震損RC剪力牆之殘餘耐震能力與塑鉸設定探討

鋼筋混凝土（RC）剪力牆之高強度及高勁度雖可有效改善結構系統來提昇建築物之耐震能力，但其高勁度也易於地震中較梁柱構材先產生裂損，專業技師在評估受震損含RC剪力牆建物的殘餘耐震能力與安全性時，常面臨損壞判斷及震損構材模擬等技術上之問題，尤其對於那些僅為輕度到中度損壞之牆體，其可能不需補強但仍需評估其殘餘耐震能力的牆體。因為對受震損RC牆的殘餘耐震性能於國內外之研究相當稀少，常使得要使用國內側推分析之詳細評估法來評估震損建物殘餘性能時，於震損RC牆塑鉸設定上之強度、勁度與變形容量的折減方式無量化選擇依據。故本研究主要目的是通過文獻收集與回顧，彙整RC剪力牆之震損後力學行為，並與美國及日本現有之震後評估指針的參數與方式進行比較探討其合適性，並依營建署之損傷等級，對輕度至中重度震損RC牆於塑鉸設定上之強度、勁度與變形容量的折減方式提出建議，期能填補部分國內於震損RC牆殘餘耐震能力評估上所缺之資訊。

關鍵字

鋼筋混凝土；剪力牆；殘餘耐震能力；塑鉸

並列摘要

Due to the high lateral strength and stiffness of the RC shear wall, it can effectively improve the structural system and increase the seismic capacity of the building structure. However, the high stiffness property of RC walls will also easily induce cracking or damage as compared to the beam-column members in the earthquake. The technical problems for judgment of damage status and simulation of damaged components are often difficult to be determined, especially for those RC walls that are only at slightly or moderately damaged status, they may not need retrofitting but their residual seismic capacity should be evaluated. When using the nonlinear pushover analysis procedure to evaluate the residual seismic performance of damaged RC walls. Because researches on the residual seismic performance of damaged RC walls earthquakes are very limited. There is still no quantitative method for the selection of reduction factors on strength, stiffness, and deformation capacity of RC walls with various damaged statuses. Therefore, the main purpose of this paper is to collect and analyze the relative research works of literature on the post-earthquake behavior of RC shear walls. The suggested criteria, parameters, and procedures of the existing post-earthquake assessment guidelines in the U.S. and Japan are compared with those latest publications in the area of the residual capacity of RC walls for discussing their suitability. Finally, a reduction method based on Taiwan seismic evaluation procedure was proposed for modifying the nonlinear hinge properties of damaged RC walls with different damaged states.

並列關鍵字

Reinforced concrete ； shear wall ； residual seismic capacity ； plastic hinge

參考文獻

Maeda, M., and Kang, D. E., “Post-Earthquake Damage Evaluation of Reinforced Concrete Buildings,” Journal of Advanced Concrete Technology, V. 7, No. 3, pp. 327-335, 2009, doi: 10.3151/jact.7.327

Chiu, C. K.; Sung, H. F.; Chi, K. N.; and Hsiao, F. P., “Experimental Quantification on the Residual Seismic Capacity of Damaged RC Column Members,” International Journal of Concrete Structures and Materials, V. 13, No. 1, pp. 1-22, 2019, doi: 10.1186/s40069-019-0361-0

Marder, K. J.; Motter, C. J.; Elwood, K. J.; and Clifton, G. C., “Effects of Variation in Loading Protocol on the Strength and Deformation Capacity of Ductile Reinforced Concrete Beams,” Earthquake Engineering & Structural Dynamics, V. 47, No. 11, pp. 2195-2213, 2018, doi: 10.1002/eqe.3064

Marder, K. J.; Motter, C. J.; Elwood, K. J.; and Clifton, G. C., “Testing of 17 Identical Ductile Reinforced Concrete Beams with Various Loading Protocols and Boundary Conditions,” Earthquake Spectra, V. 34, No. 3, pp. 1025-1049,2018, doi: 10.1193/101717EQS215DP

Walsh, K.; Henry, R.; Simkin, G.; Brooke, N.; Davidson, B.; and Ingham, J., “Testing of Reinforced Concrete Frames Extracted from a Building Damaged during the Canterbury Earthquakes,” ACI Structural Journal, V. 113, No. 2, pp. 349-362, 2016, doi: 10.14359/51688198

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