Use of Fiber Reinforced Concrete to Improve Seismic Behavior of Coupling Beams

抗震墙和抗弯矩框架组成的双体系通常用于地震带的中高层建筑。门窗的开口通常用于R/C墙壁，将它们分成两个或更多个墙壁，由深和短的元件耦合，称为耦合梁。为了避免这些梁的严重刚度和强度退化，使用了对角加固细节。然而，这样的细节很难构建，并导致耦合梁中显著的杆塞。本文旨在对地震荷载作用下纤维增强耦合梁的性能进行实验和分析研究。预计纤维增强混凝土的使用将导致在耦合梁中消除对角钢筋的需要，同时提高其抗震性能。将建立分析模型来模拟地震荷载作用下纤维增强耦合梁的响应。

Dual systems consisting of R/C walls and moment resisting frames are commonly used for moderate and high rise buildings in seismic zones. Openings for doors and windows are typically used in R/C walls, splitting them into two or more walls coupled by deep and short elements, known as coupling beams. To avoid severe stiffness and strength degradation in these beams, a diagonal reinforcement detail is used. However, such a detail is difficult to construct and leads to significant bar congestion in coupling beams. The proposed research is aimed at investigating experimentally and analytically the behavior of fiber reinforced coupling beams under earthquake loading. It is expected that the use of fiber reinforced concrete will lead to the elimination of the need for diagonal reinforcement in coupling beams, while improving their seismic performance. Analytical models will be developed to simulate the response of fiber reinforced coupling beams under earthquake loading.