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以RPC箱型桥墩为研究对象,拟定合理结构形式和尺寸,设计了3个RPC箱型墩试件。通过对试件施加常轴力以及水平反复荷载,研究了水平荷载加载方向角对RPC箱型墩抗震性能的影响,分析了各试件的韧性、滞回曲线、骨架曲线、荷载退化曲线和刚度退化曲线等方面的特征,并得出了各试件的位移延性系数和耗能系数。作者编制并验证了单向荷载作用下的全过程非线性数值分析程序。实验与数值结果表明:RPC箱型墩具有较好的抗震性能,水平荷载加载方向角是影响箱型墩抗震性能的一个重要因素;斜向受力构件的抗震性能要弱于主轴受力构件。
Taking the RPC box-type piers as the research object, a reasonable structure form and size were devised, and three RPC box piers were designed. The influence of horizontal loading direction angle on the seismic performance of RPC box piers was studied by applying constant axial force and horizontal repeated load to the specimens. The toughness, hysteresis curve, skeleton curve, load degeneration curve and stiffness Degradation curves and other aspects of the characteristics of the specimen and obtained the displacement ductility coefficient and energy dissipation coefficient. The author compiles and verifies the whole process nonlinear numerical analysis program under the unidirectional load. The experimental results and numerical results show that the RPC box pier has good seismic performance and the horizontal load loading direction angle is an important factor affecting the seismic performance of the box pier. The seismic performance of the inclined component is weaker than that of the main component.