人致激励下装配式竹集成材空心楼板舒适度试验研究

Experimental Study on Comfort under Pedestrian Loads of Laminated Bamboo Prefabricated Hollow Decks

进行了人致激励下装配式竹集成材空心楼板的舒适度试验,选用了自振频率与峰值加速度为舒适度的评价指标。利用了抬脚跟激励方式来获得楼板在不同工况条件下的自振频率,分析了人行荷载作用下楼板动力响应,可以发现:空载时楼板自振频率都超过规定限值(3Hz)的6倍,负载时楼板的自振频率也都超过10 Hz;所有工况人行激励试验的楼板峰值加速度都小于0.015g,跨度小、两端铰接的楼板动力响应加速度值最大,跨度大、两端固接时板的峰值加速度最小。结果表明装配式竹集成材空心楼板满足舒适度要求。

Comfort test on laminated bamboo prefabricated hollow decks under the pedestrian load was conducted.Based on authoritative home and aboard, peak acceleration and natural frequency are selected as comfort evaluation criteria.Natural frequency of hollow decks in different working conditions is acquired by lifting heels, vibration responses of decks under human walking loads are analyzed. It can be found that the natural frequency of decks is 6 times higher than specified 3Hz when the decks were without load , more than 10Hz when loading. Peak acceleration of decks in different work conditions is less than 0.015 g, vibration response acceleration of the deck with small span and both ends hinged is the largest, and the peak acceleration is the smallest when the span is large and fix hinge supports at both ends. as a consequence, the laminated bamboo prefabricated hollow decks meet the requirement of comfort.