0206美濃地震橋梁震害探討及因應對策

DAMAGE INVESTIGATION AND RESPONSE STRATEGY OF BRIDGE DUE TO THE MEINONG EARTHQUAKE

葉芳耀(Fang-Yao Yeh) ； 李柏翰(Bo-Han Lee) ； 李政寬(Zheng-Kuan Lee) ； 許家銓(Chia-Chuan Hsu) ； 陳俊仲(Chun-Chung Chen) ； 李路生(Lu-Sheng Lee) ； 江奇融(Chi-Lon Jang) ； 宋裕祺(Yu-Chi Sung) ； 張國鎮(Kuo-Chun Chang) ； 劉光晏(Kuang-Yen Liu)

《中國土木水利工程學刊》 31卷5期 (2019/09) Pp. 431-441

https://doi.org/10.6652/JoCICHE.201909_31(5).0003

摘要

0206美濃地震造成台86線24號橋損壞，預力混凝土箱形梁之盤式支承位移，原本緊密的東西向橋面因而錯開，最大出現約60公分間距，長度達250公尺，危及橋梁安全。公路總局第五區養護工程處，立即以型鋼組立臨時支撐來強化結構安全，封閉東行線但保留西行線通行。並依序進行橋梁震損調查、橋梁地震特別檢測與安全評估、橋梁耐震評估及補強。並進行為期兩年之橋梁長期安全監測，以掌握補強後之橋梁安全狀況。本文整理之結論與建議，可提供未來橋梁受震害之處理程序與因應對策，並成為建立橋梁管理參數（警戒值、行動值）之重要參考。

關鍵字

橋梁地震特別檢測與安全評估 ； 橋梁耐震評估及補強 ； 橋梁長期安全監測

並列摘要

The Meinong Earthquake in Southern Taiwan on February 6, 2016, resulted in damage to Bridge No. 24 of Provincial Highway 86. The seismic damage was as follows: residual lateral displacement was about 60 cm of the beam, severe damage of the bearing, shear micro-cracks on the surface of the bridge pier, external micro-cracks on the box girders, and longitudinal micro-cracks on the internal roof plate of the box girder. The damage condition endangered the bridge safety. After emergency responses from the Fifth Maintenance Office of the Directorate General of Highways, repair and retrofit design by CECI Engineering Consultants, construction work by a general constructor, and evaluation and vehicle load tests by the National Center for Research on Earthquake Engineering (NCREE), the bridge was reopened to traffic on May 20, 2016. This study briefly describes the bridge seismic evaluation and retrofit process, as well as the post-earthquake investigations, vehicle load tests, and long-term monitoring by the NCREE.

並列關鍵字

damage investigation ； seismic evaluation and retrofit ； long-term monitoring of bridge