Effect of various aspects on the seismic performanceof a curved bridge with HDR bearings

IF 1.4 4区 工程技术 Q3 ENGINEERING, CIVIL
P. Gupta, G. Ghosh
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引用次数: 7

Abstract

The performance of an isolated horizontally curved continuous bridge with High Damping Rubber (HDR) Bearings has been investigated under seismic loading conditions. The effectiveness of response controls of the bridge by HDR bearings for various aspects viz. variation in ground motion characteristics, multi-directional effect, level of earthquake shaking, varying incidence angle, have been determined. Three recorded ground motions, representative of historical earthquakes along with near-field, far-field and forward directivity effects, have been considered in the study. The efficacy of the bearings with bi-directional effect considering interaction behavior of bearing and pier has also been investigated. Modeling and analysis of the bridge have been done by finite element approach. Sensitivity studies of the bridge response with respect to design parameters of the bearings for the considered ground motions have been performed. The importance of the nonlinearity of HDR bearings along with crucial design parameters has been identified. It has been observed that the HDR bearings performed well in different variations of ground motions, especially for controlling torsional moment. However, the deck displacement has been found to be increased significantly in case of Turkey ground motions, considering forward directivity effect, which needs to be paid more attention from designer point of view.
不同方面对HDR支座曲线桥抗震性能的影响
研究了高阻尼橡胶支座隔震水平弯曲连续桥在地震荷载作用下的性能。已经确定了HDR轴承对桥梁各个方面的响应控制的有效性,即地面运动特性的变化、多向效应、地震震动水平、不同入射角。研究中考虑了三种有记录的地面运动,它们代表了历史地震以及近场、远场和正向方向性效应。还研究了考虑支座和桥墩相互作用行为的双向效应支座的有效性。采用有限元方法对该桥进行了建模和分析。针对所考虑的地面运动,对桥梁响应与支座设计参数进行了敏感性研究。HDR轴承非线性的重要性以及关键的设计参数已经确定。据观察,HDR轴承在不同的地面运动变化中表现良好,尤其是在控制扭矩方面。然而,考虑到正向方向性效应,在土耳其地面运动的情况下,甲板位移显著增加,这需要从设计师的角度给予更多关注。
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来源期刊
Earthquakes and Structures
Earthquakes and Structures ENGINEERING, CIVIL-ENGINEERING, GEOLOGICAL
CiteScore
2.90
自引率
20.00%
发文量
0
审稿时长
>12 weeks
期刊介绍: The Earthquakes and Structures, An International Journal, focuses on the effects of earthquakes on civil engineering structures. The journal will serve as a powerful repository of technical information and will provide a highimpact publication platform for the global community of researchers in the traditional, as well as emerging, subdisciplines of the broader earthquake engineering field. Specifically, some of the major topics covered by the Journal include: .. characterization of strong ground motions, .. quantification of earthquake demand and structural capacity, .. design of earthquake resistant structures and foundations, .. experimental and computational methods, .. seismic regulations and building codes, .. seismic hazard assessment, .. seismic risk mitigation, .. site effects and soil-structure interaction, .. assessment, repair and strengthening of existing structures, including historic structures and monuments, and .. emerging technologies including passive control technologies, structural monitoring systems, and cyberinfrastructure tools for seismic data management, experimental applications, early warning and response
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