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。
The effects of the stress ratio in the cyclic loading and the environment medium were studied.
同时研究了循环加载中的应力比以及环境介质对于疲劳裂纹扩展的影响。
The performance of FRP materials under cyclic loading has always been the weak point of associate study.
FRP材料的疲劳性能一直是对该材料研究的薄弱点。
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。
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。
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。
The test of 6 hybrid precast unbonded post-tensioned concrete beams under reversed cyclic loading is carried out.
本文采用碳纤维布和外包钢两种加固方法，对6个混合装配无粘结预应力梁进行了低周反复加载试验。
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。
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。
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。
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。
Experimental methods constitute a reliable means of evaluating the capability of a structural component to withstand cyclic loading.
实验方法是一个能评价构件承受循环载荷能力的可靠方法。
Experimental methods constitute a reliable means of evaluating the capability of a structural component to withstand cyclic loading.
各种实验方法构成评价构件承受循环载荷能力的可靠手段。
On this basis, triaxial cyclic loading and unloading tests of argillite with obviously bedded structures are designed and completed.
在此基础上，设计并完成具有明显层理状结构的泥质板岩的三轴循环加卸载试验。
The fatigue behavior of cement-sodium-silicate-grouted soil is investigated by cyclic loading test of dynamic asymmetric sine wave load.
采用载荷控制、非对称正弦波动态载荷变化方式对水泥土进行疲劳载荷试验。
Also, as the cyclic loading effects of the train to the subgrade, the improved subgrade needs to possess quality dynamic characteristics.
由于列车对路基的循环荷载作用，因此改良后的路基还要有优良的动力学特性。
At the same time, with some rock samples from Shandong province, sound wave experiments and uniaxial cyclic loading tests are carried out.
同时采用声波实验和单轴循环加载实验相结合的方法，以山东某矿勘探区岩体为试验对象，对取自该矿区的岩样进行了实验。
Strength and deformation were studied on plastic concrete in different loading ways through direct and cyclic loading and unloading testing.
通过塑性混凝土在单调和循环加卸载下的试验，对不同加卸载作用下塑性混凝土的强度和变形性能进行研究。
After the joint roughness is defined as the equivalent inclination Angle, the model can simulate the behaviors of joints under cyclic loading.
通过将界面粗糙度定义为等效起伏角，模型能模拟节理循环剪切性状。
The changing tendency of the physical index of soil mass shows obvious difference with the change of depth due to the action of cyclic loading.
循环荷载作用使土体的物性指标变化趋势因深度的不同而具明显的差异性。
As a result, the stress-relaxation of yarn is obviously observed, and the cyclic loading has much more influence on the tensile property of yarn.
试验结果表明，玻璃纤维长丝纱有较明显的应力松驰现象，反复循环负荷作用对玻璃纤维长丝纱的强伸性能有较大的影响。
The models of moment-rotation relationship of flush end-plate composite connections were put forward for the monotonic loading and cyclic loading.
目的研究半刚性连接弯矩-转角关系，为半刚性组合框架设计提供依据。
The research results show martensite transformation stress decreases with an increase in cycle due to the residual strain during full cyclic loading.
研究表明在完全循环加载过程中，由于残余应变的存在，马氏体相变应力随循环增加而减小。
The calculation results were compared with those obtained by relevant cyclic loading test results, and the validity of this proposed model was verified.
最后将该方法的计算结果与相关循环荷载试验结果进行了对比，结果证明了该模型的有效性。
This article quantitatively analyses the dynamic response of seafloor soil under the cyclic loading of waves and discusses the instable mechanism of soil.
本文还定量分析了海底土体对波浪周期性荷载的动力响应，并对其不稳定性机制进行了探讨。
The transient effective shear-strength theory characterizing the strength change behavior of saturated sand under cyclic loading is presented in this paper.
本文给出了一个适用于表征饱和砂土在往返荷载下强度变化特性的瞬态有效抗剪强度理论。
Besides, by adopting the method of mobile mapping origin, the mapping rule is modified to simulate the elastoplastic property of soils under cyclic loading.
同时，在映射准则的定义中采用映射中心可移动的方法，以反映土体在卸载再加载时的弹塑性。
The (aeolotropism) and Bauschinger effect resulted from plastic deformation under cyclic loading were reflected by the kinematic hardening model in the SFEM.
针对复杂的交变载荷，采用运动强化模型反映塑性应变引起的各向异性和包辛格效应。
This paper presents the drained test of saturated tailing sand in dynamic simple shear apparatus by measuring volume change of the sample under cyclic loading.
本文通过对饱和尾矿砂在振动单剪仪上的排水试验，量测了试样在周期荷载下的体积变化。
This paper presents the drained test of saturated tailing sand in dynamic simple shear apparatus by measuring volume change of the sample under cyclic loading.
本文通过对饱和尾矿砂在振动单剪仪上的排水试验，量测了试样在周期荷载下的体积变化。
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