设计开发了一种可置于环境箱中模拟环境与疲劳荷载耦合作用的混凝土材料弯曲疲劳试验机,它由加载主体、减速机、外框架和显屏控制件组成,减速机固定在加载主体上并一起被置于外框架内部,通过减速机带动加载主体的转子旋转产生的离心力竖向分力作为疲劳荷载,并由外框架抵抗离心力水平分力,由显屏控制件控制试验机对混凝土试件的加载次数,且减速机有变速功能,可实现加载频率在0.63~2.03 Hz变化。试验机高1.62 m,重约260 kg,施加近似正弦波形的疲劳荷载,荷载幅值最高可达约930 N,可应用于素混凝土梁的弯曲疲劳加载。试压机有良好的防锈处理,加载稳定、噪音低,相对液压式疲劳试验机成本大为降低,并可方便地放置在人工气候环境模拟箱中进行疲劳荷载与环境耦合作用下的混凝土试件的耐久性试验,是混凝土试件结构耐久性研究所需的基本设备。
A concrete flexural fatigue loading machine suitable for the material test under coupling action of load and en-vironment was designed and produced.It is composed of loading body,motor,framework and controlling components.Inside the spatial truss structure framework,the motor is fixed on the loading body.The fatigue load can be applied on the specimen by the vertical component of the rotating centrifugal force caused by a circumrotating mass connecting to the motor.The horizontal component of the rotating c...