| Title |
Camber Reconstruction for a Prefab PSC Girder Using Collocated Strain Measurements |
| Authors |
김현영(Kim, Hyun Young) ; 고도현(Ko, Do Hyeon) ; 박현우(Park, Hyun Woo) |
| DOI |
https://doi.org/10.12652/Ksce.2022.42.2.0151 |
| Keywords |
프리팹 PSC 거더; 캠버 재구성; 병치된 변형률 계측치; 시간이력거동; 스마트 센싱; 스마트 건설 Prefab PSC girder; Camber reconstruction; Collocated strain measurements; Time-dependent behavior; Smart sensing; Smart construction |
| Abstract |
Prefab members have attracted attention because they can be mass-produced in factories through smart construction technology. For prefab prestressed concrete girders, it is important to manage the shapes of the girders properly from production to the pre-installation stage for consistency with the prefab floor plate during the erection process. This paper presents a camber reconstruction method using collocated strain measurements from the top and bottom of the prefab girder. In particular, the camber reconstruction method is applied to measured strain data in which the time-dependent behavior of concrete is considered after the introduction of prestress. Through
Monte Carlo numerical simulations, the statistical accuracy of the reconstructed camber for a limited number of sensors, measurement errors, and nonlinear time-dependent behaviors are analyzed and validated. |