论文部分内容阅读
为全面了解设置预应力箍板(PSJ)RC柱抗震性能,进一步研究施加横向预应力构件受力机理,建立PSJ-RC柱有限元模型,以剪跨比、轴压比、预应力度以及箍板用量为主要参数,开展弹塑性数值模拟。分析其破坏形态、承载力和变形能力,并进行不同轴压比、预应力度试件的试验验证。设置PSJ能够有效提高试件抗剪承载力,明显改善试件变形能力,尤其对高轴压比柱抗震性能的提高。增加预应力度能提高试件位移延性,预应力度宜控制在0.3―0.5,低于0.15可能导致箍板参与抗剪和横向约束作用降低,箍板配置参数在0.75―1.0能够最大发挥材料效能。设置PSJ能有效提高RC柱抗震性能,施工工艺简单、可行,可供工程实践参考。
In order to fully understand the seismic behavior of prestressed RCJ columns with prestressed hoop plates (PSJ), the mechanism of applying transverse prestressed members was further studied. The finite element model of PSJ-RC columns was established. The shear span ratio, axial compression ratio, prestressing force and hoop Board dosage as the main parameter to carry out elastoplastic numerical simulation. Analysis of its failure morphology, bearing capacity and deformation capacity, and different axial compression ratio, prestressed strength of the specimen test verification. Setting PSJ can effectively improve the shear bearing capacity of specimens, and significantly improve the deformation capacity of specimens, especially the seismic performance of high axial compression ratio columns. Increasing the prestressing force can increase the specimen’s displacement ductility. The prestressing force should be controlled at 0.3-0.5. If it is lower than 0.15, the hoop plate may be involved in the reduction of shear and lateral restraint. The hoop plate configuration parameters of 0.75-1.0 can maximize the material performance . Set PSJ can effectively improve the RC column seismic performance, construction technology is simple, feasible, for engineering practice reference.