capacity and seism-resistant character.This can offer basic data for internal force calculation,designing methods and construct measures.The main contents of the paper are as follows:1.The experiments of composite shear wall and common shear wall with different ratio of shear and span were carried out under low cyclic repeated loading.The failure modes,bearing capacity,hysteretic curve,lateral stiffness and ductility of two kinds of structures were compared and analyzed.The results showed that under the vertical loads and cyclic loading,the lateral bearing capacity of composite shear wall was a little lower than the common shear wall structure,however,the hysteretic curve of the former was better than the latter,presenting the composite shear wall structure has better capacity of energy dissipation and ductility.As for the failure modes,the composite shear wall had separate crack-developing zone,not severe than the common wall.The permanent wall form had certain confining and reinforcing action to the shear wall,which made the wall breakage with prolonged time.2.Based on the experiments,the finite element analysis with software ABAQUS was used to compare the structure of the composite shear wall and the common shear wall by nonlinear elastic-plastic analysis.The effects of axial compression ratio,shear span ratio,wall thickness,reinforcement ratio and concrete strength grade to the two kinds of structures were studied systematically.The finite element analysis result had good match with the experiments.The pre-designed vertical slit made the shear wall structure better energy dissipation capacity,however the horizontal bearing capacity dropped.By adjusting the geometry parameters of wall form,with high side movement rigidity and bearing capacity,the energy dissipation capacity was improved remarkably.3.By using the whole shear wall model and wall board column model,the horizontal bearing capacity of composite shear wall structure was studied in theory.Based on the wall board column model,the horizontal bearing capacity calculation formula of composite shear wall structure was derived.According to two different kinds of models,three horizontal bearing capacity calculation formulas of composite shear wall structure with different shear span ratio were advised.The results showed that different composite shear wall with different shear span ratio had different simplified calculation model to confirm the bearing capacity of the structure.4.By experiments,theory deduction and numerical simulation analysis,the main factors influencing the seismic behavior of the composite shear wall structure were confirmed,including shear span ratio,axial compression ratio,reinforcement ratio and the wall thickness etc.Based on the all kinds of factors on the bearing capacity and seismic character of the structure,the designing advices of the structure wall composition were put forward in the paper,which could offer basis for system design,establishment of relevant standard and criterion,application of the self-thermo-preservation structure system.更多还原