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以工程实例群桩基础为背景,采用Pushover分析方法,建立群桩基础弹塑性分析模型,分析了冲刷效应、设置斜桩、增加桩基配筋率三种因素对群桩基础抗震能力的影响。结果表明,群桩基础屈服和极限状态对应的侧向抗力与水平位移对冲刷深度有着较强的敏感性;设置斜桩和适当增加桩基配筋率能在一定程度上改善群桩基础的抗震能力。
Based on the pile group foundation of engineering example, Pushover analysis method was used to establish the elasto-plastic model of pile group foundation, and the influence of three factors of erosion effect, setting inclined pile and increasing pile reinforcement ratio on the seismic capacity of pile group foundation was analyzed. The results show that lateral resistance and horizontal displacement corresponding to yield and ultimate state of group pile foundation are highly sensitive to scouring depth. Setting up inclined pile and increasing reinforcement ratio of pile foundation can improve the anti-seismic performance of pile group foundation to a certain extent ability.