大跨度钢网架-玻璃组合楼板动力特性研究

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振动与冲击 ›› 2018, Vol. 37 ›› Issue (13) : 195-202.

论文

大跨度钢网架-玻璃组合楼板动力特性研究

汪志昊1，皇幼坤1，李晓克1，徐珂2，陈银1

作者信息 +

Dynamic characteristics of a large-span steel space frame-glass composite floor

WANG Zhihao1，HUANG Youkun1，LI Xiaoke1，XU Ke2，Chen Yin1

Author information +

文章历史 +

摘要

对某大跨度钢网架-玻璃组合楼板进行环境振动测试识别得到楼板的竖向振动动力特性，并与有限元模型仿真结果进行对比分析，旨在提出面向振动舒适度评估的该类楼板有限元精细化建模方法。研究表明：遗址保护参观建筑用大跨度钢网架-玻璃组合楼板特有的开洞、悬臂、悬挂结构形式，使得遗址洞口参观区域成为最不利振动位置，且上下层楼板存在典型的耦合振动。面向动力特性分析与振动舒适度评估的大跨度钢网架-玻璃组合楼板精细化有限元模型（弱振状态），有必要区别于承载力极限模型（强振状态）的活荷载取值，模拟结构层楼板及装饰面层对楼板体系的实际刚度贡献，模态阻尼比可取2.78%~2.98%，同时适当考虑人-板相互作用对楼板动力特性与响应的影响。

Abstract

Ambient vibration tests for a large-span steel space frame-glass composite floor were conducted. The identified vertical dynamic characteristics of the floor were compared with its finite element (FE) model simulation results. Here, a sophisticated FE floor modeling method was proposed for vibration comfort evaluation. The study showed that a historic site protection visit building adopts large-span steel space frame-glass composite floor’s special open hole, cantilever and suspension etc. structure forms to make the site entrance visit area become the most unfavorable vibration position, there exist typical coupled vibrations among various floors; it is necessary to distinguish the large-span steel space frame-glass composite floor’s sophisticated FE model (in weak vibration state) from the load-bearing ultimate model (in strong vibration state)’s live load value; the actual stiffness contributions of structural layer floor and architectural surface to the whole floor system are simulated, and the modal damping ratio can be 2.78% ~ 2.98%; the effects of human-floor interaction on the whole floor system’s dynamic characteristics and response should be considered appropriately.

导出引用

汪志昊1，皇幼坤1，李晓克1，徐珂2，陈银1. 大跨度钢网架-玻璃组合楼板动力特性研究[J]. 振动与冲击, 2018, 37(13): 195-202

WANG Zhihao1，HUANG Youkun1，LI Xiaoke1，XU Ke2，Chen Yin1. Dynamic characteristics of a large-span steel space frame-glass composite floor[J]. Journal of Vibration and Shock, 2018, 37(13): 195-202

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