摘要
针对目前实际工程中没有较好的方法来评价化学植筋的疲劳性能,文中通过对3个植筋悬臂梁-柱试件以及1个现浇悬臂梁-柱试件的疲劳加载对比试验,研究在疲劳荷载作用下不同的植筋深度、不同的应力幅对植筋试件疲劳寿命、破坏模式,以及刚度的影响.研究表明,植筋试件的疲劳寿命低于现浇试件的疲劳寿命,同时植筋深度、钢筋应力幅对植筋试件的疲劳寿命有一定影响;疲劳加载后的植筋试件的极限承载力为设计强度的67%~78%,破坏时受拉区植筋未屈服,出现了复合型破坏形式.
Aiming at actual engineering without good test methods to evaluate the fatigue performance of chemical adhesive steel bar, this experiment designs a method to conduct the exploratory research on the fatigue performance of the cantilever beam-column. Through adding to fatigue loading on the three cantilever beam specimens and cast-in-place cantilever beam specimens, the experiment resear- ches on the influence on fatigue life, breakage form and stiffness of steel bar specimens from different steel bar depth and different stress amplitude in tension-shear fatigue loads, and has a comparative a- nalysis on the fatigue test results of cast-in-place cantilever beam specimens. Research indicated that fatigue life of steel bar specimen is below the fatigue life of cast-in-place specimen , and steel bar stress amplitude and steel bar depth have effects on the fatigue life of the steel bar specimens; The ul- timate bearing capacity of steel bar specimens through fatigue loading is sixty-seven percent to seven- ty-eight percent of the design strength. It is below the design strength, and the destroyed bar of the tension zone is not to yield, and the composite failure modes are appeared.
出处
《武汉理工大学学报（交通科学与工程版）》
2015年第4期711-715,共5页
Journal of Wuhan University of Technology（Transportation Science & Engineering）
基金
高等学校博士点学科专向基金项目(批准号:20090162120034)
国家自然科学基金项目(批准号:51308550)资助
关键词
化学植筋
悬臂梁-柱节点
疲劳荷载
拉-剪应力
破坏模式
chemical adhesive steel bar
cantilever beam-column joints
fatigue load
tension-shearstress
breakage form
