开孔高强钢板材料力学性能的试验研究  

STUDY ON MECHANICAL PROPERTIES OF PERFORATED HIGH-STRENGTH STEEL PLATES

作　　者：张海龙[1] 赵雪航 李海锋[2,3] ZHANG Hailong;ZHAO Xuehang;LI Haifeng(CCCC First Highway Consultants Co.,Ltd.,Xi’an 710075,China;College of Civil Engineering,Huaqiao University,Xiamen 361021,China;Key Laboratory for Intelligent Infrastructure and Monitoring of Fujian Province(Huaqiao University),Xiamen 361021,China)

机构地区：[1]中交第一公路勘察设计研究院有限公司,西安710075 [2]华侨大学土木工程学院,福建厦门361021 [3]福建省智慧基础设施与监测重点实验室,福建厦门361021

出　　处：《工业建筑》2021年第1期157-162,199,共7页Industrial Construction

基　　金：国家自然科学基金项目(51778248);福建省自然科学基金面上项目(2018J01075);华侨大学中青年教师科研提升资助计划(ZQN-PY312);华侨大学研究生科研创新基金资助项目(18013086038)。

摘　　要：以高强钢Q460、Q600为研究对象,对14块开孔高强钢板进行单向拉伸试验,并详细分析试件的破坏特征、应力-应变曲线及其应变能。研究结果表明:未开孔试件断口处发生了明显的颈缩现象;开孔试件易在开孔处出现应力集中而成为最先破坏的部位;Q600高强钢材的极限抗拉强度、耗能性能、延性均优于Q460高强钢材;增大试件厚度,可以改善试件的极限抗拉强度、塑性变形能力以及耗能性能;而开孔则在一定程度上降低了试件的力学性能;布孔位置对于高强钢的耗能性能具有显著影响;当开孔沿着材性试件的受拉方向对称轴布置时,其耗能能力优于沿与垂直受拉方向布置的耗能能力。Taking Q460 and Q600 high-strength steel as research objects,the mechanical properties of 14 perforated high-strength steel specimens under uniaxial tension were tested.The damage characteristics,stress-strain hysteresis curves and corresponding energy dissipation of specimens were analyzed in detail.The results showed that the fracture of non-perforated specimens accompanied apparent necking;as stress concentration,the opening positions were the weakest parts destroyed for specimens.Q600 steel reflected the advantage of more higher strength,energy dissipation capability and ductility than that of Q460 steel.Increasing the thickness could improve the ultimate strength,plastic deformation capacity and energy dissipation capacity of the steels.The mechanical properties would be reduced to a certain extent because of perforation.The influence of the openings on energy dissipation capability was obvious.Comparing with the specinens with openings perpendicaular to the tensile direction,the specimens with openings along the tensile direction were of better capability of energy dissipation.

关 键 词：高强钢 开孔钢板 力学性能 材性试验 耗能 

分 类 号：TU511.35[建筑科学—建筑技术科学]