建筑结构

2014, v.44;No.387(15) 51-56

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低周反复荷载作用下型钢再生混凝土柱延性分析
Ductility analysis on steel reinforced recycled concrete columns under the low cyclic loading

马辉;李宁;薛建阳;
Ma Hui;Li Ning;Xue Jianyang;School of Civil Engineering and Architecture,Xi'an University of Technology;Ningbo Limited Company of Architectural Design and Research Institute;School of Civil Engineering,Xi'an University of Architecture and Technology;

摘要(Abstract):

对17根型钢再生混凝土柱进行了低周反复荷载试验,观察了型钢再生混凝土柱的破坏形态,分析了其滞回曲线特性。在此基础上,研究了型钢再生混凝土柱的延性特征,主要分析了再生粗骨料取代率、轴压比、体积配箍率和剪跨比对柱位移延性系数的影响,并给出了柱的极限位移角限值。结果表明:型钢再生混凝土柱主要发生剪切斜压破坏、弯剪破坏及弯曲破坏;除高轴压比试件外,大剪跨比柱滞回曲线饱满,位移延性系数均大于3,表现出较好的抗震性能;柱延性随着再生粗骨料取代率和轴压比的增大而降低,但随着体积配箍率及剪跨比的增大而增大;柱极限位移角均值约为1/40,表现出较好的位移变形能力。
Seventeen steel reinforced recycled concrete columns were tested under the low cyclic loading. The failure modes and hysteresis curves characteristics of columns were studied. On this basis,the ductility characteristics of columns were researched. The influences of different design parameters such as the recycled coarse aggregate replacement ratio,axial compression ratio,stirrup ratio and shear-span ratio on the displacement ductility coefficient of columns were analyzed. The ultimate lateral angle limiting values of columns were also given. The results show that the shear diagonal compression failure,shear-bending failure and bending failure are the main failure patterns of columns. The hysteretic curves of columns with a large shear-span ratio are plump and the average value of displacement ductility coefficient of columns is more than3,which shows the good seismic performance. With the increment of recycled coarse aggregate replacement ratio and axial compression ratio,the ductility of columns reduces. On the contrary,the ductility of columns increases with the increment of volume stirrup ratio and shear-span ratio. The ultimate average lateral angle limiting values of columns is about 1 /40,which shows the good lateral deformation capacity.

关键词(KeyWords): 型钢再生混凝土;延性;抗震性能;低周反复荷载
steel reinforced recycled concrete;ductility;seismic performance;low cyclic loading

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51178384);; 西安理工大学博士科研启动基金(118-211310)

作者(Author): 马辉;李宁;薛建阳;
Ma Hui;Li Ning;Xue Jianyang;School of Civil Engineering and Architecture,Xi'an University of Technology;Ningbo Limited Company of Architectural Design and Research Institute;School of Civil Engineering,Xi'an University of Architecture and Technology;

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DOI: 10.19701/j.jzjg.2014.15.010

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