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Title |
Performance Evaluation of Joint?Connecting Materials for Horizontal Extension Remodeling of Apartment Buildings
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DOI |
https://doi.org/10.4334/JKCI.2025.37.4.509 |
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Keywords |
비틀림 제어 확장앵커; 수평증축 리모델링; 연결재; 전단강도 torque-controlled expansion anchor; horizontal extension remodeling; connector; shear strength |
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Abstract |
In this work, a mechanical connection method applicable to joints between existing and new structures during horizontal extension remodeling of apartment buildings is proposed. The proposed method comprises a mechanical connection detail that utilizes post-installed expansion anchors and head studs, offering excellent structural performance and constructability compared to existing chemical anchors. To evaluate the structural behavior and performance of the proposed connection detail, a series of material- and component-level experiments was conducted. The validity of the system was verified through pull-out and shear tests on post-installed expansion anchors embedded in existing concrete members. The results showed that the characteristic strengths of all anchors met or exceeded the manufacturer’s standard values, demonstrating adequate structural safety and reliability under both tensile and shear loads. Furthermore, additional pull-out and shear tests were performed on assemblies of wedge anchors and connecting materials under varying reinforcement spacings (120 mm, 130 mm, and 150 mm). In all cases, the characteristic strengths exceeded the nominal tensile and shear strength values specified in the Design Standard for Anchors for Concrete (KDS, 2021), confirming that the proposed connection provides sufficient performance that exceeds the minimum nominal strength required by the standard.
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