为解决地铁运行引起的邻近砖混结构环境振动问题，以某7 层砖混结构为研究对象，实测隧道内、室外 地面、结构楼板的振动响应，分析振动沿“隧道-地面-结构”的传递规律，并由此提出建筑物内环境振动超标可 能的原因：隧道埋深浅、建筑与隧道距离近且处于同个土层使得土体对振动的衰减效果较差；结构部分楼板共振 导致振动响应超过评价规定的室外地面和室内首层。进一步建立该砖混结构的有限元模型，采用实测柱底竖向加 速度作为荷载，并对比实测楼板响应验证模型的准确性。模拟计算结果证实中间层及顶层楼板的放大效应，并 通过分析获得了楼层数量、层高、板厚、墙厚参数对振动响应空间分布的影响。研究成果对砖混结构的环境振动 评价具有一定参考价值。

This study addresses the environmental vibration issues of adjacent brick-concrete structures induced by subway operations, focusing on a 7-story brick-concrete building as the primary investigation subject. Vibrations were measured at the tunnel, outdoor ground level, and various structural floors to analyze the propagation characteristics along the “tunnel-groundstructure” path. The study aims to identify reasons for vibration levels exceeding standards. Key factors contributing to the issue include the shallow depth of tunnel burial, the proximity of buildings to the tunnel, and their shared soil layer, resulting in inadequate vibration attenuation through the soil. Additionally, resonance effects within specific floor slabs of the structure contribute to vibration responses surpassing evaluation standards outdoors and on the first indoor floor. A finite element model of the brick-concrete structure was constructed using measured vertical accelerations at column bases as loads. The model’s accuracy was validated against measured floor responses, confirming amplification effects on middle and upper floors. Parametric analysis explored the impacts of floor count, story height, slab thickness, and wall thickness on the spatial distribution of vibration responses. The findings from this study provide valuable insights for evaluating environmental vibrations in similar structures, offering guidance for mitigating effects and ensuring compliance with vibration standards.

U231；TU311.3

中国铁建股份有限公司科技研发计划项目(2022-A02)