市内激励源对古建筑振动的影响

Research on the influence of city vibration sources on ancient buildings

为了分析在不同激励下振动对古建筑的影响,选择苏州市省级文物保护单位——玉涵堂古建筑进行振动测试。记录了环境振动、地下轨道交通激励、人群社会活动激励和音响激励四种工况时一座两层砖木阁楼的振动信号。发现经过严格振动控制的地下轨道交通激励对古建筑振动的贡献可以忽略;环境振动和音响激励时段古建筑横向振动速度达标,而人群社会活动激励时段横向振动速度超标。从古建筑的建筑结构和功能区域划分以及人的激励形式三个方面对通常被忽视的人的因素进行了探讨,并提出了相应的减振措施。研究成果为其它类似两层砖木阁楼古建筑防护提供依据。

In order to analyze the effects of vibrations from different excitation sources on ancient architecture,e.g.,the Yu Han Tang acnient buildings in the Suzhou provincial cultural relics protection unit were analyzed. The signals of four vibration sources—the environmental,subway,people＇s social activities and sound box—were recorded in a two-story brick-wooden loft. It was found that the effect to ancient buildings of vibration contributed by a subway system having strict vibration controls can be neglected. In Yu Han Tang,the transverse vibration velocities of the environmental vibrations and sound box excitation periods reached the standard level,while the vibrations due to people social in activities exceeded the standard. The structure and function of ancient architecture andthe vibration effects of people（ which are usually ignored） are discussed,and some suggestions for damping these vibration are proposed. This study provides data for protection of similar ancient two-story brick-wooden lofts.