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Research on Out-of-Plane Mechanical Performance of Prefabricated Sandwich Insulated Wall Panels with FRP Plate Connectors
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摘要: 为研究配FRP片状连接件预制夹心保温墙体的平面外抗弯性能及关键设计参数的影响，设计了一个足尺预制混凝土夹心保温墙体试件，开展了单调静力加载试验，并基于ABAQUS平台建立了精细化非线性有限元模型。通过将有限元计算结果与试验数据在破坏形态、荷载-位移曲线及裂缝开展过程等方面进行对比，验证了模型的准确性。在此基础上，进一步对保温层厚度、连接件布置间距及混凝土强度等关键参数进行了分析。研究结果表明：有限元模型可模拟墙体的“X”形屈服线破坏模式及受力过程；保温层厚度的增加会显著削弱墙体刚度，当厚度从100 mm增至200 mm时，承载力下降了约26.4%；连接件布置间距对承载力影响较大，当间距由400 mm增至600 mm时，由于层间组合作用减弱，墙体极限承载力降至219.21 kN，降幅显著；提高混凝土强度可有效提升墙体的承载力与刚度。Abstract: To investigate the out-of-plane flexural behavior and the influence of key design parameters of prefabricated sandwich insulated wall panels incorporating FRP plate connectors， a full-scale specimen was designed and tested under monotonic static loading. A refined nonlinear finite element （FE） model was developed using the ABAQUS platform. The accuracy of the FE model was validated by comparing the failure modes， load-displacement responses， and crack propagation processes with experimental observations. On this basis， a parametric study was conducted to evaluate the effects of insulation layer thickness， connector spacing， and concrete strength on the structural performance. The results indicated that the proposed FE model accurately reproduced the “X”-shaped yield line failure pattern and the overall load-bearing mechanism of the wall panel. Increasing the insulation layer thickness significantly reduced structural stiffness； an increase from 100 mm to 200 mm resulted in a 26.4% decrease in bearing capacity. Connector spacing had a pronounced impact on bearing capacity： as the spacing increased from 400 mm to 600 mm， the composite action between layers weakened substantially， leading to an ultimate bearing capacity reduction to 219.21 kN. Furthermore， increasing the concrete strength effectively improved both the stiffness and bearing capacity.
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