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Experimental and numerical studies on the seismic performance of superimposed reinforced concrete shear walls with insulation
Engineering Structures ( IF 5.6 ) Pub Date : 2021-05-01 , DOI: 10.1016/j.engstruct.2021.112372
Qing Jiang , Jie Shen , Xun Chong , Ming Chen , Hanqin Wang , Yulong Feng , Junqi Huang

A new type of superimposed reinforced concrete shear wall with insulation (SRCSWI) is proposed in this paper by integrating the insulation panel into the precast exterior concrete panel to achieve both bearing and insulation capabilities. Four full-sized specimens, including one cast-in-place reinforced concrete shear wall (CRCSW), two SRCSWIs and one superimposed reinforced concrete shear wall (SRCSW) without insulation, were designed for use in pseudo-static tests. The test results showed that the failure modes of the SRCSWIs were similar to those of the CRCSW and SRCSW. For the SRCSWI with a lower reinforcement ratio for the boundary elements, fewer cracks occurred in the wall, while the opening width of the cracks in the horizontal joints was relatively large, which means that the plastic deformation of this specimen was concentrated near the horizontal joints. For the SRCSWIs, the precast exterior concrete panel contributed little to the stiffness and carrying capacity of the walls. For the SRCSWI specimens, SRCSW specimen and CRCSW specimen with the same design axial load ratio, the stiffness, ductility and carrying capacity were basically consistent. For the SRCSWI specimen with a lower axial force, the carrying capacity was lower, but the ductility ratio and energy dissipation coefficient were higher than those of the other specimens. Finally, solid finite element (FE) models of the test specimens were established in ABAQUS and validated with the experimental results. The distribution of concrete damage, steel reinforcement stress distribution and hysteretic curves in the numerical analysis were basically consistent with the test results.



中文翻译:

隔热叠合钢筋混凝土剪力墙抗震性能的试验与数值研究。

通过将隔热板集成到预制混凝土外墙板中,以实现承重和隔热性能,本文提出了一种新型的带隔热层的叠合钢筋混凝土剪力墙(SRCSWI)。设计了四个全尺寸标本,包括一个现浇钢筋混凝土剪力墙(CRCSW),两个SRCSWI和一个不带绝缘层的叠加钢筋混凝土剪力墙(SRCSW),用于拟静力试验。测试结果表明,SRCSWI的失效模式与CRCSW和SRCSW相似。对于边界元素的配筋率较低的SRCSWI,墙中出现的裂缝较少,而水平缝中的裂缝的开口宽度相对较大,这意味着该样品的塑性变形集中在水平接缝附近。对于SRCSWI,预制的外部混凝土面板对墙的刚度和承载力的贡献很小。对于设计轴向载荷比相同的SRCSWI试样,SRCSW试样和CRCSW试样,其刚度,延性和承载能力基本一致。对于轴向力较小的SRCSWI试样,其承载能力较低,但延性比和能量耗散系数均高于其他试样。最后,在ABAQUS中建立了试样的实体有限元(FE)模型,并用实验结果进行了验证。混凝土破坏的分布,

更新日期:2021-05-02
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