Numerical simulation of weld fracture using cohesive interface for novel inter-module connections

Peng，Jiahao1; Hou，Chao2; Shen，Luming1

2020-11-01

10.1016/j.jcsr.2020.106302

JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH   影响因子和分区

0143-974X

1873-5983

Modular construction is an emerging building technique with inherent advantages such as faster construction speed, lower cost and environmental impact. However, it is of great challenge to design higher-rise modular buildings. The key element is to design a feasible inter-module connection that withstands excessive wind, seismic, and gravitational load. In this study, a novel tenon-connected inter-module connection is investigated through advanced numerical approach. Although the connection design minimises on-site activities as a simple bolting procedure, there are still manufactured weld joints that exist in the connection. As revealed by previous experimental studies, fracture of the weld joints is one of governing factors for the connection behaviour. In this paper, the weld fracture is simulated by using an innovative numerical approach that incorporates a cohesive interface model. The advantages of this cohesive interface model are threefold: firstly, it requires only two parameters, namely, the cohesive strength (T) and the critical separation (δ); secondly, it could be applied for both ductile and brittle fracture; thirdly, it is much less computationally demanding as compared with other sophisticated models. A calibration method for ratios T/f and δ/ε is proposed and validated using a standard compact tension test before modelling the inter-module connection. In the full range study of the novel connection, failure mechanisms are successfully simulated, including gap opening, column extrusion, and weld fracture. After validation of the connection model against existing test data, a parametric study is conducted to facilitate the optimal design of the inter-module connections.

Finite element model Fracture Inter-module connection Plug-in device Weld joint

SCI ; EI

英语

通讯

Construction & Building Technology ; Engineering

Construction & Building Technology ; Engineering, Civil

WOS:000579832000021

ELSEVIER SCI LTD

20203609130454

Environmental impact ; Finite element method ; Tensile strength ; Modular construction ; Seismic design ; Fracture ; Tensile testing

Construction Methods:405.2 ; Structural Design:408 ; Environmental Impact and Protection:454.2 ; Earthquake Resistance:484.3 ; Welding:538.2 ; Numerical Methods:921.6 ; Materials Science:951

ENGINEERING

2-s2.0-85090054263

Scopus

1.School of Civil Engineering,The University of Sydney,Sydney,2006,Australia
2.Department of Ocean Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China

Peng，Jiahao,Hou，Chao,Shen，Luming. Numerical simulation of weld fracture using cohesive interface for novel inter-module connections[J]. JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH,2020,174.

Peng，Jiahao,Hou，Chao,&Shen，Luming.(2020).Numerical simulation of weld fracture using cohesive interface for novel inter-module connections.JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH,174.

Peng，Jiahao,et al."Numerical simulation of weld fracture using cohesive interface for novel inter-module connections".JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH 174(2020).