Full-Scale Composite Sandwich Walls: Theory and Behavior

全尺寸复合夹芯墙：理论与行为

• 批准号: 9215567
• 负责人: Max Porter
• 金额: $ 20.73万
• 依托单位: Iowa State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-01-15 至 1997-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9215567&HistoricalAwards=false
• 关键词: Full; Scale; Composite; Sandwich; Walls

Reinforced concrete composite sandwich wall systems are becoming very popular due to the many benefits of combining lateral, gravity and in-plane loads along with the thermal benefits of the insulated sandwich construction. These walls typically consist to two layers (wythes) of reinforced (or prestressed) concrete sandwich around a middle layer of insulation, providing sufficient R-rating for thermal efficiency. In order to maintain the insulated rating and to prevent a thermal short-circuit, non-metallic tie connectors, such as fiber-composite ties are required. The objective of this research is to determine the amount of composite action resulting in the sandwich system subjected to lateral and bearing loads. This objective entails the development of the commensurate analytical tools coupled with the experimental tests to verify the theory. approximately 32-ft long wall tests subjected to lateral or bearing loads will be conducted. Industry collaboration and cooperation is a key element in shared cost and participation in this project. This research is expected to result in a theoretical model for analysis os future walls, behavioral characteristics (including amount of composite action), design recommendations, and potential provisions for inclusion in new design standards.

钢筋混凝土复合夹芯墙体体系因其结合了侧向荷载、重力荷载和面内荷载的诸多优点以及保温夹层结构的热效益而变得非常流行。这些墙通常由两层(怀特)钢筋(或预应力)混凝土夹层组成，围绕着中间的保温层，为热效率提供了足够的R级。为了保持绝缘额定值并防止热短路，需要非金属连接件，如纤维复合材料连接件。这项研究的目的是确定夹层体系在横向载荷和承重载荷作用下的复合作用力。这一目标需要开发相应的分析工具，并结合实验测试来验证理论。将进行约32英尺长的侧向或承重荷载的墙体试验。行业协作和合作是分担成本和参与该项目的关键因素。这项研究有望产生一个理论模型，用于分析未来的墙、行为特征(包括复合作用力的大小)、设计建议以及可能纳入新设计标准的条款。