{"title":"高强混凝土柱的抗弯强度和延性","authors":"R. Park, H. Tanaka, Bo Li","doi":"10.14359/5902","DOIUrl":null,"url":null,"abstract":"High strength concrete with a specified compressive cylinder strength of up to 70 MPa for ductile elements in seismic design and of up to 100 MPa for other elements is now permitted by the recently revised New Zealand concrete design standard NZS 3101:1995. Also, longitudinal reinforcement with a characteristic yield strength of up to 500 MPa is allowed, and for transverse reinforcement in strength calculations a useable steel stress of up to 500 MPa for shear strength and 800 <Pa for confinement is permitted. For concrete with a concrete compressive cylinder strength greater than 55 MPa the parameters for the equivalent rectangular compressive stress block have been modified to rake into account the stress-strain characteristics of high strength concrete. Also, new design equations for confining reinforcement have been included to better account for the affect of the variation of axial load level. Simulated seismic load tests have been conducted in New Zealand to investigate the behavior of high strength concrete columns confined with normal and very high strength transverse reinforcement. These tests demonstrated that the yield strength of very high strength confining reinforcement may not be attained at the stage when the column reaches the peak flexural strength and that the thickness of concrete cover has an important influence on the behavior of columns.","PeriodicalId":208613,"journal":{"name":"SP-176: High-Strength Concrete in Seismic Regions","volume":"32 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1998-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"7","resultStr":"{\"title\":\"Flexural Strength and Ductility of High-Strength Concrete Columns\",\"authors\":\"R. Park, H. Tanaka, Bo Li\",\"doi\":\"10.14359/5902\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"High strength concrete with a specified compressive cylinder strength of up to 70 MPa for ductile elements in seismic design and of up to 100 MPa for other elements is now permitted by the recently revised New Zealand concrete design standard NZS 3101:1995. Also, longitudinal reinforcement with a characteristic yield strength of up to 500 MPa is allowed, and for transverse reinforcement in strength calculations a useable steel stress of up to 500 MPa for shear strength and 800 <Pa for confinement is permitted. For concrete with a concrete compressive cylinder strength greater than 55 MPa the parameters for the equivalent rectangular compressive stress block have been modified to rake into account the stress-strain characteristics of high strength concrete. Also, new design equations for confining reinforcement have been included to better account for the affect of the variation of axial load level. Simulated seismic load tests have been conducted in New Zealand to investigate the behavior of high strength concrete columns confined with normal and very high strength transverse reinforcement. These tests demonstrated that the yield strength of very high strength confining reinforcement may not be attained at the stage when the column reaches the peak flexural strength and that the thickness of concrete cover has an important influence on the behavior of columns.\",\"PeriodicalId\":208613,\"journal\":{\"name\":\"SP-176: High-Strength Concrete in Seismic Regions\",\"volume\":\"32 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1998-10-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"7\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"SP-176: High-Strength Concrete in Seismic Regions\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.14359/5902\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"SP-176: High-Strength Concrete in Seismic Regions","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.14359/5902","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Flexural Strength and Ductility of High-Strength Concrete Columns
High strength concrete with a specified compressive cylinder strength of up to 70 MPa for ductile elements in seismic design and of up to 100 MPa for other elements is now permitted by the recently revised New Zealand concrete design standard NZS 3101:1995. Also, longitudinal reinforcement with a characteristic yield strength of up to 500 MPa is allowed, and for transverse reinforcement in strength calculations a useable steel stress of up to 500 MPa for shear strength and 800
京公网安备 11010802042870号
京ICP备2023020795号-1
分享
求助内容：
应助结果提醒方式：
扫码关注我们
