交會區鋼骨剪力強度對SRC柱接鋼梁之梁柱接頭耐震性能影響之研究

Abstract

摘 要 本研究進行一系列新型式實尺寸鋼骨鋼筋混凝土（Steel Reinforced Concrete，SRC）柱接鋼梁之梁柱接頭反復載重試驗，其目的在探討這種新型梁柱接頭之耐震性能與力學行為。此種新型梁柱建築構造主要的特點在於能夠有效的利用SRC柱的勁度與抗壓能力之優點，又可以利用鋼梁與鋼承板在施工上的方便性，避開SRC梁在施工上常見的缺陷。 依據指導教授翁正強博士所提出之研究構想與規劃，本研究探討之主要參數之一為SRC柱中交會區（Panel Zone）鋼柱腹板之剪力強度對梁柱接頭耐震能力之影響，本研究嘗試採取在梁柱接頭區加銲疊合板（Doubler Plate）但不配置圍束箍筋之方式，來簡化SRC柱接頭處箍筋的施工複雜性。 本研究實驗結果顯發現，對於交會區鋼柱腹板（含疊合板）之標稱剪力強度與該區最大需求剪力強度之比值（Shear Strength Ratio）在0.82以上之試體，在反復載重作用下，其鋼梁上最終均產生適當的塑性鉸，發揮良好的韌性消能作用。實驗結果亦發現，在梁柱接頭區之鋼柱腹板加銲適當的疊合板可以有效提升交會區之強度，亦可減少接頭區混凝土之開裂，並有助於鋼梁發揮塑性變形能力。本研究之結果初步證實，在適當設計下，此種SRC柱接鋼梁之構造可發揮良好的強度與韌性變形能力。

Abstract The objective of this research is to study the seismic behavior of steel beam to SRC（Steel Reinforced Concrete）column connections through a series of cyclic loading test of full-scale specimens. The purpose of using the SRC column is to take the advantages of its larger stiffness and stronger compressive strength. The major parameter investigated in this study is the influence of shear strength of steel panel zone within SRC column on the seismic behavior of the beam-column connection. A total of five full-scale specimens were tested in this study. The experimental results showed that the steel beam developed satisfactory plastic hinge when the steel panel zone shear strength is greater than 82％ of the required maximum shear capacity. The test results also suggested that the addition of a doubler plate on the steel web of the panel zone effectively reduced the shear cracks of the concrete at the beam-column joint.