高温对建筑混凝土材料抗震抗压的作用及原理

doi:10.13229/j.cnki.jdxbgxb201505009

吉林大学学报(工学版) ›› 2015, Vol. 45 ›› Issue (5): 1436-1442.doi: 10.13229/j.cnki.jdxbgxb201505009

高温对建筑混凝土材料抗震抗压的作用及原理

苏迎社¹, 杨媛媛²

1.长安大学工程设计研究院,西安 710064;
2.长安大学建筑学院,西安 710061

收稿日期:2014-01-28 出版日期:2015-09-01 发布日期:2015-09-01
作者简介:苏迎社(1963-）,男,高级工程师,硕士生导师.研究方向:建筑工程设计.E-mail:2664482308@qq.com
基金资助:
陕西省社会发展攻关计划项目(2014K15-01-01)

Seismic compression performance of the concrete under high temperature

SU Ying-she¹, YANG Yuan-yuan²

1.Civil Engineering Design Academy, Chang'an University,Xi'an 710064, China;
2.School of Architecture, Chang'an University,Xi'an 710061, China

Received:2014-01-28 Online:2015-09-01 Published:2015-09-01

摘要/Abstract

摘要： 分两次试验分别对高温作用下混凝土材料的抗压强度变化与抗震性能变化进行了相关的研究。将未受火的试件与受火试件进行对比,通过对混凝土破坏形态的研究,运用SPSS统计分析软件对温度与抗压强度的变化进行整理,得出温度静置时间与抗压强度的关系;通过对受火后试件骨架曲线,刚度、延展性和承载力的分析,得出结论:高温作用后,试件的屈服载荷、峰值载荷和极限载荷均大幅度降低,而剪承载力则随着轴压比的增大而增大,超过一定界限后,反而会降低。同时,本文提出了受剪承载力的计算公式,在实际生活中,可将该公式作为火灾后的建筑物破坏鉴定。

关键词: 混凝土材料, 破坏形态, 抗压强度, 抗震性能, 受剪承载力

Abstract: Two tests were carried out respectively in this research, one to investigate the variation of the compressive strength of concrete, and one to investigate the seismic performance under high temperature. Comparing the unfired specimens and the fired specimens, through the study of concrete failure modes, using SPSS statistical analysis software to process the changes of temperature and compressive strength, the relationship between temperature standing time and compressive strength was obtained. Through the analysis of the skeleton curve, stiffness, ductility and bearing capacity of fired specimens, the following conclusions can be drawn: after high temperature, the yield load, peak load and ultimate load of the specimens are significantly reduced; while the shear load increases with the axial compression ratio, however when the axial compression ratio proceeds exceeds certain limit, the shear load decreases. Furthermore, a shear capacity formula was proposed, which can be used to identify the extent of building damage after a fire hazard.

Key words: concrete materials, failure modes, compressive strength, seismic performance, shear capacity

中图分类号:

TU431

苏迎社, 杨媛媛. 高温对建筑混凝土材料抗震抗压的作用及原理[J]. 吉林大学学报(工学版), 2015, 45(5): 1436-1442.

SU Ying-she, YANG Yuan-yuan. Seismic compression performance of the concrete under high temperature[J]. 吉林大学学报(工学版), 2015, 45(5): 1436-1442.

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高温对建筑混凝土材料抗震抗压的作用及原理

Seismic compression performance of the concrete under high temperature

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