Research on Monotonic and Fatigue Properties of Functionally Graded Composite Beams Crack-Controlled by UHTCC in Bending
首发时间:2012-06-27
Abstract:This research focuses on mechanical performances of UHTCC-FGC beams under monotonic and fatigue loading. A total of 3 UHTCC-FGC beams including 2 monotonic beams and one fatigue beam are tested, and the stress level of fatigue beam is set as 0.85. The constant ratio of minimum stress to maximum stress is set to 0.2 to avoid any impact and slip between the loading machine and the specimens during testing. The specimen is subjected to sinusoidal cyclic loading at 1 frequency. During the experiments, the fatigue life, deformability and loading capacity of UHTCC-FGC beams are measured and recorded. Meanwhile,the development of cracks and the failure pattern of UHTCC-FGC beams during the test are observed at the same time.
keywords: structural engineering UHTCC-FGC monotonic fatigue crack control deformation compatibility
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超高韧性水泥基复合材料功能梯度梁的弯曲静载和疲劳试验研究
摘要:本文主要研究了超高韧性水泥基复合材料功能梯度梁的静载与疲劳性能。总共进行了3根功能梯度梁的试验,其中两根为静载梁,一根为疲劳梁。疲劳试验的应力水平为0.85。为防止机器和试件的碰撞和滑移,应力比设为0.2。疲劳荷载波谱采用正弦波的形式,频率为1Hz。本文对超高韧性水泥基复合材料功能梯度梁的疲劳寿命、变形以及荷载承载性进行了测量,同时观察了超高韧性水泥基复合材料功能梯度梁裂缝的开展状况与失效时的形态。
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