再生混凝土墙板-轻钢住宅薄柔框架受力性能与设计方法研究

Technical Specification for Light-Steel Structure of Residential Building（JGJ209-2010） allows the using of members composed of non-compact sections which are prone to local buckling to obtain a good economy. If the resource conservational recycled aggregate concrete wall panels can be introduced, and then their roles can be considered in seismic analysis of the light-steel frame structures composed of non-compact sections, the industrialization of light-steel structure of residential building will be promoted to a further step.. With the method of combining experimental research, numerical simulation and theoretical analysis, the mechanical behaviour of the recycled aggregate concrete wall panels- light steel residential building frame structures composed of non-compact sections is researched systematically, the mechanism of wall panels work together with steel frame is clear, and nonlinear analysis methods of steel frames composed of non-compact sections considering the effects of light wall panels.With this method, the connection details of wall panels with steel frameworks and there theoretical and numerical models can be made clearly, and the stability load-carrying capacity, stiffness and energy dissipation capacity of frames considering the effects of wall panels and the node failure characteristics can also be determined.As result, recommended values of story drift and the simplified formula of the lateral stiffness of thin flexible steel frame structures affected by embedded and plug-in recycled aggregate concrete wall panels,and the simplified methods considering the influence of local buckling and light wall stiffness in the overall structure are proposed.With the double-layer single span full scale plane frame model embedded and plug-in wall panels, static, low cyclic loading tests will be done to validate the accuracy and reliability of the proposed theoretical models and numerical methods, and the test results are also used to revise and impose them. Thus, the basis for the structural analysis and design of light-steel structure of residential building composed of non-compact section members can be provided.

《轻型钢结构住宅技术规程》JGJ209-2010允许采用易发生局部失稳的较大宽厚比板件组成的薄柔构件以取得良好的经济性。如能在此类薄柔型轻钢框架结构抗震分析中引入节约资源的再生混凝土墙板，并考虑其与结构的共同作用，将会促进轻钢结构住宅产业的进一步发展。.本项目采用试验研究、数值模拟和理论分析相结合的方法，对再生混凝土墙板-轻钢住宅薄柔框架体系的受力性能进行系统研究，以明确再生混凝土墙板与薄柔钢框架共同工作的机理，建立墙板与框架共同作用的非线性分析方法，明确墙板与钢框架连接节点的构造与相应的理论和数值模型，分析节点的破坏特征以及墙体对框架结构稳定承载能力、刚度和耗能能力的影响，提出内嵌和外挂再生混凝土墙板的薄柔钢框架结构层间位移建议值和抗侧刚度简化公式，提出在整体结构中考虑局部屈曲和轻质墙体刚度影响的简化方法，为轻型住宅薄柔钢框架结构分析和设计提供依据。

近两年国家出台了一系列文件发展装配式建筑技术，装配式建筑作为用预制部品部件在工地装配而成的建筑是建造方式的重大变革，有利于节约资源能源、减少施工污染、提升劳动生产效率和质量安全水平，有利于促进建筑业与信息化工业化深度融合、培育新产业新动能、推动化解过剩产能。装配式建筑中预制墙板是非常重要的组成部分，本项目初步研制的采用建筑垃圾生产粗、细骨料全再生轻质混凝土墙板，解决了建筑垃圾的处理问题，缓解了建筑骨料供求之间的矛盾，减少自然资源和能源的消耗，具有显著的社会、经济和环境效益。针对安装有粗、细骨料全再生混凝土墙板的单跨双层轻型住宅薄柔钢框架进行了研究，以有限元分析为平台，在对考虑局部屈曲和墙体刚度影响的薄柔钢框架进行全过程非线性分析的基础上，进行了双层单跨平面薄柔空钢框架及内嵌轻质全再生混凝土墙体的薄柔钢框架结构在低周反复荷载下的试验。分析了粗细骨料全再生轻质混凝土墙板-薄柔轻型钢结构住宅薄柔框架的工作性能，明确了墙体与框架共同工作时的强度、刚度匹配关系、内力转换机制和耗能情况；分析了结构体系的受力机制和抗震破坏机理，建立了弹性状态及弹塑性状态下含各参数影响的等效单斜杆和等效多斜杆简化理论模型，确定了再生混凝土墙板对薄柔钢框架抗侧刚度的贡献值，提出了带轻质墙板的薄柔钢框架结构层间位移建议值；在连接节点构造与相应的理论和数值模型的基础上，提出在整体结构中考虑局部屈曲和再生混凝土墙体刚度影响的简化分析和设计方法。本项目研究提出的简化模型、层间位移角限值等结果对于此类结构体系的设计提供了依据，在一定程度上可以推动轻钢结构住宅的快速发展。