Lessons Learned from the Damaged Chi-Lu Cable-Stayed Bridge
Lessons Learned from the Damaged Chi-Lu Cable-Stayed Bridge
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DOI：
10.1061/(asce)1084-0702(2004)9:4(343
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发表时间：
2004-07
影响因子：
3.6
通讯作者：
Kuei-Chung Chang;Y. Mo;C. C. Chen-C.;L. C. Lai;C. Chou
中科院分区：
文献类型：
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作者：
Kuei-Chung Chang;Y. Mo;C. C. Chen-C.;L. C. Lai;C. Chou
1999年9月21日凌晨1时47分（台湾当地时间），台湾中部发生特大地震。中央气象局（CWB）地震中心确定此次地震震级为ML 7.3（CWB）和MW 7.7（哈佛CMT）。地震造成重大人员伤亡，桥梁和建筑物结构受损。在受损地区，唯一的斜拉桥 Chi-Lu 在地震发生时正处于竣工的最后阶段。这座桥跨过浊水河，将集集与泸沽小镇连接起来。高架桥从河两岸延伸到斜拉桥的两端。这座桥由林同棪国际设计，由一个单塔支撑，通过两排电缆连接到道路中心。本文报道了赤庐大桥遭受的损坏情况。大桥南侧桥面受损严重。塔架发生了额外的损坏。在道路下方，塔架仅显示出轻微裂缝。然而，在道路上方，盖子严重剥落，并且裂缝向上延伸，几乎到达最低电缆的高度。通过计算机建模评估了桥梁的抗震性能。将计算结果预测的损坏与桥梁遭受的损坏进行比较。描述了从这项研究中吸取的教训。
A disastrous earthquake struck central Taiwan at 01:47 a.m. September 21, 1999 (Taiwan local time). The Seismology Center of the Central Weather Bureau (CWB) determined the magnitude of this earthquake to be ML 7.3 (CWB) and MW 7.7 (Harvard CMT). The earthquake caused heavy casualties and structural damage to bridges and buildings. In the damaged areas, the only cable-stayed bridge, the Chi-Lu, was in the final stages of completion at the time of the earthquake. This bridge connected Chi-Chi to the small town of Lu-Ku across the Juoshuei River. Viaducts ran from both banks of the river to the ends of the cable-stayed bridge. The bridge, designed by T. Y. Lin International, was supported on a single pylon, which was connected to the center of the roadway by two rows of cables. In this paper, the damage suffered by the Chi-Lu bridge is reported. Severe damage occurred in the deck on the southern side of the bridge. Additional damage occurred in the pylon. Below the roadway, the pylon showed evidence of only minor cracking. However, above the roadway there was severe spalling of the cover and a crack extended upward nearly to the level of the lowest cables. The seismic performance of the bridge was evaluated by computer modeling. The damage predicted by the computational results was compared to that sustained by the bridge. The lessons learned from this study are described.