详情

Bidiretional-Ductile End Diaphragms for Seismic Performance and Substructure Protection

项目名称：	Bidiretional-Ductile End Diaphragms for Seismic Performance and Substructure Protection
摘要：	This project will develop bi-directional ductile diaphragms for implementation in straight and skewed bridge superstructures to provide resistance to bidirectional earthquake excitations. Work in Stage 1 will involve non-linear time-history dynamic analyses to investigate the seismic performance of bridges with the proposed bi-directional ductile diaphragm concept, considering variations in skew, span length, reactive mass, fundamental period of vibration, and earthquake excitation characteristics. The dynamic analyses will allow investigating the impact of these parameters on global behavior as well as an understanding of the magnitude of local demands and the extent of bi-directional displacements that the hysteretic devices must be able to accommodate while delivering their ductile response. Work will also be conducted to identify effective and practical details for hysteretic energy dissipating devices. The outcome of this stage will be an understanding of expected dynamic seismic performance as a function of key design parameters, and details for the proposed energy dissipated elements to be investigated in Stage 2. Work in Stage 2 will involve scaled experiments to subject selected device and connection details to a regime of relative end-displacements representative of the results predicted from parametric analytical studies. Actual materials will be used and practical limits will be respected. The tests will be conducted in a quasi-static mode and the experiment will be designed based on the recommendations of the collaborating departments of transportation (DOTs). The outcome of this stage will be viable hysteretic devices and connections schemes, as well as a preliminarily designed prototype to provide an understanding of what would be entailed to conduct shake-table testing of a span constructed with the proposed ductile diaphragm concept. Collaborating DOTs will be solicited to contribute to shake-table testing. The final report will provide relevant data and recommended design requirements.
状态：	Active
资金：	125000.00
资助组织：	Federal Highway Administration<==>American Association of State Highway & Transportation Officials (AASHTO)<==>National Cooperative Highway Research Program (NCHRP) Innovations Deserving Exploratory Analysis (IDEA)
项目负责人：	Jawed, Inam
执行机构：	State University of New York, Buffalo
开始时间：	20141209
主题领域：	Bridges and other structures；Design；Geotechnology；Highways