Study on Lap-Slip Mechanics Model of Steel Bar and ECC
Traditional lap-slip mechanics models have not taken into account the important factor of steel bar spacing,leading to inaccurate predictions of steel bar overlapping performance.To address this,a tensile test considering factors such as steel bar spacing was conducted,and the influence of spacing on overlapping performance was investigated.A mechanical model considering steel bar spacing was developed and validated for accuracy and generalization.The results demonstrate that the proposed model considering steel bar spacing improves accuracy by nearly 50% compared to traditional lap-slip models.For ECC-steel overlapping members,the correlation coefficient between the model and experi-mental results exceeds 0.95.The model shows good generalization,effectively predicting the overla-pping performance of steel bars in high-performance concrete and ordinary concrete,and is suitable for predicting the overlapping performance of reinforced concrete overlapping members.
lap-slip mechanics modellap testparametric analysisfitting formula
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