李勇, 闫维明, 刘晶波, 解梦飞. 近断层高架连续梁桥地震易损性与振动台试验研究[J]. 工程力学, 2018, 35(4): 52-60,86. DOI: 10.6052/j.issn.1000-4750.2017.03.0236
引用本文: 李勇, 闫维明, 刘晶波, 解梦飞. 近断层高架连续梁桥地震易损性与振动台试验研究[J]. 工程力学, 2018, 35(4): 52-60,86. DOI: 10.6052/j.issn.1000-4750.2017.03.0236
LI Yong, YAN Wei-ming, LIU Jing-bo, XIE Meng-fei. SEISMIC VULNERABILITY ANALYSIS AND A SHAKING TABLE TEST OF A NEAR-FAULT CONTINUOUS VIADUCT[J]. Engineering Mechanics, 2018, 35(4): 52-60,86. DOI: 10.6052/j.issn.1000-4750.2017.03.0236
Citation: LI Yong, YAN Wei-ming, LIU Jing-bo, XIE Meng-fei. SEISMIC VULNERABILITY ANALYSIS AND A SHAKING TABLE TEST OF A NEAR-FAULT CONTINUOUS VIADUCT[J]. Engineering Mechanics, 2018, 35(4): 52-60,86. DOI: 10.6052/j.issn.1000-4750.2017.03.0236

近断层高架连续梁桥地震易损性与振动台试验研究

SEISMIC VULNERABILITY ANALYSIS AND A SHAKING TABLE TEST OF A NEAR-FAULT CONTINUOUS VIADUCT

  • 摘要: 与远场地震动相比,近断层地震动长周期成分丰富、存在速度大脉冲效应,对柔性结构桥梁具有更高的震损能力。高架连续梁桥是一种常见的桥梁结构型式,距离断层较近时在地震中可能会发生更为严重的破坏。以一座典型四跨高架连续梁桥为例,对比了远场地震动和含速度脉冲近断层记录输入下的地震易损性规律,并通过缩尺模型振动台试验得到了典型近断层地震动输入下的动力响应。结果表明:与远场或设计地震动相比,含速度脉冲的近断层地震动输入下高架连续梁桥的地震易损性更高,在分析桥梁系统易损性时应综合考虑桥墩和支座的损伤指标,振动台试验结果验证了典型近断层地震动输入下高架连续梁桥动力响应更大。

     

    Abstract: Compared with far-field earthquake records, near-fault earthquake records contain long-period components and large velocity pulses which can lead to more severe seismic damage of flexible bridges. Continuous viaducts are a common type of bridge and suffer more if they are close to seismic faults. Seismic vulnerability analysis was conducted on a typical four-span continuous viaduct subjected to near-fault and far-field earthquake record inputs. Subsequently, a shaking table test was conducted to obtain dynamic responses of the viaduct under typical near-fault earthquake excitations. The analysis results showed that the vulnerability under near-fault earthquake excitations with velocity pulses was higher than that under far-field or design seismic record inputs. For seismic vulnerable analysis of bridge systems the damage measures of piers and bearings should be taken into consideration synthetically. The shaking table test also showed that the tested dynamic response subject to typical near-fault earthquake records was higher than that subject to far-field or artificial earthquake records.

     

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