气候适宜性低层农房装配式轻钢-轻墙结构抗震性能与机理

Climate-suitability rural residence with earthquake resistant and energy dissipation-assembled light steel- light wall structure- is presented, in which light-steel skeleton bears the vertical load, at the same time, light steel - light wall work together to resist the horizontal load.Light wall is composed of main slab and function slab. Recycled concrete slab with main-rebar wire mesh is made as main slab, the main slab and EPS preservation module is prefabricated as integrated seismic-insulation slab, besides, composite-gypsum thin-board is adopted as function slab. Considering characteristics of five different climate zones and simplified structure: severe cold and cold regions, main slab and EPS preservation module are jointed to the outside of light-steel skeleton to prevent the cold bridge effect; warm, hot summer and cold winter, hot summer and warm winter areas, main slab is connected to the outside of light-steel skeleton. The research contents: the seismic performance test will be conducted to the structure unit and wall specimens of assembly light steel-light wall under low-cyclic loading, moreover, based on theory analysis and numerical simulation, the load bearing capacity, stiffness, ductility, hysteresis performance, energy dissipation, damage evolution process and failure characteristics with different constructions will be studied, and the seismic mechanism will be revealed.Load-bearing capacity model and resilience model will be discussed; the numerical calculation model of typical wall structure will be established, and the influence rule of different design parameters of the wall on the aseismic performance of the whole structure will be analyzed, at the same time, the match between wall-design-parameter and light-steel skeleton will be optimized; the seismic design method and construction measurement will be presented.

提出气候适宜性农房装配式轻钢-轻墙抗震节能结构。竖向荷载主要由轻钢骨架承担，水平荷载主要靠轻钢-轻墙共同工作抵抗。轻墙由主体墙板和功能墙板组成。主体墙板采用主筋型钢丝网再生混凝土墙板，它与EPS保温模块预制成抗震保温一体化墙板，功能墙板采用复合石膏薄板。考虑我国五个不同气候区特点并简化构造：严寒、寒冷地区，主体墙板与EPS保温模块从外侧与轻钢骨架连接，以防冷桥作用；温和、夏热冬冷、夏热冬暖地区，主体墙板从外侧直接与轻钢骨架连接。研究内容：装配式轻钢-轻墙结构单元及墙体试件低周反复荷载试验研究、理论分析和数值模拟，分析不同参数墙体的承载力、刚度、延性、滞回特性、耗能、损伤演化过程和破坏机制，揭示抗震机理，提出墙体承载力计算模型和恢复力模型；建立典型墙体结构的数值分析模型，计算分析不同墙体设计参数对结构整体抗震性能的影响规律，优化墙体与轻钢骨架匹配设计参数；提出结构抗震设计方法与构造措施。

装配式建筑在城市多层、高层结构中发展较快，然而装配式绿色农房结构发展极不协调。为了适应国家绿色农房建设发展战略，研发气候适宜性低层农房抗震节能一体化结构关键技术已成农村建设的重大需求。本项目成果适应了量大面广的装配式绿色农房轻钢结构发展的需要。本项目的贡献概要： .较系统完成了6个不同梁柱节点型式的装配式轻型钢管再生混凝土框架试件，并基于最优的双L型带加劲肋节点的构造形式，完成了25个装配式轻钢-轻墙抗震节能结构。研究了轻墙分布钢筋间距、暗支撑设置、EPS保温模块对结构损伤演化过程、滞回特性、承载力、延性、刚度、耗能性能的影响，提出了恢复力模型和斜截面承载力计算公式。给出了其抗震设计方法与构造措施。.该研究创新了独特构造的双L型带加劲肋节点的装配式轻钢再生混凝土框架结构形式。研发了明显两道抗震防线的“装配式轻型钢管再生混凝土柱框架-轻钢组合墙结构体系”。轻钢组合墙作为第一道抗震防线，轻型钢管再生混凝土柱框架为第二道抗震防线，轻钢组合墙为抗震的主体，轻钢框架主要承担竖向荷载，设计中可通过调整轻钢组合墙的设置来满足不同烈度下的抗震需求。 .研发的装配式轻钢-轻墙抗震节能结构体系，突破了以往轻钢框架墙体和连接节点构造复杂，成本较高，只有框架一道抗震防线的特点，抗震保温性能好，性价比合理，利用建筑垃圾资源化建材和轻钢建材的装配式抗震节能一体化低层房屋结构，具有广阔应用前景,具有重要科学意义和工程价值。