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馬宏旺 趙國藩
（大連理工大學(xué)土木系 大連 116023）[提要] 對按現(xiàn)行結(jié)構(gòu)抗震設(shè)計規(guī)范設(shè)計的鋼筋混凝土梁進(jìn)行受彎、受剪可靠度分析，研究了不同荷載比值（地震作用與自重荷載比值）、不同材料強度等級和不同配筋率對梁可靠度的影響。在此基礎(chǔ)上，分析了梁“強剪弱彎”設(shè)計的可靠性。分析結(jié)果表明，按現(xiàn)行規(guī)范設(shè)計的鋼筋混凝土梁“強剪弱彎”設(shè)計的可靠性較低，需提高剪切增強系數(shù)，來滿足設(shè)計需要。在分析梁的可靠度時，采用了Monte Carlo隨機模擬法。
[關(guān)鍵詞] 鋼筋混凝土梁 抗震 受彎 受剪 可靠度 強剪弱彎Reliability analysis of reinforced concrete beams designed based on current seismic code is presented. lnfluences of different ratio of load, materials strength and ratio of reinforcement on reliability index are studied. ln the further work, reliability analysis of stron-shear and weak-bend design is studied, the analysis results indicate that the reliability of strong-shear and weak-bend design is lower, itis needed to raise shearing factor in order to satisfy design requirement.Here, the Monte Carlo simulation is used for the reliability analysis.
Keywords: reinforced concrete beam; seismic; flexure; shear; reliability; strong-shear; weak-bend
