摘要
为了解决承台-桩系统在低应变测试中的三维干扰和缺陷分析问题,建立了承台-桩系统的三维振动模型。利用交错网格有限差分法求解三维波动方程并得到了承台-桩系统的数值计算结果。通过对比计算结果与实测结果,验证了该数值计算的可行性与可靠性。由于模拟曲线和实测曲线具有较好的一致性,采用响应对比法,分析完整桩和缺陷桩在承台表面的承台-桩系统低应变曲线。结果表明:通过响应对比法分析采集的承台表面低应变曲线能够较为准确地识别出基桩中的缺陷信号。
A three-dimensional vibration model of platform-pile system is proposed to solve the three-dimensional interference and defect analysis of platform-pile system in the low strain impact integrity testing.The three-dimensional elastic wave equations are solved by using staggered grid finite difference method to obtain the numerical solution of platform-pile system,and the numerical and measured curves were compared,hence verified the feasibility and reliability of the numerical calculation.Since the two curves are in good consistency,a response contrast method is proposed to analyze the low strain curves at the surface of platform-pile system of intact and defective piles.The results show that the low strain curves at the surface collected by the response contrast method can identify the defect signals in the piles more accurately.
作者
姜静
俞磊
王威
JIANG Jing;YU Lei;WANG Wei(School of Construction and Landscape,Xuancheng Vocational and Technical College,Xuancheng 242000,China)
出处
《安徽建筑大学学报》
2023年第4期29-34,63,共7页
Journal of Anhui Jianzhu University
基金
安徽省高校优秀青年人才支持计划项目(gxyq2022239)
安徽省教育厅自然科学研究重点项目(KJ2020A1012)
宣城职业技术学院科研振兴计划提升项目(ZXTS202110)。
关键词
承台-桩系统
低应变完整性检测
响应对比法
三维模型
platform-pile system
low strain impact integrity testing
response contrast method
three-dimensional model
