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THE SHRINKAGE OF EXPANSIVE concrete filled steel tube AND ITS IMPROVEMENT METHOD

Journal of Wuhan University of Technology(Materials Science) 1999年第1期14卷 46-51页

作者： Li, Y Hu, SG Ding, QJ Zhou, MK Zhang, YS Wuhan Univ Technol Coll Mat & Engn Wuhan 430070 Peoples R China

The shrinkage characteristics tics of expansive concrete filled steel tube (CFST) are analyzed, Cold shrinkage, creep and autogenous shrinkage are considered as the main reasons of causing CFST contraction. In accordance with the shrinkage characteristics of expansive CFST, a kind of energy-stored delayed expansive agent is exploited, which can not only compensate the shrinkage of the core concrete in every stages, but also make CFST expand according to the delayed expansion mechanism. As the result, the prestress loss weill be reduced and expansive energy will be utilized effectively.

关键词： concrete filled steel tube shrinkage mechanism expansive agent expansive model

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维普期刊数据库

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Bearing capacity of composite columns reinforced by concrete filled steel tube

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Journal of Chongqing University 2013年第1期12卷 27-34页

作者：韦建刚 ZHU Pu CHEN Bao-chun College of Civil Engineering Fuzhou University

In this study, nine simplified short composite columns consisting of core CFST (concrete filled steel tube) of different diameters and outer reinforced concrete were constructed to study their compressive performance under axial or eccentric compression. The failure mode is characterized by the crush of the outer concrete. The bearing capacity increases at first and then decreases with further increase of the position coefficient. It can be concluded that position coefficient is an important structural parameter that has considerable influences on the ultimate bearing capacity of the composite columns. The outer concrete, steel tubes and longitudinal reinforcement are found to work in a cooperative manner under axial or eccentric compression when the position coefficient is about 0.5. An improved bearing capacity algorithm that takes the position coefficient into account has been proposed based on the experimental and simulation results and current technical specification in China. It has been proven to be precise and safe.

关键词： concrete filled steel tube composite column position factor test formula

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维普期刊数据库

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Seismic behavior of concrete filled steel tubular arch structures

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Earthquake Engineering and Engineering Vibration 2005年第1期4卷 107-115页

作者：熊峰 Sashi K Kunnath 刘浩吾 Dept. of Civil Engineering Sichuan University Chengdu 610065 ChinaProfessor Dept. of Civil and Environmental Engineering California University at Davis CA95616 USAProfessor Dept. of hydraulic Engineering Sichuan University Chengdu 610065 ChinaProfessor

Shaking table tests of a 1:10 scale arch model performed to investigate the seismic behavior and resistance of concrete filled steel tubular (CFT) arch structures are described in this paper. The El-Centro record and Shanghai artificial wave were adopted as the input excitation. The entire test process can be divided into three stages depending on the lateral brace configurations, i.e., fully (five) braced, two braces removed, and all braces removed. A total of 46 tests, starting from the elastic state to failure condition, have been conducted. The natural vibration frequencies, responses of acceleration, displacement and strain were measured. From the test results, it is demonstrated that the CFT arch structures are capable of resisting severe ground motions and that CFT arches offer a credible alternative to reinforced concrete arches, especially in regions of high seismic intensity.

关键词： concrete filled steel tube arch structures shaking table test seismic behavior lateral braces

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维普期刊数据库

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钢管高强膨胀混凝土的力学性能研究

钢管高强膨胀混凝土的力学性能研究

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全国高强与高性能混凝土及其应用专题研讨会

作者：李悦金彩云北京工业大学建工学院北京工业大学应用数理学院

＜正＞一、前言钢管混凝土是将素混凝土灌入钢管而形成的一种组合材料。与传统的钢筋混凝土结构相比,它具有承载力高、重量轻、塑料韧性好、施工方便及节省水泥木材等诸多优点。近年来这种新型结构正愈来愈受到人们的重视,在国内外已得... 详细信息

＜正＞一、前言钢管混凝土是将素混凝土灌入钢管而形成的一种组合材料。与传统的钢筋混凝土结构相比,它具有承载力高、重量轻、塑料韧性好、施工方便及节省水泥木材等诸多优点。近年来这种新型结构正愈来愈受到人们的重视,在国内外已得到了较深入的研究及广泛的推广应用。与普通钢管混凝土相比,钢管高强膨胀混凝土具有很多优点,其核心混凝土中掺加了膨胀组分,建立了前期主动紧箍力,使钢管与核心混凝土在受荷载作用之前就产生紧箍

关键词： concrete filled steel tube High strength Expansion Finite element method

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