Experimental study on shear mechanical properties of cement mortar specimen with through-step joints under direct shear

• Autorzy: Xiong Liangxiao , Chen Haijun , Guo Haogang , Mei Songhua , Xu Zhongyuan , Liu Bin

Identyfikatory

DOI

10.24425/ace.2022.143025

• Języki publikacji: EN

Abstrakty

EN

In this study, direct shear tests were carried out on cement mortar specimens with single-ladder, single-rectangular, and double-rectangular step joints. Consequently, the shear strength, and crack shape of specimens with these through-step joints were analyzed, for understanding the influence of the through-step joint’s shape on the direct shear mechanical properties. The results of the investigation are as follows: (1) Under the same normal stress, any increases in the height h of the step joint causes an initial-increase-decrease in the shear strengths of specimens with single-ladder and double-rectangular step joints, causing a type-W variation pattern for the specimens with single-rectangular step joint. More essentially, when normal stress and h are constant, the shear strength of specimens with a single-ladder step joint is the greatest, followed by specimens with a double-rectangular step joint, and then specimens with a single-rectangular step joint is the least. (2) Furthermore, given a small h and low normal stress, specimen with a single-ladder step joint mainly experiences shear failure, whereas specimens with single-rectangular and double-rectangular step joints mainly generate extrusion milling in the step joints.

Słowa kluczowe

EN

ladder step joint; rectangular joint; joint height; shear strength; cement mortar

PL

złącze schodkowe; połączenie prostokątne; wysokość złącza; wytrzymałość na ścinanie; zaprawa cementowa

• Wydawca: Komitet Inżynierii Lądowej i Wodnej PAN ; Politechnika Warszawska, Wydział Inżynierii Lądowej
• Czasopismo: Archives of Civil Engineering
• Rocznik: 2022
• Tom: Vol. 68, nr 4
• Strony: 45--61
• Opis fizyczny: Bibliogr. 16 poz., il., tab.

Twórcy

autor

Xiong Liangxiao

• Hunan Provincial Key Laboratory of Hydropower Development Key Technology, Power China Zhongnan Engineering Corporation Limited, Changsha, China

• https://orcid.org/0000-0002-6366-5187

autor

Chen Haijun

• Geotechnical Engineering Department, Nanjing Hydraulic Research Institute, Nanjing, China

• https://orcid.org/0000-0003-0094-9649

autor

Guo Haogang

• Civil and Environmental Engineering Department, Carnegie Mellon University, Pittsburgh, United States

• https://orcid.org/0000-0002-0367-8998

autor

Mei Songhua

• Hunan Provincial Key Laboratory of Hydropower Development Key Technology, Power China Zhongnan Engineering Corporation Limited, China

• https://orcid.org/0000-0002-6122-3967

autor

Xu Zhongyuan

• Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu, China

• https://orcid.org/0000-0003-4303-1870

autor

Liu Bin

• School of Civil Engineering and Architecture, East China Jiaotong University, Nanchang, China

• https://orcid.org/0000-0002-8485-4200

Bibliografia

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