带裂缝的木梁框架结构动力特性研究  

STUDY ON DYNAMIC CHARACTERISTICS OF WOODEN BEAM FRAME STRUCTURE WITH CRACKS

作　　者：杨莹莹 赵腾飞[1] YANG Yingying;ZHAO Tengfei(College of Civil Engineering and Architecture,Liaocheng University,Shandong Liaocheng 252000,China)

机构地区：[1]聊城大学建筑工程学院,山东聊城252000

出　　处：《低温建筑技术》2023年第7期86-89,共4页Low Temperature Architecture Technology

基　　金：山东省自然科学基金面上项目(ZR2020ME240)。

摘　　要：为研究开裂木梁对整体结构动力特性影响,文中建立了四梁(均为完好木梁)四柱的一榀木结构框架,在验证文中建模方式可靠性的基础上,建立带有不同裂缝深度的木梁框架有限元模型,并与带有完好木梁框架进行模态与位移、加速度地震响应对比。结果表明随木梁裂缝深度的增加,结构自振频率逐渐变小,自振周期延长。带有完好木梁与开裂木梁的框架在受地震激励时,结构位移响应都表现出自柱中到梁端逐渐变大的规律,加速度响应均呈现出自柱中到梁端逐渐变小。带有开裂木梁框架的位移与加速度响应均大于带有完好木梁框架的位移与加速度响应。随木梁裂缝深度增加,结构的位移与加速度响应均逐渐变大。通过研究,以期引起学者对开裂木梁动力特性的关注,并对开裂木梁进行加固相关研究提供参考。To study the impact of cracked wooden beams on the dynamic characteristics of the overall structure,a wooden structure frame with four beams and four columns is established,in which a wooden beam frame with differ⁃ent crack depths is compared with a frame with intact wooden beams on modal,displacement,and acceleration seis⁃mic responses.The results show that with the increase of crack depth,the natural vibration frequency of the struc⁃ture decreases and the natural vibration period prolongs.When the frame with intact and cracked wood beams is sub⁃jected to earthquake excitation,the displacement response of the structure is gradually larger from the column to the beam end,and the acceleration response is gradually smaller from the column to the beam end.The displacement and acceleration responses of frame with cracked wood beam are larger than those of frame with intact wood beam.With the increase of crack depth,the displacement and acceleration responses of the structure increase gradually.

关 键 词：古建木构 开裂木梁 模态 地震响应分析 

分 类 号：TU366.2[建筑科学—结构工程]