传统榫卯节点木框架抗震加固方法的试验研究

摘要

Three seismic strengthening methods including bamboo brace,energy-consuming steel brace and steel angle strengthening were studied to improve the seismic behavior of traditional Chinese timber frame with mortise-tenon connections.Four full-scale specimens including the control and strengthening timber frames with mortise-tenon connections were conducted with low cyclic reversed loading tests.Hysteresis loop, skeleton curve,stiffness degradation,energy consuming properties of the specimens and the moment -rotation relationship of the mortise-tenon joints were analyzed.Results show that the strengthening methods proposed in this paper can enhance the lateral load -resisting capacity and the energy-consuming capacity.Based on a reasonable design,the strengthening methods can be used to effectively strengthen traditional Chinese timber frame with mortise-tenon joints.%为增强传统木结构的抗震性能，研发了竹支撑加固、单向钢拉杆耗能支撑加固和角钢加固三种加固方法。通过包括对比木框架试件和加固木框架试件在内的4榀足尺榫卯节点木框架试件的低周反复试验，研究了加固前后榫卯节点木框架的滞回曲线、骨架曲线、刚度退化、耗能性能与榫卯节点的弯矩－转角关系。试验结果表明，三种加固方法均能不同程度提高榫卯节点木框架的侧向承载能力，并且具有良好的耗能能力。在合理设计基础上，提出的加固方法与施工工艺可为传统木结构的抗震加固提供有效的技术支撑。