全级配混凝土弯拉试件动态力学性能试验研究

Experimental Study on the Dynamic Properties of the FullyGrade Concrete under Flexural-Tensile Test

在地震循环往复作用下,全级配混凝土的材料动态力学性能对高坝抗震安全设计具有重要意义。本文借助15MN大型动态材料试验机,利用专用弯拉装置,对全级配混凝土弯拉试件在单向静动载、单向循环动载、双向循环静动载荷载作用下的力学性能进行了试验研究,获得了不同荷载作用对全级配混凝土弯拉强度的影响,并对双向循环静载、动载下全级配混凝土弯拉应力—应变曲线变化规律进行了研究。

The dynamic properties of full-grade concrete are very important in seismic safety design of high dams.An experimental study of the properties of full-grade concrete was carried out by using the 15 MN large-scale dynamic material testing system and the special bending device.The influence of different loads on the bending strength of full-grade concrete is obtained,such as the unidirectional static and dynamic loading,the unidirectional cyclic dynamic loading,and the bidirectional cyclic static and dynamic loading.The variation of the flexural-tensile stress-strain curve of full-grade concrete was studied under the bidirectional cyclic static and dynamic loading.