Innocative Hybrid Shear Walls with Steel Columns and HPFRCC Coupling-Beam Damper Elements.

[9809712 . naaman]该项目的总体目标是研究一种用于钢-混凝土组合结构的新型创新抗震剪力墙系统。墙体由两个边缘钢柱组成，由hpfrcc耦合梁-阻尼器单元连接。hpfrcc（高性能纤维增强复合材料）提供可选的性能组合，如强度，韧性，能量，吸收，刚度，延展性和阻尼阻力。它们在结构应用中的意义尤其有益，特别是在考虑地震载荷的情况下。新的墙体系统是作为一个横向荷载抵抗元件，而耦合梁阻尼元件（CBDE）作为由HPFRCC材料制成的能量，并被设计为通过剪切摩擦机制消散能量。它们的有效跨深比小于常规耦合梁，并且在中部开槽和缺口以确保所需的性能。该系统的优点包括可预制性、可替换性、耐久性和生命周期成本效益。建议的墙体系统非常适合与钢框架结合使用其他建筑材料和系统，如预制预应力混凝土结构或现场混凝土结构。研究的主要任务是：1)设计、测试和评估一些耦合梁-阻尼器单元（CBDE）在模拟地震荷载下的性能；2)建立一个简单的分析模型来模拟它们的行为；3)为其设计制定一些初步的指导方针，以便在评估中的新剪力墙体系中实施。

9809712NaamanThe overall objective of this project is to study a new and innovative seismic shear wall systemfor use in composite steel-concrete structures. The wall is made from two edge steel columns connected by HPFRCCs coupling beam-damper elements. HPFRCCs (High Performance Fiber Reinforced Coment Composites) offer optional combinations of properties such as strength, toughness, energy, absorption, stiffness, ductility and damping resistance. Their implications in structural applications can be particularly beneficial, especially when seismic loads are considered. The new wall system is meant as a lateral load resisting element whereas the coupling beam-damper elements (CBDE) act as energy made from HPFRCC materials and are designed to dissipate energy by a shear-friction mechanism. They have an effective span-to-depth ratio smaller than that of regular coupling beams and have slotted and notched mid-section to insure the desired behavior. Advantages of the system include prefabrication, replaceability, durability, and life cycle cost effectiveness. The proposed wall system is very well suited for use with steel framed integrated with other construction materials and systems such as precast-prestressed concrete structures or case in place concrete structures.The main tasks of the research are: 1) to design, test, and evaluate the performance, of a number of coupling beam-damper elements (CBDE) subjected to simulated seismic loads, and 2) to develop a simple analytical model simulating their behavior; and 3) to draw some preliminary guidelines on their design in order to allow their implementation in the new shear-wall system under evaluation.