純壓和純拉雙核心自復位斜撐反覆載重實驗研究

Abstract

近年來為改善鋼筋混凝土框構架之耐震性能，鋼斜撐補強廣泛應用在補強工法中，然而受限於鋼筋混凝土拉壓性能的差異，且鋼斜撐會發展顯著軸力，易使相鄰鋼筋混凝土構件承受複雜且不利之載種條件，則將逐步削減鋼斜撐原先設計性能。本研究透過改良Chou and Chung (2014)傳統交錨型雙核心自復位斜撐，研發新型純壓雙核心自復位斜撐，以及純拉雙核心自復位斜撐，使其擁有只受軸壓力或軸拉力的特性，並且保有雙核心自復位斜撐之零殘餘變形自復位能力以及斜撐的變形能力為傳統自復位斜撐的兩倍，能有效降低對拉力構件的線彈性變形量需求。本研究透過純壓和純拉雙核心自復位斜撐之力學行為，提出遲滯迴圈預測公式，並且利用有限元素分析(ABAQUS)加以驗證，並用純壓雙核心自復位斜撐進行試驗。

In recent years, in order to improve the seismic performance of reinforced concrete frame structures, steel diagonal brace reinforcement has been widely used in the reinforcement method. However, due to the difference in the tensile and compression properties of reinforced concrete, and the steel diagonal brace will develop significant axial force, it is easy to Concrete members subjected to complex and unfavorable loading conditions will gradually reduce the original design performance of steel braces. In this study, by improving the traditional called compression only dual-core self-centering brace (C-SCB) of Chou and Chung (2014), a new type of compression only dual-core self-centering brace (C-SCB) and a tension only dual-core self-centering brace (C-SCB) diagonal. The characteristics of the axial tension, and the zero residual deformation self-resetting ability of the compression only dual-core self-centering brace (C-SCB), and the deformation capacity of the diagonal brace is twice that of the traditional self-resetting diagonal brace, which can effectively reduce the demand for linear elastic deformation of the tension member. In this study, the hysteresis loop prediction formula is proposed through the mechanical behavior of compression only and tension only dual-core self-centering brace (C-SCB), which is verified by finite element analysis (ABAQUS), and tested with compression only dual-core self-centering brace (C-SCB)