中广核大厦钢结构关键节点施工阶段受力分析及应变监测  

Stress analysis and strain monitoring of steel structure critical joints of China Guangdong Nuclear Power Group Building during construction stage

作　　者：韩杰 赵超 黄浩[2] 

机构地区：[1]广东大亚湾核电服务集团有限公司,深圳518000 [2]重庆大学土木工程学院,重庆400045

出　　处：《建筑结构》2014年第9期39-42,共4页Building Structure

基　　金：教育部博士学科点专项科研基金(20110191120034);中央高校基本科研业务费项目(CDJZR12200023)

摘　　要：中广核大厦北楼采用大悬臂转换钢桁架结构体系,其中钢骨混凝土主体结构与悬挑钢结构之间的连接节点区域具有受力大、力学状态复杂、在施工过程中经历荷载突变等特点,可知该节点区域的受力性能是保证结构安全的重要环节。基于SAP2000有限元平台建立节点区域三维有限元模型,对其在施工过程中各控制工况下的应力状况及局部稳定性进行了分析,并在施工过程中对该节点及焊缝区域的应变变化规律进行了现场监测,监测结果与有限元分析结果吻合较好,验证了该节点的传力可靠性及安全性。China Guangdong Nuclear Power Group Building adopts the structural system of large cantilever transfer steel truss structure. The connection area between the main structure of steel reinforced concrete and cantilever steel structure features large stress and complex mechanical state, and it experiences sudden change of the stress in the cons/ruction stage. So the mechanical properties of the connection area are important parts of the structure to ensure safety. SAP2000 was used to buibl a three-dimensional finite element model of the eonnection area. Stress conditions and local stability under the contrulled stress conditions in the construction stage were analyzed. On-site monitoring of the strain variation law of the joint and the weht area in the construction stage was carried out. Monitoring results and finite element analysis results are in good agreement, which verifies the reliability and safety of stress transmission of the joint.

关 键 词：节点 钢结构 监测 有限元分析 

分 类 号：TU393.3[建筑科学—结构工程]