1·Specimens of 16 unbonded prestressed concrete beams under low cyclic loading were tested.
完成了16根无粘结预应力混凝土梁的低周反复荷载试验。
2·Main Outcome Measures: Torsion, bending, and axial stiffness and axial failure force after cyclic loading.
主要测量指标：扭转、弯曲和轴向刚度，以及循环载荷下轴向失效力。
3·The iterative formulas of elastoplastic stochastic finite element method under cyclic loading were deduced.
推导了交变载荷下弹塑性随机有限元法迭代格式。
4·Graphite plays a role as pores in the interface and increases the stress concentration under cyclic loading.
在滚动接触疲劳试验时循环载荷的作用下，界面处的石墨相当于孔洞引起应力集中。
5·The authors also successfully predict the relaxation of the residual stress under successive cyclic loading.
计算预言了脉动循环载荷下自增强残余应力的松弛现象。
6·The cyclic loading not only affect the inner part of the material but also the surface state of the corroding surface.
交变载荷不但影响了材料的内部，同时也影响了腐蚀表面的表面状态。
7·The fatigue behavior of concrete under axial tension with constant and variable amplitude cyclic loading is investigated.
基于室内试验，研究了混凝土在等幅和变幅重复荷载作用下的轴拉疲劳性能。
8·The crack fractographs of X60 pipeline steel after 10% per-tension deformation under cyclic loading are investigated by the SEM.
用扫描电镜（SEM）分析了X60管线钢在未变形和10%的预拉伸变形后循环载荷下的裂纹断口形貌。
9·The crack propagation characteristics of X70 pipeline steel in the synthetic soil solution under cyclic loading are investigated.
试验研究了X70管线钢在模拟土壤介质中，循环载荷下的裂纹扩展特性和宏观规律。
10·Mechanical characteristics of rock joints and interfaces under cyclic loading are important to stability safety of upper structure.
岩体结构面在循环加载条件下的力学特性直接关系到上部结构的稳定安全。