基于三点弯曲试验的坝体模型材料研究  

Study of Dam Body Modeling Materials Based on Three-point Bending Test

作　　者：黄冠 涂劲[1] 钟红 HUANG Guan;TU Jin;ZHONG Hong(China Institute of Water Resources and Hydropower Research,Beijing 100048,China)

机构地区：[1]中国水利水电科学研究院,北京100048

出　　处：《水电能源科学》2025年第1期70-73,191,共5页Water Resources and Power

基　　金：中国华能集团有限公司科技项目(HNKJ22-H108);中国电力建设股份有限公司科技项目(DJ-ZDXM-2021-03);流域水循环模拟与调控国家重点实验室自主研究课题(SKL2024YJTS13)。

摘　　要：我国西南西北强地震区建设有多座高混凝土坝,采取适宜的抗震措施可有效改善大坝的抗震性能。纤维混凝土为混凝土坝抗震加固措施之一,为研究纤维混凝土模型材料的抗弯性能随纤维掺量的变化,按照质量掺量,设计1组对照组(0%)和6组试验组(0.17%、0.33%、0.67%、1.00%、1.33%、1.67%),采用三点弯曲试验测试了纤维混凝土的抗弯性能。结果表明,纤维掺量对材料的强度和变形性能影响均很大;随着纤维掺量的提高,材料的抗弯强度先略有降低之后明显提高,掺量为1.00%时,试块的弯拉强度最大,之后随着掺量提高强度不再增长;峰值荷载位移与纤维掺量大体上呈线性关系。China builds many high concrete dams in the strong seismic area of southwest and northwest,and adopting appropriate seismic measures can effectively improve the seismic performance of the dams.The fiber-concrete solution was one of the alternatives.This paper focused on the variation of flexural properties of fiber concrete model materials with fiber admixture.The tests were designed with one control group(0%)and six experimental groups(0.17%,0.33%,0.67%,1.00%,1.33%,1.67%).According to the mass admixture,and the flexural properties of the fiber concrete were tested using a three-point bending test.Tests show that the fiber doping on the strength and deformation properties of the material have a great impact.With the increase of fiber doping,the material's flexural strength first slightly reduced after a significant increase in the dosage of 1.00%,the maximum bending and tensile strength of the specimen,and then with the increase of dosage,the strength is no longer grow.Peak load displacement was roughly linear with fiber dosage.

关 键 词：混凝土坝模型材料 麻纤维 纤维混凝土 三点弯曲试验 弯拉强度 峰值荷载位移 

分 类 号：TV41[水利工程—水工结构工程]