R/R: Seismic Rehabilitation of Architectural Precast Panels

CMMI-9318776，PI-NIELSON：现有的建筑预制幕墙板可能具有非韧性连接详图，在强震中容易发生故障。 他们也可能经历了钢筋的严重腐蚀。 锚固面板连接插入件的钢筋的腐蚀同样降低了面板连接件的强度和延展性。 该项目进行了一项研究，以调查补救程序，这将增加地震时的地震完整性的板。 制定成功的康复计划是为了满足以下标准：（1）提供足够的强度以抵抗地震规范设计力和由对实际地震地面运动的结构响应产生的力，（2）提供足够的延展性以适应实际的层间漂移，（3）适应包括钢和钢筋混凝土的各种结构框架方案，（4）实用且经济，要求对建筑物功能的破坏最小，以及（5）减少或消除面板钢筋腐蚀的可能性，并且可能减少结构的地震恒载和横向设计载荷。 本文的主要研究工作有：（1）构造和试验非延性节点细部构造。 (2)设计适当的维修方案。 (3)建造和测试维修细节，并验证其性能。 (4)执行全面板维修系统的动态分析。 该项目得到了美国国家科学基金会（NSF）倡议“结构抗震修复和恢复研究”的支持。"

CMMI-9318776, PI-NIELSON: Existing architectural precast curtain wall panels may have nonductile connection details that are prone to failure in strong earthquakes. They also may have experienced significant corrosion of the reinforcing steel. Corrosion of the bars anchoring the panel connection inserts likewise reduces the strength and ductility of the panel connections. This project conducts a study to investigate remedial procedures which will increase the seismic integrity of the panels during earthquakes. Successful rehabilitation schemes are developed to satisfy the following criteria: (1) provide adequate strength to resist both seismic code design forces and forces generated by structural response to actual earthquake ground motions, (2) provide adequate ductility to accommodate realistic interstory drifts, (3) accommodate a variety of structural framing schemes including both steel and reinforced concrete, (4) be practical and economical, requiring minimal disruption of a building's functions, and (5) reduce or eliminate the possibility of corrosion of the panel reinforcement, and possibly reduce the seismic dead load and lateral design load for the structure. Research tasks to achieve these are: (1) Construct and test nonductile connection details. (2) Design appropriate repair schemes. (3) Construct and test repair details and verify their performance. (4) Perform dynamic analyses of full-panel repair systems. This project is supported under the NSF Initiative "Repair and Rehabilitation Research for Seismic Resistance of Structures."