不同地震工况下双柱式桥梁桩柱最优配筋率分析研究

Study on Optimal Reinforcement Ratio of Double-column Bridge Piles under Different Seismic Conditions

摘要:

地震损毁作为公路常规双柱式桥梁常见的重大病害之一，受到越来越多学者的关注，但基于工程实体探究桥梁墩柱、桩基满足抗震性能的最优配筋率的研究相对较少。针对甘肃省常见的4种地震工况，通过有限元软件系统分析不同尺寸双柱式桥墩满足抗震需求的控制指标，确定了关键模型和9种最不利安全系数，从而进一步得到4种地震工况下桥梁墩柱、桩基的最优配筋率。所得结论可供工程师在实际工程中参考应用，为更科学合理地确定桥梁墩柱、桩基的配筋提供支撑。

Abstract:

Seismic damage, as one of the common major diseases of highway conventional double-column bridges, has been increasingly concerned by many scholars, but based on the actual engineering, few studies have been conducted to explore the optimal reinforcement ratio of bridge piers and pile foundations to satisfy the anti-seismic performance. For four common seismic conditions in Gansu Province, the different sizes of double-column bridge piers are systematically analyzed through a finite element software to satisfy the control indexes of anti-seismic demand, and the key model and nine most unfavorable safety factors are identified so as to further obtain the optimal reinforcement ratio of the bridge piers and pile foundations under four types of seismic conditions. The conclusion can be used by the engineers for reference in actual projects, which provides the support for more scientific and reasonable determination of reinforcement for bridge piers and pile foundations.