Journal of South China University of Technology (Natural Science Edition) ›› 2008, Vol. 36 ›› Issue (12): 28-33.

• Architecture & Civil Engineering • Previous Articles     Next Articles

Parameter Analysis for Mechanical Properties of Steel-Reinforced Concrete Transfer Girders with Inner Steel Truss

Yang Chun 1.2  Wu Yi 3  Cai Jian 1.2  Chen Qing-jun 1.2 Su Guo-wei4   

  1.  1. School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510640, Guangdong, China; 2. State Key Laboratory of Subtropical Building Science, South China University of Technology, Guangzhou 510640, Guangdong, China; 3. College of Civil Engineering, Guangzhou University, Gnangzhou 510006, Guangdong, China; 4. Architectural Design and Research Institute, Tongji University, Shanghai 200092, China
  • Received:2008-06-18 Online:2008-12-25 Published:2008-12-25
  • Contact: 杨春（1973-），男，博士，讲师，主要从事钢-混凝土组合结构、高层建筑结构研究． E-mail:chyang@scut．edu．cn
  • About author:杨春（1973-），男，博士，讲师，主要从事钢-混凝土组合结构、高层建筑结构研究．
  • Supported by:

    国家自然科学基金资助项目（50878087）;广东省自然科学基金资助项目（8451064101000286）;广州市教育局科技计划项目（62063）

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Abstract:

In this paper, the mechanical properties of steel-reinforced concrete transfer girders with inner steel truss which are affected by the angle of steel diagonal members, the ratio of bottom longitudinal reinforcements and the ratio of web reinforcements, etc. , are analyzed by means of the finite element method, and the corresponding force transfer mechanism is investigated. The results show that （ 1 ） the rigidity and limited bearing capacity of the transfer girders increase with the angle of steel diagonal members; （2） as compared with horizontal steel ties, steel diagonal members play a more important role in the force transfer; （3） as horizontal tension members greatly enhance the rigidity, ultimate the bottom longitudinal reinforcements working bearing capacity and ductility of transfer girders at a reinforcement ratio of less than 1.18% ; （4） the increase of web reinforcement ratio results in a significant enhancement of the ductility of transfer girders; （5） the transfer girders exhibit a strut-and-tie force transfer mode; and （6） the cross section of the concrete diagonal strut, a kind of fish-bellied member, is big in the middle while small at the two ends.

Key words: inner steel truss, steel-reinforced concrete, transfer girder, mechanical property, parameter analysis, finite element method