预制装配式剪力墙结构墙板节点抗震性能研究
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摘要
为掌握预制装配式剪力墙结构墙板节点的抗震性能,对2个现浇试件和2个预制装配式试件进行了拟静力试验。结合非线性分析手段,从承载能力、变形能力、受力机理以及破坏模式等方面综合分析了其抗震性能,并初步探讨了墙板连接钢筋的合理直径。分析结果表明:与现浇试件相比,预制装配式试件承载能力较高,位移延性系数相同,滞回环均较饱满,具有相当的抗震性能;墙板连接钢筋内力分配比较均匀,节点受力整体性良好;破坏模式均为板根部塑性铰区的弯曲破坏;连接钢筋直径达10 mm即可满足节点受力要求。预制装配式墙板节点具有良好的抗震性能,可作为预制装配式剪力墙结构的一道抗震防线。
To assess the seismic performance of wall-slab joints of new precast concrete shear wall structure,the pseudo-static load test was carried out on two cast-in-situ and two new precast specimens.Combining with the means of nonlinear analysis,the seismic behavior was comprehensively analyzed including carrying capacity,deformability,force mechanism and failure mode and the reasonable wall-slab connect reinforcement's diameter was preliminarily discussed.Analysis results show that compared with cast-in-situ specimens,new precast concrete specimens show their similar seismic performance,i.e.higher carrying capacity,the same displacement ductility coefficient and plump hysteretic circle.The connect reinforcements have even force distribution and the joints perform better force integrity.The failure modes are all bending failure in plastic hinge region in the root of the slab.When the diameter of the connect reinforcement is 10mm,the joints can meet the force-bearing demand.New precast concrete wall-slab joints demonstrate a good seismic performance and can be one seismic fortification line of new precast concrete shear wall structure.
To assess the seismic performance of wall-slab joints of new precast concrete shear wall structure,the pseudo-static load test was carried out on two cast-in-situ and two new precast specimens.Combining with the means of nonlinear analysis,the seismic behavior was comprehensively analyzed including carrying capacity,deformability,force mechanism and failure mode and the reasonable wall-slab connect reinforcement's diameter was preliminarily discussed.Analysis results show that compared with cast-in-situ specimens,new precast concrete specimens show their similar seismic performance,i.e.higher carrying capacity,the same displacement ductility coefficient and plump hysteretic circle.The connect reinforcements have even force distribution and the joints perform better force integrity.The failure modes are all bending failure in plastic hinge region in the root of the slab.When the diameter of the connect reinforcement is 10mm,the joints can meet the force-bearing demand.New precast concrete wall-slab joints demonstrate a good seismic performance and can be one seismic fortification line of new precast concrete shear wall structure.
引文
[1]冼巧玲,李远辉,黄振熙,等.“产业化节能建筑”住宅房屋结构的试验研究[J].地震工程与工程振动,2010,30(4):72-79.
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[3]种迅,孟少平,潘其健,等.部分无黏结预制预应力混凝土框架及其节点抗震能力研究[J].地震工程与工程振动,2007,27(4):55-60.
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[2]范力,吕西林,赵斌,等.装配式预制混凝土框架结构拟动力试验研究[J].地震工程与工程振动,2007,27(6):97-105.
[3]种迅,孟少平,潘其健,等.部分无黏结预制预应力混凝土框架及其节点抗震能力研究[J].地震工程与工程振动,2007,27(4):55-60.
[4]Wu T,Liu B Q,Wang L,et al.Experimental investigation and nonlinear analysis of abnormal interior joints in RC frame structures[C]∥Pro-ceedings of the Tenth International Symposium on Structural Engineering for Young Experts,Vols I and Ii,2008:467-471.
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