摘要
为了更好地发挥高强度钢材的承载性能,保证高强度钢材连接节点的性能和质量至关重要,本文对螺栓预拉力、连接板表面状态、钢材等级及连接板厚度等因素进行了参数分析,并与GB50017、ANSI、EC 3规范理论计算值进行了对比,讨论了不同规范的适用性。结果表明:螺栓预拉力对连接抗剪强度和变形没有影响;抗滑移系数从0.35增加到0.50,连接的变形值减小15.5%,承载力几乎没有提高;钢材屈服强度从345 MPa增加到690 MPa,承载力提高了1.58倍,而变形能力明显降低,延性变差;增加钢板厚度能显著提高连接承载能力,连接的破坏模式由钢板横向撕裂破坏发展为栓杆剪切破坏。
The performance and quality of high strength steel connection node are essential for the better application of the bearing capacity of high strength steel.In order to make a discussion of the application of different standards,the parameter analysis is made to bolt pretension force,the surface state of connecting plate,steel grade and thickness of connecting plate,compared with theoretical calculating value of standard GB500017,ANSI,EC3.The result shows that the bolt pretension force has no effect on shear strength and deformation;if the anti-slip factor increases from 0.35 to 0.50,the deformation value will decrease by 15.5%,and the bearing capacity almost has no improvement.If the steel yield strength increases from 345 MPa to 690 MPa,the bearing capacity increases by 1.58 times,but the deformation capacity obviously decreases and the ductility weakens;the connection bearing capacity can be obviously improved by the increase of steel thickness,with the failure in connection caused by crosswise tear of steel plate caused by bolt shear.
出处
《西安理工大学学报》
北大核心
2017年第2期180-186,共7页
Journal of Xi'an University of Technology
基金
国家自然科学基金资助项目(51308454)
中国博士后科学基金资助项目(2013M542371)
陕西省博士后自然科学基金资助项目
陕西省住建厅建设科技专项资助项目(2014-K12)
西安理工大学科技新星资助项目
关键词
高强度钢材
螺栓预拉力
摩擦系数
抗剪性能
折减系数
high strength steel
bolt pretension force
frictions factor
resisting shear capacity
reduction factor
