鋼管混凝土框架結(jié)構(gòu)抗震性能的試驗研究*
李忠獻1 許成祥12 王冬1 王成博1
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（1天津大學(xué)建筑工程學(xué)院；2江漢石油學(xué)院土建系）
［提要］ 按照現(xiàn)行規(guī)范的有關(guān)規(guī)定設(shè)計制作了一榀兩跨3層鋼梁’圓鋼管混凝土柱的鋼管混凝土框架結(jié)構(gòu)模型，并通過施加恒定豎向荷載和低周反復(fù)水平荷載，對模型框架進行了抗震性能試驗研究。結(jié)果表明，基于現(xiàn)行規(guī)范所設(shè)計的鋼管混凝土框架在地震時能形成梁鉸破壞機制，框架的變形能力、承載能力、延性、耗能能力等受力性能均滿足延性框架的抗震要求，且模型框架的有效延性系數(shù)達到了7.54，遠大于一般延性框架延性系數(shù)應(yīng)不小于4.0的要求。由此可以得出結(jié)論，鋼管混凝土框架結(jié)構(gòu)的抗震性能優(yōu)于鋼筋混凝土框架結(jié)構(gòu)和鋼框架結(jié)構(gòu)，可在我國中高層住宅建筑中推廣應(yīng)用。［關(guān)鍵詞］ 鋼管混凝土,框架結(jié)構(gòu),抗震性能,模型試驗,低周反復(fù)水平荷載,延性,承載力耗能Abstract: According to the related specifications in current Chinese codes，a 2 bays，3-stories model of concrete-filled steel tubular(CFST)frame is designed and manufactured，and the experimental research on its seismic behavior is carried out under vertical stable loads and lateral cyclic loads．The test results show that the CFST frame may form the beam hinged collapse mechanism under lateral cyclic loads，and its deformation capacity，bearing capacity，ductility and energy dissipation may meet the requirement for seismic design of ductile frames，in which the effective ductility factor of the model frame reaches 7．54 and is far greater than the required value 4．0 of the ordinary ductile frames．The seismic performance of the CFST frames is superior to that of reinforced concrete frames or steel frames，SO that the CFST frames may be broadly applied to the multistory residential buildings in our country．Keywords：concrete-filled steel tubular(CFST)frame; seismic behavior; model experiment; lateral cyclic load; ductility; bearing capacity; energy dissipation
