摘要
随着大跨结构的发展,舒适度已成为评价楼盖结构性能的重要指标。针对大跨度空腹夹层板楼盖,考虑行走路线和步行频率影响进行了振动响应计算。分析表明,空腹夹层板的自振特性类似于实心平板,低阶振型主要表现为竖向振动;采用行走路线法评价楼盖舒适度时,应根据实际情况采用较长的路线并使其通过低阶振型中心;定点激励法计算的峰值加速度要低于通过低阶振型中心行走路线的计算结果,据此评价楼盖舒适度是有局限性的;楼盖上不同感受点的加速度响应峰值是不同的,较大的加速度响应峰值只出现在低阶振型中心周围。
Along with the development of long-span structures, vibration acceleration has become an important evaluation for floor structure performance. Analyse the vibration response of long-span reinforced concrete open-web sandwich plate structures considering walking routes and walk frequency influence. Analysis shows that, the natural vibration of the long-span floor similar to solid panel, and low order modes is mainly vertical vibration. The long walking routes by ways of low-level modal center should be adopted. The peak acceleration of vibration response on walking routes are often bigger than fixed-point excitation, and the peak acceleration response On fixed-point excitation couldn＇t be used to appraise the vibration of long-span floor. The peak acceleration response of floor on different feeling point is different, large acceleration response peak appeared only in the low order modes center.
出处
《四川建筑科学研究》
2012年第1期9-13,共5页
Sichuan Building Science
基金
国家自然科学基金资助项目(50968004)
贵州大学研究生创新基金资助项目(校研理工2011055)
关键词
空腹夹层板
振型
舒适度
人行激励
open-web sandwich plate structures
modes
comfort level
walking excitation
