施工細節對RC柱耐震補強影響的實驗研究

擴柱與增設翼牆補強是校舍補強中常見的補強工法，擴柱補強可同時提高抗彎和抗剪的能力而增設翼牆補強則主要著重在提升抗剪的能力，此兩種補強工法的有效性已有相當多的實驗驗證。一般相信新舊構材間的連結方式將直接影響到補強後試體的耐震行為，因此在實務上出現不同的施工細節。本研究特別選用現行校舍中，常見的鋼筋混凝土柱尺寸做為本研究的原柱試體，並以此試體做為比較的基礎。另外，也製作四支同樣的鋼筋混凝土柱試體做為補強研究之用，其中兩支將進行擴柱補強，而其他兩支則將進行增設翼牆補強。擴柱補強之施工細節的主要差異在於新舊構材間有無配置剪力釘或摩擦筋，而增設翼牆補強之施工細節的主要差異在於新舊構材間是直接採用雙排植筋或是單排植筋外加離原柱最遠最外側植筋改採有效固定於既有的鋼筋上，其有效固定可以採用135度標準彎鉤或是直接利用焊接來達成。希望能藉此研究探討不同施工細節的優劣性以及補強工法的有效性。

關鍵字

擴柱補強；增設翼牆補強；耐震補強；鋼筋混凝土；反覆載重試驗

並列摘要

An original reinforced concrete column and its four strengthened specimens, where two are RC jacketing columns and the other two are columns with installing wing walls, were tested in this study. The original column was designed to comply with the old design standards and thus the usual detailing deficiencies in existing school buildings can be simulated. Two different structural details were chosen to fabricate the full-scale specimens for both seismic retrofitting techniques. The major difference in structural details for RC jacketing columns is whether or not the transverse adhesive anchors are used to provide a smooth transfer of actions between existing column and new jacket. Whereas, the major difference in structural details for columns with wing walls is the arrangement of transverse and longitudinal adhesive anchors in one row or two rows between new and existing concrete. The seismic performance of the five test specimens are compared and discussed, and the structural details for RC jacketing columns and columns with installing wing walls are recommended for practice.

並列關鍵字

RC jacketing ； Wing wall ； Seisimic Retrofitting ； cyclic loading tests

參考文獻

[24]國家地震工程研究中心，「建築物耐震性能設計指針」，台北，2006

[8]ATC-40, “Seismic evaluation and retrofit of concrete buildings”, Report No. SSC 96-01, Applied Technology Council, 1996

[9]FEMA 273, NEHRP Guidelines for the seismic rehabilitation of buildings, Federal Emergency Management Agency, Washington, D.C., 1997

[11]Elwood, K. J., and Moehle, J. P., “Axial capacity model for shear damaged columns”, ACI Structural Journal, Vol. 102, No. 4, 578-587, 2005

[12]Elwood, K. J., and Moehle, J. P., “Drift capacity of reinforced concrete columns with light transverse reinforcement”, Earthquake Spectra, Vol. 21, No. 1, 71-89, 2005

國際替代計量

施工細節對RC柱耐震補強影響的實驗研究

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