小跨高比RPC连梁抗震性能的正交数值模拟  

Orthogonal numerical simulation on seismic performance of RPC coupling beam with small span-to-depth ratio

作　　者：夏鑫 韩旭 XIA Xin;HAN Xu(School of Civil Engineer,Shandong Jianzhu University,Jinan 250101,China;Taidong Transportation Management Center,Shandong Hi-speed Co.,Ltd.,Tai'an 271000,Shandong,China)

机构地区：[1]山东建筑大学土木工程学院,济南250101 [2]山东高速股份有限公司泰东运管中心,山东泰安271000

出　　处：《计算机辅助工程》2022年第2期12-20,共9页Computer Aided Engineering

摘　　要：为研究跨高比、配箍量和配筋方式对小跨高比活性粉末混凝土(reactive powder concrete, RPC)连梁抗震性能的影响,设计三因素三水平正交试验,采用Abaqus软件对9个模型进行数值模拟,得到低周往复加载作用下不同参数构件的模拟滞回曲线和钢筋应力云图,分析连梁受力情况、刚度退化、承载能力、变形和耗能能力。结果表明:跨高比和配筋方式是影响RPC连梁抗震性能的关键因素,跨高比应控制在1.25以上构件才能产生延性破坏;在同等条件下,使用对角斜筋或菱形配筋方式,RPC连梁承载能力和延性得到显著提高。To study the effects of the span-to-depth ratio, the stirrup amount and the reinforcement form on the seismic performance of reactive powder concrete(RPC) coupling beams with small span-to-depth ratio, the three factors and three levels orthogonal test is designed, and the 9 models are simulated using Abaqus software. The simulated hysteresis curves and reinforcement stress contours of members with different parameters under low cycle reciprocating loading are obtained. The stress condition, the stiffness degradation, the bearing capacity, the deformation and the energy dissipation capacity of coupling beams are analyzed. The results show that the span-to-depth ratio and reinforcement form are the key factors affecting the seismic performance of RPC coupling beams, and the span-to-depth ratio should be controlled above 1.25 to produce ductile failure;under the same conditions, the bearing capacity and ductility of RPC coupling beams are significantly improved by using diagonal reinforcement or diamond reinforcement.

关 键 词：活性粉末混凝土 跨高比 连梁 配筋方式 正交试验 抗震性能 滞回曲线 

分 类 号：TP391.99[自动化与计算机技术—计算机应用技术] TU375.1[自动化与计算机技术—计算机科学与技术]