[논문]Effect of Glass Fiber-Reinforced Connection on the Horizontal Shear Strength of CLT Walls

JUNG, Hongju; SONG, Yojin; HONG, Soonil

doi:10.5658/wood.2020.48.5.685

[국내논문] Effect of Glass Fiber-Reinforced Connection on the Horizontal Shear Strength of CLT Walls 원문보기

목재공학 = Journal of the Korean wood science and technology, v.48 no.5, 2020년, pp.685 - 695

JUNG, Hongju (BRANDHOUSING CO., LTD.) , SONG, Yojin (Department of Forest Biomaterials and Engineering, College of Forest and Environmental Sciences, Kangwon National University) , HONG, Soonil (Department of Forest Biomaterials and Engineering, College of Forest and Environmental Sciences, Kangwon National University)

Abstract ▼ AI-Helper

The connection performance between cross-laminated timber (CLT) walls and support has the greatest effect on the horizontal shear strength. In this study, the horizontal shear performance of CLT walls with reinforced connection systems was evaluated. The reinforcements of metal bracket connections in the CLT connection system was made by attaching glass fiber-based reinforcement to the connection zone of a CLT core lamina. Three types of glass fiber-based reinforcement were used: glass fiber sheet (GS), glass fiber cloth (GT) and fiber cloth plastic (GTS). The horizontal shear strength of the fabricated wall specimens was compared and evaluated through monotonic and cyclic tests. The test results showed that the resistance performance of the reinforced CLT walls to a horizontal load based on a monotonic test did not improve significantly. The residual and yield strengths under the cyclic loading test were 38 and 18% higher, respectively, while the ductility ratio was 38% higher than that of the unreinforced CLT wall. The glass fiber-based reinforcement of the CLT connection showed the possibility of improving the horizontal shear strength performance under a cyclic load, and presented the research direction for the application of real-scale CLT walls.

주제어

표/그림 (12)

그림 Fig. 1. Reinforced CLT connection system with glass fiber-based reinforcements.
그림 Fig. 2. Schematic diagram of the horizontal shear test setup for the CLT wall.
그림 Fig. 3. Cyclic load function applied to the horizontal shear tests of the CLT walls.
그림 Fig. 4. Load-displacement curves of the CLT walls for the monotonic test.
그림 Fig. 5. Failure modes of the uplifted CLT connections under monotonic loading.
표 Table 1. Horizontal Shear Strength Properties of the CLT Walls for Monotonic Loads
그림 Fig. 6. Hysteresis loops of the CLT walls.
그림 Fig. 7. Backbone curves of the CLT walls.
표 Table 2. Strength Degradation at Each Horizontal Displacement
그림 Fig. 8. Comparison of the horizontal shear strength from the monotonic test and the residual horizontal shear strengths after cyclic tests for the CLT walls.
표 Table 3. Horizontal Shear Strength Properties of the CLT Walls for Cyclic Loads
그림 Fig. 9. Failure modes of the CLT connection after a positive load was applied until the connection failed after cyclic test.

AI 본문요약
AI-Helper

* AI 자동 식별 결과로 적합하지 않은 문장이 있을 수 있으니, 이용에 유의하시기 바랍니다.

문제 정의

This study was conducted to improve the horizontal shear strength of CLT walls by reinforcing their connection zone using glass fibers. Below are the conclusions that were arrived at based on the results of the study.
This work was a basic study on the CLT wall system with a reinforced connection lamina for the improvement of horizontal shear strength. Additional research is required for the improvement of the fabrication process and for application to real-scale CLT walls.

제안 방법

Strength degradation (ΔF) refers to a load reduction at a certain displacement-control cyclic loading level (DIN 12512, 2002). In this study, strength degradation was calculated based on the difference between the maximum load of the first cycle and the maximum load of the third cycle in the same displacement section (Eq. 2).
In this study, the horizontal shear strength test was performed on the CLT walls reinforced with glass fiber-based reinforcement to improve the performance of the CLT connection system.
This study also conducted horizontal shear tests for CLT walls with glass fiber-based connection reinforcement under monotonic and cyclic loading.
The CLT walls were fabricated in four types: unreinforced Series-Con and reinforced Series-GS, Series-GT, and Series-GTS (reinforcement volume ratio: 3%). Two specimens were fabricated for each series, one for the monotonic test and one for the cyclic test.

대상 데이터

The fabricated CLTs were cured at room temperature for 3 days, and then processed to the final size of 500 (w) × 1000 (h) × 90 (t) mm, with a 1:2 aspect ratio. The CLT walls were fabricated in four types: unreinforced Series-Con and reinforced Series-GS, Series-GT, and Series-GTS (reinforcement volume ratio: 3%). Two specimens were fabricated for each series, one for the monotonic test and one for the cyclic test.
Self-made brackets were used for the connection the CLT walls with metal frame floors. The metal bracket was made of steel plates that were 5 mm thick, 90mm high and 100mm wide. Two 12 mm high-tensile bolts were used to connect the bracket and the metal frame floor, and 14 3.

이론/모형

The horizontal shear test for CLT walls was performed in accordance with KS F 2154. As shown in Fig.

성능/효과

(2) Under a cyclic load, the maximum strength of the CLT walls reinforced with a glass fiber reinforced plastic sheet decreased by only 7.7% compared to the maximum monotonic load. The result showed a distinct reinforcement effect because not only did the yield strength and ductility ratio increase; the failure mode also improved.
(3) The fabrication process in which the reinforced core lamina made of a heterogeneous material is inserted in the bottom core lamina of CLT walls can cause stiffness degradation in the early loading level when compared to the non-reinforced CLT made of wood. This is due to low composite integration, so further research on the composite properties is required.
The test result confirmed that the support condition had a direct effect on the wall’s cyclic behavior.

후속연구

This work was a basic study on the CLT wall system with a reinforced connection lamina for the improvement of horizontal shear strength. Additional research is required for the improvement of the fabrication process and for application to real-scale CLT walls.
(3) The fabrication process in which the reinforced core lamina made of a heterogeneous material is inserted in the bottom core lamina of CLT walls can cause stiffness degradation in the early loading level when compared to the non-reinforced CLT made of wood. This is due to low composite integration, so further research on the composite properties is required.

참고문헌 (23)

Bogensperger T., Augustin M., Schickhofer G. 2011. Properties of CLT - panels exposed to compression perpendicular to their plane, Proc. Work. Comm. W18 - Timber Struct., Int. Coun. Build. Res. Studies & Doc., Rotterdam, The Netherlands.
Dujic, B., Aicher, S., Zarnic, R. 2006. Racking behavior of light prefabricated cross-laminated massive timber wall diaphragms subjected to horizontal actions. Otto Graf Journal (17): 125-142.
European Committee for Standardization: Timber structures test methods cyclic testing of mechanical connections. DIN EN 12512, 2015.
Hummel, J., Flatscher, G., Seim, W., Schickhofer, G. 2013. CLT wall elements under cyclic loading-details for anchorage and connection. In COST Action FP1004, Focus Solid Timber Solutions-European Conference on Cross Laminated Timber (CLT), pp. 152-165.
Jang, S.S., Lee, H.W. 2019. Lateral resistance of CLT wall panels composed of square timber larch core and plywood cross bands. Journal of the Korean Wood Science and Technology 47(5): 547-556.

원문보기 상세보기
Kim, K.H., Hong, S.I. 2011. Bonding performance of glulam reinforced with textile type of glass- and aramid-fiber, GFRP and CFRP. Journal of the Korean Wood Science and Technology 39(2): 156-162.

원문보기 상세보기
Kitamori, A., Nakashima, S., Isoda, H. 2014. Development of CLT shear frame using metal plate insert connections. In Proceedings of World Conference on Timber Engineering.
Korea Standard Association: Method of shear resistance test for light-frame wood shear walls. KS F 2154, 2006.
Lee, I.H., Song, Y.J., Hong, S.I. 2017. Evaluation of moment resistance of rigid frame with glued joint. Journal of the Korean Wood Science and Technology 45(1): 28-35.
Lee, I.H., Song, Y.J., Hong, S.I. 2017. Evaluation of the moment resistance of reinforced wooden gusset to glulam joint. Journal of the Korean Wood Science and Technology 45(1): 53-61.
Lee, I.H., Song, Y.J., Song, D.B., Hong, S.I. 2019. Results of delamination tests of FRP-and steel-platereinforced larix composite timber. Journal of the Korean Wood Science and Technology 47(5): 655-662.

원문보기 상세보기
Mohammad, M., Gagnon, S., Douglas, B., Podesto, L. 2012. Introduction to cross laminated timber. Wood Design Focus 22(2): 3-12.
Nakashima, S. 2014. Evaluation of structural performance of CLT joint. Bulletin of Research Institute for Sustainable Humanosphere Kyoto University 10: 26-27.

상세보기
Popovski, M., Schneider, J., Schweinsteiger, M. 2010. Lateral load resistance of cross-laminated wood panels. Proceedings of the World Conference on Timber Engineering, Riva del Garda, Italy.
Pozza, L., Scotta, R., Trutalli, D., Pinna, M., Polastri, A., Bertoni, P. 2014. Experimental and numerical analyses of new massive wooden shear-wall systems. Buildings (4): 355-374.
Sanders, S. L. 2011. Behavior of interlocking crosslaminated timber (ICLT) shear walls. Master's Degree Thesis. Department of Civil and Environmental Engineering Brigham Young University. Provo, United States.
Schneider, J., Stiemer, S., Tesfamariam, S., Karacabeyli, E., Popovski, M. 2012. Damage assessment of cross laminated timber connections subjected to simulated earthquake loads. World Conference on Timber Engineering, 15(July), pp. 398-406.
Sheikhtabaghi, M.S. 2015. Continuity connection for cross laminated timber (CLT) floor diaphragms, M.Sc. Thesis University of New Brunswick, Fredericton, Canada.
Smith, I., Asiz, A., Snow, M., Chui, Y.H. 2006. Proposed Canadian / ISO Approach for Deriving Design Values from Test Data. International Council for Research and Innovation in Building and Construction Working Commission W-18 (Timber Structures), Florence, Italy, Aug. 28-31.
Song, Y.J., Hong, S.I. 2016. Evaluation of bonding strength of larch cross-laminated timber. Journal of the Korean Wood Science and Technology 44(4): 607-615.

원문보기 상세보기
Song, Y,J., Lee, I.H., Hong, S.I. 2019. An Evaluation of strength performance of the edge connections between cross-laminated timber panels reinforced with glass fiber reinforced plastic. BioResources 14(4): 7719-7733.
Song, Y.J., Suh, J.S., Park, S.B., Hong, S.I. 2017. Strength performance evaluation of moment resistance for cylindrical-LVL column using GFRP reinforced wooden pin. Wood Research 62(3): 417-426.

상세보기
Tavoussi, K.T., Winter, W., Pixner, T. 2008. Development of earthquake bracing systems for multi-storey buildings using slender shear wall elements in cross laminated timber (CLT). In: WCTE 2008-World Conference on Timber Engineering, Miyazaki, Japan.

표제어: PCR

동의어: Packet Collision Rate

용어 설명 출처 목록 (6)

용어 설명: PCR은 세균 특이성이 있는 primer를 이용하여 적은 수의 세균이 있을지라도 쉽게 검출할 수 있는 유용한 방법이며, 이를 이용하여 구강 내 치면세균막이나 타액에서 직접 세균을 검출할 수 있게 되었다[8].

내보내기 구분	파일저장 인쇄 메일전송
구성항목	기본정보 상세정보 관리번호, 논문명, 저널/프로시딩명, 저자 , 발행년, 권, 호, 시작페이지, 끝페이지, 발행기관 관리번호, 논문명, 대등논문명, 저자 , 저널/프로시딩명, 발행기관, 발행년, 발행언어, 권, 호, 시작페이지, 끝페이지, ISBN, ISSN, 주제분야, 키워드, 초록(한글), 초록(영문), 저자(소속기관)
저장형식	Text(ASCII format) Excel format RefWorks Direct Export RIS format (for Reference Manager, ProCite, EndNote), Scholar's Aids, Mendeley
메일정보	받는사람 (필수) @ 보내는사람 (선택) @ 제목 내용 KISTI 검색결과 이메일 서비스
안내	총 건의 자료가 검색되었습니다. 다운받으실 자료의 인덱스를 입력하세요. (1-10,000) 검색결과의 순서대로 최대 10,000건 까지 다운로드가 가능합니다. 데이타가 많을 경우 속도가 느려질 수 있습니다.(최대 2~3분 소요) 다운로드 파일은 UTF-8 형태로 저장됩니다. 파일의 내용이 제대로 보이지 않을실 때는 웹브라우저 상단의 보기 -> 인코딩 -> 자동선택 여부를 확인하십시오. ~ Text(ASCII format) Excel format

연합인증