详情

Shake Table Studies of a Bridge System with ABC Connections

项目名称：	Shake Table Studies of a Bridge System with ABC Connections
摘要：	Accelerated bridge construction (ABC) connections for prefabricated members are particularly critical in moderate and high seismic zones because earthquake forces place high demand on inelastic deformation of adjoining columns. Structural integrity of the bridge has to be maintained by capacity-protected connections that experience no or little damage. Various ABC connections have been developed and investigated in the past few years. Because of the critical role of bridge columns, the majority of these connections are for column ends at foundation and cap beams. In addition to column connections, superstructure to pier cap connections are also important to ensure that no plastic deformations are developed within the superstructure. Five general types of ABC column connections have been developed, each with a variety of details: (1) Grouted Duct (GD) Connections; (2) Mechanical Bar Splices; (3) Pocket Connections; (4) Pipe Pin Connections; (5) Rebar Hinge Connections. Several superstructure precast concrete or steel girder to pier cap seismic connections have been also investigated with mechanisms to provide positive moment capacity at the superstructure-cap beam interface. The overall objective of the proposed study is to investigate the seismic performance of a large-scale bridge system that integrates some of the more promising ABC connections that have been proof tested as individual components. The selection of the connections will be based on the latest state-of-the-art review and feedback from other ABC-University Transportation Center (UTC) researches, the ABC-UTC-Seismic steering committee, and the American Association of State Highway and Transportation Officials (AASHTO) T-3 committee. A two-span bridge model with concrete substructure, steel girders, and concrete deck panels is envisioned. The bridge model will be supported on three shake tables at University of Nevada, Reno (UNR) and will be subjected to bidirectional horizontal seismic loading simulating representative earthquake records. Based on the results, interaction of various connections will be studied in detail and recommendations will be made for necessary refinement and implementation of ABC connections.
状态：	Completed
资金：	0
资助组织：	Office of the Assistant Secretary for Research and Technology
执行机构：	University of Nevada, Reno
主要研究人员：	Itani, Ahmad
开始时间：	20150815
预计完成日期：	0
实际结束时间：	20190401