整合資料視覺化與BIM技術於結構振動監測之應用

Abstract

結構振動監測用於判斷結構物狀態、保障生命安全有其重要性，然而非土木專業領域人員不易判讀工程軟體運算輸出之數值結果，容易產生資訊流通障礙，如今運用建築資訊模型（Building Information Modeling, BIM）於土木工程實務及管理已是趨勢，為促進傳統工程資訊交流與跨領域之應用，本研究將建立一具備視覺化BIM模型與結構健康監測結果之網站。本研究使用xBIM Toolkit軟體之功能模組結合HTML5網頁前端技術，將標準IFC檔案壓縮後於網頁上進行3D模型渲染，網站基礎介面由HTML5、CSS及JavaScript建構，資料交換藉由API與後端網頁伺服器溝通，網頁主要特色為3D動態視圖和互動式圖表，使用者能透過滑鼠直接操作3D建築模型並取得結構振動分析資訊；另外，考量行動載體和跨平台應用，本網站採Bootstrap響應式網頁設計框架，能依據用戶螢幕動態調整頁面排版。最後，為驗證本研究之效益，將以國立交通大學工程二館及國震中心之八層鋼構架為對象進行結構振動監測，該監測系統之架構是由感應子接收振動訊號，經過快速傅立葉轉換、頻率響應函數等頻譜分析後，將原始數據與分析結果儲存至數據庫，讓用戶透過網頁介面撈取資料庫之數據進行視覺化顯示。

Structural vibration monitoring is used to determine the state of buildings and to ensure the safety of life. While it is difficult to interpret those professional software output without civil engineering background and causes an information barrier. Now, it is the trend to use BIM technology in civil engineering and construction managements. The aim of this paper is to build up an interactive website implementing BIM and structural vibration analysis that promotes information exchange and cross-field applications in traditional engineering. It uses xBIM Toolkit which is an open source software to compress standard IFC file and visualize 3D model on website. The user interface is developed with HTML5, CSS and JavaScript. The API is responsible for data exchange and communications between front-end and server. 3D Model rendering and interactive charts are the key value on the page. It allows user to directly control 3D objects by mouse also gets real-time analysis from structural vibration monitoring system. For the popularity of mobile devices and cross-platform utilities, each page is built on the RWD framework. It revises layout depending on user device. The feasibility of system is validated by clinical trials at NCTU Engineering Building II and NCREE. It gets vibration signals from sensors and perform FFT, FRF approach then save the result. User can access database and visualize data via website.