Title:
Vibration Performance of Inter-Module Composite Floors for Modular Buildings
Author(s):
Youjin Chae, Min-Jun Jeon, Chang-Kil Ju, Seung-Il Kim, and Tae-Sung Eom
Publication:
Symposium Paper
Volume:
364
Issue:
Appears on pages(s):
20-39
Keywords:
modular construction, floor vibration, composite structure, precast concrete, serviceability
DOI:
10.14359/51745454
Date:
12/1/2024
Abstract:
Modular construction has been attracting attention worldwide as a promising solution to reduce construction time and labor demand. In this study, a new inter-module composite floor system that connects the upper module floor beams and lower module ceiling beams was experimentally and analytically investigated with an emphasis on vibration performance under service loading. First, the upper module floor of 2 m [6.56 ft] wide and 6 m [19.7 ft] long was fabricated as a composite system consisting of precast concrete (PC) panels, steel beams and ultra high-performance concrete (UHPC) connectors. Structural integrity between PC panels, steel beams and UHPC connectors were secured using grouting and topping mortar. Then, the lower module ceiling beams were connected to the upper module floor beams by fully tensioned high-tension bolts (i.e., slip-critical connection) to complete the inter-module composite floor. The vibration frequencies, damping ratio, and acceleration responses of the inter-module composite floors were measured from laboratory tests such as impact hammer, heel drop and walking tests, considering the number and location of the connecting bolts as the test parameter. The vibration characteristics of the inter-module composite floors were investigated further through finite element analysis. The measured and predicted vibration performances were compared with the acceptance criteria in AISC Design Guide 11 and ISO 10137.