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

这个项目的总体目标是研究一种用于钢-混凝土组合结构的新的、创新的地震剪力墙体系。墙体由两根边缘钢柱组成，由HPFRCC连梁阻尼器连接。HPFRCC(高性能纤维增强复合材料)提供强度、韧性、能量、吸收、刚性、延展性和阻尼性等性能的可选组合。它们在结构应用中的意义可能特别有益，特别是在考虑地震荷载的情况下。新的墙体体系是一个抗侧向荷载的单元，而耦合梁-阻尼器单元(CBDE)则是由HPFRCC材料制成的能量，并被设计为通过剪切摩擦机制来耗散能量。它们的有效跨高比小于常规连梁，并在中段开槽和开槽，以确保所需的性能。该系统的优点包括预制、可更换、耐用性和生命周期成本效益。本研究的主要任务是：1)设计、试验和评估在模拟地震荷载作用下一些连梁阻尼器构件(CBDE)的性能；2)建立一个简单的分析模型来模拟它们的行为；3)对它们的设计提出一些初步的指导原则，以便在正在评估的新的剪力墙体系中实施它们。

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.