About the author:

1. Henan Urban and Rural Planning and Design Research Institute Co., Ltd., Zhengzhou,Henan 450053, China; 2. School of Civil Engineering, Xi’an University of Architecture and Technology,Xi’an, Shaanxi 710055, China; 3. School of Civil Engineering and Architecture, Xi’an University ofTechnology, Xi’an, Shaanxi 710048, China

Abstract:

To study the mechanical properties of horizontal connecting components in modular assembledconcrete structures, three full⁃scale specimens were subjected to stress performance tests, and theirfailure processes and characteristics were analyzed. The influence of parameters such as bolt arrangementposition and bolt quantity on the bearing capacity, ductility, stiffness and other performance indicators ofthe specimens was explored. Research has shown that the specimens exhibit typical bending shear failuremodes,with high bearing capacity and good deformation ability. Reasonable use of bolt connection canensure the mechanical properties of specimens. As the number of bolts increased from 6 to 10, thebearing capacity of the specimen increased by 9.49%, but the increase in ductility coefficient and initialstiffness of the specimen was relatively small. The arrangement of bolts has a significant impact on theductility coefficient of specimens. The ductility coefficients of PPVCB⁃1 and PPVCB⁃3 specimens withbolts arranged in the mid span increased by 22. 84% and 28.67% respectively compared to the PPVCB⁃2 specimen without bolts arranged in the mid span; In addition, the initial stiffness of the specimen issignificantly affected by the position of the bolt arrangement. The specimen with bolts arranged in the midspan has an initial stiffness increase of 47. 55% and 37. 75% respectively compared to the specimen without bolts arranged in the mid span. The research conclusion can provide reference for the engineeringapplication of modular assembled concrete structures.