钢管混凝土受压构件的工作性能oncreteilledteelube

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2 钢管混凝土的特点与应用

钢管混凝土在拱桥结构中得到广泛应用。拱桥跨度不大(100m以下)时，主拱可采用单管截面；跨度较大时，可采用哑铃形截面、多管桁式截面或集束式截面, 如下图所示。

3 钢管混凝土受压构件的工作性能

试验证明，上述三种加载方式对压力(N)-核心混凝土纵向应变(εc)曲线(简称N- εc曲线)的变形特征有显著影响。

加载方式对N-εc曲线的影响

在荷载作用下，钢管的纵向应变es与核心混凝土的纵向应变ec并不协调一致。钢管表面的纵向应变 es 明显小于核心混凝土的纵向应变 ec, 通常以核心混凝土的 N-ec曲线，作为描述和评价钢管混凝土受压构件力学行为的依据。

钢管和核心混凝土的荷载-应变曲线

钢管外径D与其厚度t之比(简称径厚比). D/t ≥ 20的钢管混凝土轴心受压短柱的N-ec  典型曲线。在较低的荷载阶段，N-ec大致为一直线(图中的OAB段)。当荷载增加至B点，钢管开始屈服，其表面或出现吕德尔斯滑移斜线，开始有铁皮剥落，N-ec曲线明显偏离其初始的直线。随着荷载增加而不断减小，直至C点处 ，荷载达到最大值。对于 D/t 值较大的薄壁钢管混凝土试件，在 N-ec曲线的下降过程中，钢管被胀裂，出现纵向裂缝而完全破坏；对于 D/t 值较小的试件，在荷载缓慢下降过程中，变形仍持续发展而不破坏。

4 附加参考文献

[1] Y. Ouyang, A.K. H. Kwan, S.H. Lo and J.C. M. Ho, Finite element analysis of concrete-filled steel tube (CFST) columns with circular sections under eccentric load, Engineering Structures 148 (2017) 387–398.

[2] F.X. Ding, L. Fu and Z.W. Yua, Behaviors of axially loaded square concrete-filled steel tube (CFST) Stub columns with notch in steel tube, Thin–Walled Structures 115 (2017) 196–204.

[3] Perea, T. (2010). “Analytical and Experimental Study on Composite Concrete-Filled Steel Tube Beam-Columns” Ph.D. Thesis, School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA.

[4] Chang, X., et al. (2014). "Analysis of circular concrete-filled steel tube (CFT) support in high ground stress conditions." Tunnelling and Underground Space Technology 43(0): 41-48.

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钢管混凝土受压构件的工作性能oncreteilledteelube

0.LetPubTHINLetPub整理了最新的THIN-WALLED STRUCTURES 期刊投稿经验, 期刊官方投稿网址,影响因子,审稿周期/时间,研究方向,SCI期刊分区,中国作者发表的文章等信息, 以供中国作者投稿前参考。jvzq<84yyy4mg}uwd0ipo7hp1kteg3rjrEqcpj?lq{spjqcrr,wkn|?fgzbku+lqwxocunf?9>26
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9.ThinWalledStructuresAdvancesandDevelopments50% off was US $845.00US $845.00 now US $422.50US $422.50 Hardback now US $435.00US $435.00 eBook (PDF) now US $410.00US $410.00 Institutional subscription on ScienceDirect This volume contains the papers presented at the Third International Conference on Thin-Walled Structures, Cracow, Polandjvzq<84yyy4fn|jxkgx/exr1dqulu8yjkp3xcuqgf/yut~hvwtkt/jixcpifu6fpf/jfxnqqrokov|4|ctgt1B<:/231:6565;;6/?
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14.同济大学主页主页平台管理系统多高层钢结构及钢结构抗火研究室12. Xu, Qing; Li, Guo-Qiang*; Wang, Yong C. A simplified method for calculating non-uniform temperature distributions in thin-walled steel members protected by intumescent coatings under localized fires Thin-Walled Structures, 2021, 162: 107580 SCI(E)(000649713100006) EI(20210909996792) jvzquC41hcivn}~/ek|jnnsi0vuoisn0gf{/ew4fiemki8jaET0|q~o13<248qkuv5jpmjz0jzn
15.白江波北京航空航天大学( SCI Q1区, 2025年起) 期刊客座编辑/Guest Editor: Polymers (SCI Q1区)、Materials (SCI Q1区) 青年编委: 复合材料学报(2024年起) 中国力学学会MTS材料试验协作专业委员会委员 Composite Structures、Thin-walled Structures、Engineering Structures、Textile Research Journal等 国际期刊审稿人,国家自然科学基金函评jvzquC41yy}/z6rqn0ipo8zpkxksury{1hgdwuy{14879:9
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17.CrashworthinessOptimizationDesignofThinIntroduction Theoretical Models of Re-entrant Triangles Honeycomb Certification of Theoretical Models Optimization of Unit Cell Topology Optimization of Thin-Walled Tube Analysis Results and Discussion Conclusions References Acknowledgements Author information Rights and permissions About this article AdvertisementDiscjvzquC41nktl0|utkpmft7hqo1gsvrhng1710:5291y54::6/27:/9527338
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24.中心论文成果情况统计表The Dynamic Similitude Design Method of Thin Walled Structures and Experimental Validation 罗忠 SHOCK AND VIBRATION 2016 SCI 251 Analysis of the Equivalent Surface Current Model for the Permanent Magnet Bearing by Using the Integral Definition Zhang Haibo(蒋书运) Journal of Mechanical Engineering 2016 jvzq<84ooo4en~y0gf{/ew4kphu039>4146557mvo