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大跨度结构的人致振动问题近年来逐渐受到人们的重视。对车站结构中各种可能人行活动下的荷载模式及荷载特性进行了研究。基于候车厅行人在行走、候车、检票进站等情况下的活动特点,对单人行走、座椅起立、下蹲-起立、高处跳下等工况进行了步行力测试,并对测试结果进行了统计分析,得到了各工况下的荷载特性描述。结果表明:1)实测中国人步行力的动载因子小于欧美学者的建议取值,即基于欧美人群步行测试结果的人行荷载取值偏于保守;2)座椅起立时,单人竖向动荷载幅值可达静态体重的2倍,因此,对于大跨轻柔结构,人群集体座椅起立时可能会引起结构的较大振动。研究成果可为人行荷载特性研究和结构的人致振动研究提供参考。
People-induced vibration of long-span structures has drawn increasing attention in recent years. The load pattern and load characteristics under various possible pedestrian activities in the station structure were studied. Based on the characteristics of the activity of the waiting room pedestrians in the conditions of walking, waiting and check-in, the walking force test was carried out on the conditions of single-person walking, standing upright, squatting-standing, jumping off from height, etc. The test results The statistical analysis was carried out, and the load characteristics of each condition were obtained. The results show that: 1) The measured factor of Chinese walking force is less than the suggested value of European and American scholars, that is, the value of pedestrian load is conservative based on the walking test results of European and American populations; 2) When the seat is upright, Load amplitude up to 2 times the static weight, therefore, for large-span soft structure, crowd collective seat upright may cause greater vibration of the structure. The research results can provide reference for the study on the pedestrian load characteristics and the structure-induced human induced vibration.