摘要
为了克服CCIP-016和SCI P354两个楼板振动舒适度设计指南的动载因子保证率不同而导致的结构反应计算结果不同，提出了基于随机步行荷载和烦恼率的楼板振动舒适度评价方法。考虑步行荷载各参数的随机性，生成随机步行荷载时程，经过大量时程分析得到结构最大均方根加速度反应的累积概率分布，然后结合现行舒适度标准，计算烦恼率期望值，进行舒适度评价。对实际结构的计算结果表明，采用CCIP-016或SCI P354计算得到的最大均方根加速度发生的概率很小，作为结构人致振动反应的代表值进行舒适度评价是不合适的。该方法是基于概率的方法，不用考虑动载因子的保证率，比现行方法采用单一的结构反应值进行舒适度评价更有说服力。
Abstract
In order to overcome the problem induced by different exceeding probability of dynamic load factors used in CCIP-016 and SCI P354, vibration serviceability assessment method for floor structures based on random walking force and annoyance rate is proposed. Randomness of the parameters in walking force is taken into account to construct random walking force time histories, and then cumulative probability of the maximum RMS (Root Mean Square) acceleration responses of the structure is found through a large number of time history analyses. Then vibration serviceability of the structure is assessed using expectation of annoyance rate. The calculation results of an actual structure show that the maximum RMS acceleration responses obtained by CCIP-016 and SCI P354 have a small probability of occurrence, so it is not suitable to use as the representative value of human-induce vibration. The proposed method is built on the basis of probability, and has no relationship with the exceeding probability of dynamic load factors, so it is more convincing than the present methods.
关键词
振动 /
舒适度评价 /
随机步行荷载 /
烦恼率
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Key words
vibration /
vibration serviceability assessment /
random walking force /
annoyance rate
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申选召;滕 军.
基于随机步行荷载和烦恼率的楼板振动舒适度评价方法研究[J]. 振动与冲击, 2012, 31(22): 71-75
Shen Xuan-zhao;Teng Jun.
Study on vibration serviceability assessment method for floor structuresbased on random walking force and annoyance rate[J]. Journal of Vibration and Shock, 2012, 31(22): 71-75
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脚注
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