游客活动对大境门古城墙振动影响的试验研究

摘要

Based on the background of the ancient city wall of Dajingmen of Zhangjiakou, this papersimulates crowd load by organizing visitors to take part in the on-site activities, and conducts fieldtests to study the impact of tourists'activities on vibration of the ancient city wall.The vibrationof walking, running and jumping in regular and irregular activities is measured.The results showthat the vibration response of the city wall is the largest when tourists jump, followed by runningand jumping.The regular response is greater than the irregular response under the same pattern ofactivity.Compared with relevant regulations, the effect of crowd activities within 50people on theancient wall of Dajingmen is within the permissible range.%以张家口大境门城墙为背景, 通过组织游客现场活动模拟人群荷载, 并进行现场试验, 研究游客活动对古城墙的振动影响.确定下人群数量和密度后, 试验统计了走、跑、跳三种活动方式在有规律和无规律两种情况下活动时的振动情况.结果表明:游客跳的时候城墙的振动响应最大, 其次是跑和走;同种活动方式下有规律比无规律响应大;对比相关规范限值, 50人 (游客密度4-6人/m2) 的人群活动对大境门古城墙的影响在允许范围内.