- 摘 要
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楊 政， 侯 健， 邱明星
（西安交通大學(xué)土木工程系，西安710049）[摘要] 通過對采用不同強度等級鋼筋和混凝土的軸心受壓短柱的受力過程進行分析，研究了鋼筋強度、混凝土強度以及配筋率對鋼筋混凝土短柱最大承載力的影響。分析結(jié)果表明：由于鋼筋和混凝土的非線性性能，受壓鋼筋混凝土短柱的最大承載力并不總是等于混凝土和鋼筋兩種材料各自最大承載力之和；鋼筋混凝土短柱的最大承載力取決于鋼筋、混凝土的力學(xué)性能以及短柱的配筋率，其值有可能小于混凝土和鋼筋最大承載力之和；短柱最大承載力與混凝土和鋼筋最大承載力之和的差值取決于鋼筋、混凝土的力學(xué)性能和截面的配筋率。分析還表明，數(shù)值分析得到的鋼筋混凝土短柱承載力比按我國現(xiàn)行規(guī)范計算得到的承載力大3% ~10%，采用規(guī)范的方法計算鋼筋混凝土短柱的承載力是偏于安全的。
[關(guān)鍵詞] 鋼筋混凝土；短柱；軸心受壓；承載力
中圖分類號：TU375.3 文獻標識碼：A 文章編號：1002-848X(2011) S2-0150-06Analysis on bearing capacity of axially compressed RC short columns
Yang Zheng, Hou Jian, Qiu Mingxing
( Department of Civil Engineering, Xi' an Jiaotong University, Xi' an 710049, China)Abstract: The bearing capacity of axially compressed RC shoIt columns was calculated by numerical method, the effect of the strength of reinforcement and concrete, and ratio of reinforcement on the maximal bearing capacity was investigated. The results show that the maximal bearing capacity of shoIt columns is not always equal to the sum of the maximal bearing capacity of two materials due to the nonlinear mechanical behavior of reinforcement and concrete. The maximums are dependent on the mechaIucal property of reinforcement and concrete and ratio of reinforcement, and the maximums may be less than the sum of the maximal bearing capacity of reinforcement and concrete. In comparison with the applied code for design of concrete structures, it is shown that the maximal bearing capacity based on numerical method is 3 percent t0 10 percent larger than that based on the applied code, and the values of bearing capacity based on the applied code are safe.
Keywords: reinforced concrete; short column; axially compression; bearing capacity
