Abstract The integrity of moment-resisting timber framed structures can be compromised in a seismic event due to damage of the joint region. Externally bonded carbon fibre-reinforced polymer (CFRP) composites offers an effective retrofit strategy for such joints and the concept has been proven in a limited number of experimental studies to date. There is a, however, a distinct lack of numerical modelling studies of the system. This paper therefore reports the numerical modelling of the hysteresis behaviour of FRP-strengthened moment-resisting timber joints utilising the finite element method. Three types of joints are investigated, namely (1) plain unstrengthened joints, (2) FRP-strengthened joints that do not experience degradation in strength, and (3) FRP-strengthened joints with strength degradation. The joints are subjected to a displacement controlled cyclic load and the moment-rotation responses are extracted from the finite element results. In addition, the dissipated energy of each joint relative to the joint rotation is also provided. The modelling procedure is shown to be effective upon comparison with test results when the joint rotation is within an acceptable range of seismic activity.

中文翻译：

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FRP复合材料加固抗弯木接头滞后行为的建模

摘要 在地震事件中，由于接缝区域的损坏，抗弯木框架结构的完整性会受到损害。外部粘合的碳纤维增强聚合物 (CFRP) 复合材料为此类接头提供了一种有效的改造策略，迄今为止，这一概念已在数量有限的实验研究中得到证实。然而，明显缺乏对该系统的数值建模研究。因此，本文报告了使用有限元方法对 FRP 强化抗弯木节点的滞后行为进行的数值模拟。研究了三种类型的接头，即（1）普通未加强接头，（2）强度不下降的 FRP 加强接头，以及（3）强度下降的 FRP 加强接头。关节承受位移控制的循环载荷，从有限元结果中提取力矩-旋转响应。此外，还提供了每个关节相对于关节旋转的耗散能量。当接头旋转在可接受的地震活动范围内时，与测试结果进行比较，表明建模程序是有效的。