损伤方钢管混凝土加固框架低周反复荷载试验研究
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摘要
对一榀损伤的三层两跨的方钢管混凝土框架模型在腹板和翼缘加焊钢板以加固节点,并在框架钢梁两端各削掉20 mm的圆弧,俗称"狗骨式削弱",用以达到强节点、强锚固、强柱弱梁的效果.研究了该加固后框架在低周反复水平荷载作用下的荷载-位移曲线、梁柱相对转角、节点延性、节点破坏机制和破坏特点等抗震性能.研究结果表明,用这种方法加固后方钢管混凝土框架承载力有所提高,抗震性能良好.
A destructive 3-floor 2-span concrete-filled steel square tubular frame model is experimented again.This mode is reinforced on the joint and weakened on the ends of the beam which is called dog-bone weaken to achieve the aim of strong joint,strong anchor,strong column and weak beam.By exerting low reversed cyclic loads on the reinforced model,the seismic performance is analyzed,including the load-deformation curve of the joints,the joint ductility,the joint failure mechanism,the failure characteristics and so on that The results indicate the reinforced concrete-filled steel square tubular frame has a higher carrying capacity and good seismic performance.
A destructive 3-floor 2-span concrete-filled steel square tubular frame model is experimented again.This mode is reinforced on the joint and weakened on the ends of the beam which is called dog-bone weaken to achieve the aim of strong joint,strong anchor,strong column and weak beam.By exerting low reversed cyclic loads on the reinforced model,the seismic performance is analyzed,including the load-deformation curve of the joints,the joint ductility,the joint failure mechanism,the failure characteristics and so on that The results indicate the reinforced concrete-filled steel square tubular frame has a higher carrying capacity and good seismic performance.
引文
[1]韩林海.钢管混凝土结构——理论与实践[M].科学出版社,2004.
[2]王来,王铁成,邓芃.方钢管混凝土框架内隔板节点抗震性能的试验研究[J].地震工程与工程振动,2005,25(1):76-80.
[3]王来,王铁成,陈倩.低周反复荷载下方钢管混凝土框架抗震性能的试验研究[J].地震工程与工程振动,2003,23(3):113-117.
[4]王来,王铁成,齐建伟,史丙成.方钢管混凝土框架滞回性能试验与理论研究[J].天津大学学报,2005,38(1):41-46.
[2]王来,王铁成,邓芃.方钢管混凝土框架内隔板节点抗震性能的试验研究[J].地震工程与工程振动,2005,25(1):76-80.
[3]王来,王铁成,陈倩.低周反复荷载下方钢管混凝土框架抗震性能的试验研究[J].地震工程与工程振动,2003,23(3):113-117.
[4]王来,王铁成,齐建伟,史丙成.方钢管混凝土框架滞回性能试验与理论研究[J].天津大学学报,2005,38(1):41-46.
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