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您的检索式：作者名="Larry A.Fahnestock"
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| 1 | Ductility demands on buckling-restrained braced frames under earthquake loading显示文摘Accurate estimates of ductility demands on buckling-restrained braced frames (BRBFs) are crucial to performance-based design of BRBFs. An analytical study on the seismic behavior of BRBFs has been conducted at the ATLSS Center, Lehigh University to prepare for an upcoming experimental program. The analysis program DRAIN-2DX was used to model a one-bay, four-story prototype BRBF including material and geometric nonlinearities. The bucklingrestrained brace (BRB) model incorporates both isotropic and kinematic hardening. Nonlinear static pushover and timehistory analyses were performed on the prototype BRBF. Performance objectives for the BRBs were defined and uscd to evaluate thc time-history analysis results. Particular emphasis was placed on global ductility demands and ductility demands oa the BRBs. These demands were compared with anticipated ductility capacities. The analysis results, along with results from similar previous studics, are used to evaluate the BRBF design provisions that have been recommended for codification in the United States. Thc results show that BRB maximum ductility demands can be as high as 20 to 25. These demands significantly exceed those anticipated by the BRBF recommended provisions. Results from the static pushover and timehistory analyses are used to demonstrate why the ductility demands exceed those anticipated by the recommended provisions.The BRB qualification testing protocol contained in the BRBF recommended provisions is shown to be inadequate because it requires only a maximum ductility demand of at most 7.5. Modifications to the testing protocol are recommended. | Larry A.Fahnestock Richard Sause James M.Ricles Le-Wu Lu | 2003 | Earthquake Engineering and Engineering Vibration2003，2，2： | 11 |
| 2 | Assessment of buckling-restrained braced frame reliability using an experimental limit-state model and stochastic dynamic analysis显示文摘制止扣环的背带(BRB ) 最近用作地震 lateral-force-resisting 系统的主要成员在美国变得流行。BRB 是不在压缩弄弯,但是相反在紧张和压缩让步的钢钩住。尽管为 BRB 应用程序的设计指南被开发了,为估计性能和确定的可靠性的系统的过程仍然被需要。这篇论文为估计制止扣环的 braced 论述一个分析框架框架(BRBF ) 可靠性当使遭到了到地震负担时。这个框架高效地确定 BRB 失败的风险由于 BRB 核心的低周期的疲劳骨折。过程包括一系列部件那:(1 ) 确定以 BRB,核心变丑历史通过随机的动态分析产生了的 BRB 需求;(2 ) 确定 BRB 的限制状态以它基于一个试验性的数据库仍然是累积塑料韧性能力;并且(3 ) 评估 BRB 失败的概率,给确定的需求和能力,通过结构的可靠性分析。参量的研究被进行在钩住失败的概率上调查 BRB 和 BRBF 的地震负担,和特征的效果。另外,脆弱弯(即,钩住失败的有条件的可能性摇紧张参数撤退) 被建议框架创造。当在这篇论文介绍的框架被用于对 BRBF 的评价时,框架部件的模块化的性质允许申请到另外的结构的部件和系统。 | Blake M.Andrews Junho Song Larry A.Fahnestock | 2009 | Earthquake Engineering and Engineering Vibration2009，8，3： | 1 |
| 3 | Seismic behavior assessment for design of integral abutment bridges in Illinois显示文摘Integral abutment bridges(IABs)minimize deterioration and degradation of the abutment seats and bearings due to water,dirt,and deicing chemicals by eliminating bearings and expansion joints.Although the continuity between superstructure and abutments in an IAB is beneficial for reducing maintenance costs,it leads to more complex behavior under strength and service loading(temperature and traffic)and extreme loading(earthquake).The coupling of superstructure and substructure behavior necessitates system-level analysis of IABs.Prior seismic IAB studies have typically investigated the behavior of individual IAB components,however a gap of knowledge has developed due to the lack of studies and investigation about the behavior of all IAB components and their interactions with each other in a single analysis model.This study uses nonlinear static and dynamic analyses to investigate and assess the seismic behavior of IABs typical to the state of Illinois.The analyses aim to bridge the gap of knowledge by evaluating IABs as a whole and utilizing the results to indicate potential vulnerabilities in the design and construction of IABs in Illinois during design-level and larger seismic events,which could not be identified by component-level IAB analyses alone. | Derek L.Kozak Larry A.Fahnestock James M.LaFave | 2022 | Earthquake Engineering and Engineering Vibration2022，21，2： | 0 |
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