| 姜静,俞磊,王威.响应对比法在承台-桩系统中低应变检测研究[J].安徽建筑大学学报,2023,31(): |
| 响应对比法在承台-桩系统中低应变检测研究 |
| Study on the Low Strain Integrity Testing of Platform-Pile System by Response Contrast Method |
| 投稿时间：2022-10-24 修订日期：2022-11-27 |
| DOI： |
| 中文关键词: 承台-桩系统 低应变完整性检测 响应对比法 三维模型 |
| 英文关键词: platform-pile system, response contrast method, low strain integrity testing, three-dimensional model |
| 基金项目:安徽省2022年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）。 |
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| 中文摘要: |
| 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。通过将该计算结果与承台-桩系统实测结果进行对比，验证了该数值计算的可行性与可靠性。基于上述模拟曲线和实测曲线具有较好的一致性，提出了响应对比法。该方法利用数值模拟曲线与实测曲线进行对比来识别缺陷的目的。分析了在承台表面处采集完整桩和缺陷桩的承台-桩系统的低应变曲线。结果表明：通过响应对比法分析在承台表面采集的低应变曲线能够较为准确的识别出基桩中的缺陷信号。这一研究结果为承台-桩系统基桩完整性检测提供了一种新的思路和方法，具有一定的工程应用价值。 |
| 英文摘要: |
| In order to solve the problem of the three-dimensional effect and defect analysis of platform-pile system, the three-dimensional vibration model of platform-pile system is proposed. The three-dimensional elastic wave equations are solved by using staggered grid finite difference method, and the numerical solution of platform-pile system is obtained. The reliability and feasibility of the numerical computation are verified comparing with measured curve. Based on the fact measured curve has good consistency with simulation one, a response contrast method is proposed. This method uses the simulation curve to identify the purpose of defects with the measured curve. The low strain curve at the surface of platform-pile system is studied. The results show that the response contrast method can more accurately identify the defect signal on the surface of platform-pile system. The research work provides a new method for testing the integrity of platform-pile system and has certain engineering application value. |
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