砖混结构冷弯薄壁型钢轻混凝土加层结构动力特性分析  

Analysis of Dynamic Characters of Layered Masonry Structures with Cold-formed Thin-wall Steel Frame Infilled with Lightweight Concrete

作　　者：张志杰 陶小林 赵晓华 张宇霞 Zhang Yuxia;Tao Xiaolin;Zhang Zhijie;Di Haiyan(China Building Technique Group Co.,Ltd.,Beijing,100013;China Academy of Building Research,Beijing,100013)

机构地区：[1]中国建筑技术集团有限公司,北京100013 [2]中国建筑科学研究院有限公司,北京100013

出　　处：《建设科技》2021年第5期56-59,共4页Construction Science and Technology

基　　金：“国家重点研发计划资助”(项目编号:2017YFC0702900)。

摘　　要：冷弯薄壁型钢轻混凝土加层技术是一种新型既有砖混结构房屋改造形式,该技术不仅满足现阶段绿色装配需求,同时有效避免了加层结构质量与刚度突变的情况。本文采用ABAQUS有限元分析软件,建立了既有砖混结构、既有砖混结构钢结构加层、既有砖混结构冷弯薄壁型钢轻混凝土加层有限元模型,对加层前后结构的动力特性进行对比分析。根据分析可知,采用冷弯薄壁型钢结构加层后,自振周期有所增加,振型无明显位移突变情况,结构整体性能较好。The technique of story-adding with cold-formed thin-wall steel frame infilled with lightweight concrete is a new type of structural reorganization,which can not only meet the requirement of green and fabricated construction at present,but also avoid the mutation of the stiffness and mass of the layered structure effectively.The paper use the software of ABAQUS to establish the FE models for existing masonry structure,layered structure of story-adding with steel frame and layered structure of story-adding with cold-formed thin-wall steel frame infilled with lightweight concrete,and compare the dynamic characters of the models.The results show that,the natural vibration of layered structure with cold-formed thin-wall steel frame infilled with lightweight concrete is longer than the existing masonry structure,and there is no obvious displacement mutation in oscillation model,which shows the overall performance of the layered structure is reliable.

关 键 词：既有砖混结构 冷弯薄壁型钢 轻混土 加层 动力特性 

分 类 号：TU398.5[建筑科学—结构工程]