塔式起重机结构件安全寿命评估  

Safety life evaluation of structure member for tower crane

作　　者：徐永春[1] 王者静[2] 林云[1] 

机构地区：[1]宁波大学建筑工程与环境学院,浙江宁波315211 [2]青岛建筑工程学院,山东青岛266033

出　　处：《建筑机械》2003年第11期54-56,共3页Construction Machinery

摘　　要：根据断裂力学分析方法 ,确立塔机结构件焊接节点在循环荷载作用下缺陷及裂纹的扩展速率 ,分析计算缺陷对结构件节点疲劳强度和疲劳寿命的影响 ,确定某塔机结构件断裂事故的发生原因。The defect or crack developing rate of structure member welding point for tower crane under cycling load is determined with fracture mechanics analysis method The influence of defect on fatigue strength and fatigue life of structure member joint is also analyzed Then the cause of the crack accident of structure member could be determined

关 键 词：塔式起重机 结构件 断裂力学 循环荷载 疲劳强度 疲劳寿命 断裂事故 

分 类 号：TH213.3[机械工程—机械制造及自动化]