{"title":"冲击荷载作用下CFST构件力学响应的标度效应:钢比的影响","authors":"Liu Jin, Qian Fu, Renbo Zhang, Jian Li, Xiuli DU","doi":"10.1016/j.ijimpeng.2025.105398","DOIUrl":null,"url":null,"abstract":"<div><div>Due to the existence of scaling effect, the impact resistance of geometrically similar CFST components is no longer similar. So whether the steel ratio will affect the scaling effect of the impact resistance for geometrically similar CFST components has not been clearly concluded. Based on this, in order to study the influence of steel ratio on the scaling effect of the impact resistance, geometrically similar (<em>λ</em>=1,2,3,4) CFST components with seven steel ratios were designed for impact numerical simulation. It is found that the increase of steel ratio weakens the scaling effect of the impact response for geometrically similar CFST components, such as damage deformation, energy absorption and impact force, etc. The main reason is that the increase of steel ratio weakens the difference of plastic deformation range and degree in mid-span impacted area for geometrically similar CFST components during the whole impact process, which leads to a significant reduction in the difference of deflection deformation, contact stiffness, inertial force and stress wave propagation. In addition, this study also proposes the calculation formulas of scaling effect considering the steel ratio. It is expected to provide support for the engineering application promotion and the theoretical in-depth study of impact resistance for the CFST components.</div></div>","PeriodicalId":50318,"journal":{"name":"International Journal of Impact Engineering","volume":"205 ","pages":"Article 105398"},"PeriodicalIF":5.1000,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Scaling effect of mechanical response for CFST component subjected to impact load: The effect of steel ratio\",\"authors\":\"Liu Jin, Qian Fu, Renbo Zhang, Jian Li, Xiuli DU\",\"doi\":\"10.1016/j.ijimpeng.2025.105398\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Due to the existence of scaling effect, the impact resistance of geometrically similar CFST components is no longer similar. So whether the steel ratio will affect the scaling effect of the impact resistance for geometrically similar CFST components has not been clearly concluded. Based on this, in order to study the influence of steel ratio on the scaling effect of the impact resistance, geometrically similar (<em>λ</em>=1,2,3,4) CFST components with seven steel ratios were designed for impact numerical simulation. It is found that the increase of steel ratio weakens the scaling effect of the impact response for geometrically similar CFST components, such as damage deformation, energy absorption and impact force, etc. The main reason is that the increase of steel ratio weakens the difference of plastic deformation range and degree in mid-span impacted area for geometrically similar CFST components during the whole impact process, which leads to a significant reduction in the difference of deflection deformation, contact stiffness, inertial force and stress wave propagation. In addition, this study also proposes the calculation formulas of scaling effect considering the steel ratio. It is expected to provide support for the engineering application promotion and the theoretical in-depth study of impact resistance for the CFST components.</div></div>\",\"PeriodicalId\":50318,\"journal\":{\"name\":\"International Journal of Impact Engineering\",\"volume\":\"205 \",\"pages\":\"Article 105398\"},\"PeriodicalIF\":5.1000,\"publicationDate\":\"2025-05-19\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"International Journal of Impact Engineering\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0734743X25001782\",\"RegionNum\":2,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ENGINEERING, MECHANICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Impact Engineering","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0734743X25001782","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, MECHANICAL","Score":null,"Total":0}
Scaling effect of mechanical response for CFST component subjected to impact load: The effect of steel ratio
Due to the existence of scaling effect, the impact resistance of geometrically similar CFST components is no longer similar. So whether the steel ratio will affect the scaling effect of the impact resistance for geometrically similar CFST components has not been clearly concluded. Based on this, in order to study the influence of steel ratio on the scaling effect of the impact resistance, geometrically similar (λ=1,2,3,4) CFST components with seven steel ratios were designed for impact numerical simulation. It is found that the increase of steel ratio weakens the scaling effect of the impact response for geometrically similar CFST components, such as damage deformation, energy absorption and impact force, etc. The main reason is that the increase of steel ratio weakens the difference of plastic deformation range and degree in mid-span impacted area for geometrically similar CFST components during the whole impact process, which leads to a significant reduction in the difference of deflection deformation, contact stiffness, inertial force and stress wave propagation. In addition, this study also proposes the calculation formulas of scaling effect considering the steel ratio. It is expected to provide support for the engineering application promotion and the theoretical in-depth study of impact resistance for the CFST components.
期刊介绍:
The International Journal of Impact Engineering, established in 1983 publishes original research findings related to the response of structures, components and materials subjected to impact, blast and high-rate loading. Areas relevant to the journal encompass the following general topics and those associated with them:
-Behaviour and failure of structures and materials under impact and blast loading
-Systems for protection and absorption of impact and blast loading
-Terminal ballistics
-Dynamic behaviour and failure of materials including plasticity and fracture
-Stress waves
-Structural crashworthiness
-High-rate mechanical and forming processes
-Impact, blast and high-rate loading/measurement techniques and their applications