原文传递
Effect of Sustained Load on Ultimate Strength of High-Strength Composite Columns Using 800-MPa Steel and 100-MPa Concrete
| 题名： | Effect of Sustained Load on Ultimate Strength of High-Strength Composite Columns Using 800-MPa Steel and 100-MPa Concrete |
| 正文语种： | 英文 |
| 作者： | Chang-Soo Kim; Hong-Gun Park; In-Rak Choi, Ph.D.;Kyung-Soo Chung, Ph.D. |
| 作者单位： | Shandong Jianzhu Univ;Seoul National Univ;Senior Researcher, POSCO Steel Solution Center;Principal Researcher, POSCO Steel Solution Center |
| 关键词： | Composite column; Sustained load; Creep and shrinkage; High-strength steel; High-strength concrete; Eccentric loading; Metal and composite structures. |
| 摘要： | To investigate the effect of sustained loads on the ultimate strength of high-strength composite columns using grade 800-MPa steel and 100-MPa concrete, ultimate load tests were performed after long-term loading. Two concrete-encased steel (CES) columns were tested under concentric loading, and a CES column and a concrete-filled steel tube (CFT) column were tested under eccentric loading. The test results showed that stress-relaxation in the concrete and gradual stress-transfer to the steel and longitudinal bars occurred, and the ultimate shrinkage strain and ultimate creep coefficient of the high-strength concrete were estimated as 553 and 1.44, which are lower than those of normal-strength concrete but belong to the ranges specified in concrete standards. To confirm the tests, a numerical parametric study was performed, considering the age-adjusted effective modulus and relaxation. The results of the experimental and numerical studies showed that, in the case of the high-strength composite columns, the sustained load increased deformation (axial strain and curvature) at service load conditions, but the detri mental effect on the ultimate strength was not significant. The factors for the long-term effect specified in current design codes gave good predictions for the long-term effective flexural stiffness. DOI: 10.106l/(ASCE)ST.1943-541X.0001676. © 2016 American Society of Civil Engineers. |
| 出版日期： | 2017.03 |
| 出版年： | 2017 |
| 期刊名称： | Journal of Structural Engineering |
| 卷： | Vol.143 |
| 期： | NO.03 |
| 页码： | 04016189 |
相关文献
- Eccentric Axial Load Test for High-Strength Composite Columns of Various Sectional Configurations
- Axial Compressive Behavior of Square Spiral-Confined High-Strength Concrete-Filled Steel-Tube Columns
- Axial Compressive Behavior of Concrete-Encased High-Strength Steel Angle Columns
- Investigation on Postfire Residual Capacity of High-Strength Steel Columns with Axial Restraint
- High-Strength Rectangular CFT Members: Database, Modeling, and Design of Short Columns
- Experimental Investigation of Concrete-Filled High-Strength Steel Tubular X Joints
检索历史
应用推荐
