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Assessment of Seismic Demand Due to Torsional Ground Motions on Symmetric Skew Bridges
Journal of Earthquake Engineering ( IF 2.6 ) Pub Date : 2020-09-21 , DOI: 10.1080/13632469.2020.1822224
Ecem Özşahin 1 , Gökhan Pekcan 1
Affiliation  

ABSTRACT

Potential effects of torsional components of ground motions (TGM) on the overall seismic response of symmetric skew highway bridges have been investigated. Analyses were conducted for various skew angles, plan dimensions, deck-abutment gap sizes, dynamic properties, and soil types (B and D). The models included nonlinear impact between deck-abutment explicitly. It was demonstrated that seismic response of symmetric highway bridges are amplified consistently due to TGM components for all considered parameters. It is further suggested that a systematic definition of “accidental eccentricity” in terms of system dynamics, geometry, and associated design spectral response may be used in lieu of analysis.



中文翻译:

对称斜桥上的扭转地面运动引起的抗震需求评估

摘要

研究了地震动扭转分量 (TGM) 对对称斜交公路桥梁整体地震响应的潜在影响。对各种倾斜角度、平面尺寸、桥台-桥台间隙尺寸、动态特性和土壤类型(B 和 D)进行了分析。这些模型明确包括甲板桥台之间的非线性影响。结果表明,对称公路桥梁的地震响应由于所有考虑参数的 TGM 分量而被一致地放大。进一步建议,可以使用系统动力学、几何形状和相关设计光谱响应方面的“意外偏心”的系统定义来代替分析。

更新日期:2020-09-21
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