钢纤维长径比变化对全轻混凝土梁抗冲击性能影响  

Effect of Variation of Steel Fiber Length-to-Diameter Ratio on Impact Resistance of All-Lightweight Concrete Beams

作　　者：孙昊 王秀丽[1] 武沁源 牟宗宾 SUN Hao;WANG Xiui;WU Qinyuan;MU Zongbin(School of Civil Engineering,Jilin Jianzhu University,Changchun Jilin 130118,China;Jilin Province Xin'an Property Services Limited Company,Changchun Jilin 130000,China)

机构地区：[1]吉林建筑大学土木工程学院,吉林长春130118 [2]吉林省信安物业服务有限公司,吉林长春130000

出　　处：《北方建筑》2023年第3期3-6,共4页Northern Architecture

基　　金：吉林省科技厅重点研发项目(20210203145SF)。

摘　　要：本文以无钢纤维为对照组,研究不同长径比钢纤维对全轻混凝土梁试件抗冲击性能的影响。采用落锤冲击试验装置对钢纤维全轻混凝土试件进行抗冲击试验,对试验现象和结果进行记录并分析。通过观测记录冲击荷载作用下全轻混凝土梁的裂缝分布、落锤冲击力及跨中位移等试验结果,对比分析表明:掺入纤维筋能有效提高全轻混凝土的抗冲击能力。增加长径比后,全轻混凝土变形能力得到显著提高,进一步增加了全轻混凝土的抗裂性能。In this study,the impact resistance test pieces of all-lightweight concrete beams mixed with steel fibers with different length-to-diameter ratios were tested using non-steel fibers as the control group.The drop hammer impact test device is used to carry out impact test on steel fiber all-light weight concrete specimens,and the test phenomena and results are recorded and analyzed.By observing and recording the test results of crack distribution,drop weight impact force,and span displacement of all-lightweight concrete beams under impact loading,the test results show that:Incorporating fiber reinforcement can effectively improve the impact resistance of all-lightweight concrete.The deformation capacity of all-lightweight concrete was significantly improved by increasing the length-diameter ratio,which further increased the crack resistance of all-lightweight concrete.

关 键 词：钢纤维 长径比 全轻混凝土 抗冲击性能 

分 类 号：TU528.572[建筑科学—建筑技术科学]