簡支橋梁橡膠支承系統與止震塊耐震性能研究

Seismic Behavior of the Steel-Reinforced Neoprene Pad with Steel or Concrete Shear Keys in the Simply Supported Bridge

鄭錦銅(Chin-Tung Cheng) ； 陳鈺寧(Yu-Ling Chen)

《中國土木水利工程學刊》 20卷1期 (2008/03) Pp. 111-120

https://doi.org/10.6652/JoCICHE.200803_20(1).0009

摘要

九二一地震造成台3線上多座橋梁嚴重損壞。為了解地震力如何在支承與橋柱間傳遞與互制，有必要針對簡支橋梁橡膠支承墊與止震塊之耐震性能進行研究探討。傳統橋梁設計多為強支承－弱橋柱設計，以橋柱塑鉸來消散地震能量，然而新的功能設計則傾向強橋柱－弱支承設計，讓支承產生破壞以磨擦來消能。本文以試驗方法，分別探討設置於傳統簡支橋梁之橡膠支承墊（含剪力鋼棒）與止震塊之耐震性能。並提出理論模式模擬橋梁橡膠支承墊（含剪力鋼棒）與止震塊之剪力與變形關係，提供工程界參考。

關鍵字

簡支橋梁 ； 橡膠支承墊 ； 止震塊 ； 耐震性能 ； 大型結構試驗

並列摘要

Simply supported bridges in Taiwan were severely damaged in the latter after ChiChi Earthquake in 1999. In order to understand how the seismic force is transmitted from the bridge bearing to the piers, it is necessary to investigate the seismic behavior of the bridge bearing and concrete shear keys. The bridge in Taiwan is conventionally designed in a way of the strong-bearing-weak-column principle so that seismic energy is dissipated through the plastic hinges in the bridge piers. However, the strongcolumn-weak-bearing principle that dissipates energy through the friction in the bearing system has been proposed recently for the design of new bridges, in accordance with the concept of the performance based design. In this research, specimens of the steel-reinforced neoprene pad installed with steel or concrete shear keys commonly used in the simply supported bridges are constructed and tested. In addition to the tests, analytical models that can evaluate the shear strength as well as the force-deformation behavior for the bearing components with the shear keys are also proposed.

並列關鍵字

simply supported bridge ； steel-reinforced neoprene pad ； shear key ； seismic behavior ； full-scale testing