Journal of Experiental Mechanicals

火灾后T形型钢混凝土柱偏心受压力学性能试验研究

Experimental Investigation on Mechanical Properties of T-Shaped Steel Reinforced Concrete Column Subjected to Eccentric Compression after the Fire

Received:April 09, 2016 Revised:June 02, 2016

DOI：10.7520/1001-4888-16-062

中文关键词: T形型钢混凝土柱火灾后偏心受压力学性能截面特性

英文关键词:T-shaped steel reinforced concrete (SRC) column after the fire eccentric compression mechanical properties section properties

基金项目:国家自然科学基金项目(51178232)

Author Name	Affiliation
GAO Li-tang*	School of Civil Engineering, Qingdao Technological University, Qingdao 266033, China
CAI Wei-pei	School of Civil Engineering, Qingdao Technological University, Qingdao 266033, China
WANG Du	School of Civil Engineering, Qingdao Technological University, Qingdao 266033, China

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中文摘要:

对7根T形型钢混凝土柱进行了火灾后的力学性能试验研究。火灾试验按照ISO834标准升温过程进行控制,1根未受火试件作为对比。T形型钢混凝土柱采用空腹式配钢形式,横向腹杆间距为200mm,试件通过偏心受压试验,考虑加载角和偏心距的影响。通过试验得到异形柱极限承载力、截面应变分布、荷载-挠度曲线以及截面特性。试验结果表明：(1)受火1h后,T形型钢混凝土柱仍然具有比较高的竖向承载力;(2)桁架式配钢方式以及合理的腹杆、箍筋布置保证了型钢与混凝土之间能够较好的协同工作,平截面假定对火灾后的T形型钢混凝土柱仍然适用;(3)荷载角和偏心距对试件的延性和变形能力影响显著。

英文摘要:

Experimental investigation on mechanical properties of 7 T-shaped steel reinforced concrete (SRC) columns after the fire was carried out, its results is presented in this paper. The fire experiment was controlled by ISO834 standard heating process. One specimen no subjected to fire experiment was selected for comparison. T-shaped SRC specimens adopts the hollow steel form; the transverse rod spacing is 200mm; taking into account the influence of loading angle and eccentricity, specimens were subjected to eccentric compression. The ultimate bearing capacity, the section strain distribution, the load-deflection curve and the section characteristics of special shaped column specimens were obtained by experiment, respectively. Experimental results show (1) after 1 hour fire experiment, T-shaped SRC columns still have relatively high vertical bearing capacity; (2) truss type steel and reasonable web rod and stirrup layout ensure steel and concrete work together well; the plane section assumption is still applicable to T-shaped SRC columns after the fire; (3) The influence of load angle and eccentricity on the ductility and deformation capacity of the specimen is significant.

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