scholarly journals Numerical investigation of internal force transfer mechanism in push-out tests

2013 ◽  
Vol 52 ◽  
pp. 140-152 ◽  
Author(s):  
Samy Guezouli ◽  
Alain Lachal ◽  
Quang-Huy Nguyen
Keyword(s):  
Numerical Investigation ◽  
Internal Force ◽  
Transfer Mechanism ◽  
Force Transfer ◽  
Force Transfer Mechanism ◽  
Push Out

scholarly journals Internal Force Transfer Mechanism and Bearing Capacity of Vertical Stiffener Joints in CFDST Structures

2019 ◽  
Vol 2019 ◽  
pp. 1-12 ◽  
Author(s):  
Yufen Zhang ◽  
Dongfang Zhang ◽  
Krushar Demoha
Keyword(s):  
Plastic Hinge ◽  
Ductile Failure ◽  
Theoretical Models ◽  
Internal Force ◽  
Transfer Mechanism ◽  
Analytical Models ◽  
Force Transfer ◽  
Bending Resistance ◽  
Vertical Stiffener ◽  
Force Transfer Mechanism

This paper firstly studied the internal force transfer mechanism of vertical stiffener joints in concrete-filled double steel tubular (CFDST) frame structures on the basis of finite element modeling (FEM). Analytical models of shear force and bending moment were established through the appropriate material constitutive equations and equilibrium theory. Then, the proposed models were used to predict and evaluate the shear and bending resistance of the vertical stiffener joint. Six joint specimens were tested to verify the rationality of the theoretical models, and the design suggestions for construction were subsequently discussed. The analysis indicated that the vertical stiffener together with the anchorage web played a dominated role in the internal force transfer mechanism. The computed bending resistance obtained by the tension model agreed well with the measured experimental data, and the shear resistance in the panel zone was sufficient to guarantee the ductile failure in the test. The vertical stiffener determined the plastic hinge so as to ensure the strong connection between the CFDST column and the steel beam. The ribbed anchorage web was an effective way of increasing the shear and bending resistance.

scholarly journals Discrete Element Analysis of the Load Transfer Mechanism of Geogrid-Ballast Interface under Pull-Out Load

2020 ◽  
Vol 2020 ◽  
pp. 1-12
Author(s):  
Jing Li ◽  
Ya-Fei Jia ◽  
Chen-Xi Miao ◽  
Ming-Xing Xie
Keyword(s):  
Load Transfer ◽  
Particle System ◽  
Internal Force ◽  
Transfer Mechanism ◽  
Contact Forces ◽  
Contact Network ◽  
Element Analysis ◽  
Pull Out ◽  
Force Transfer ◽  
Force Transfer Mechanism

Geogrids have been extensively used in subgrade construction for stabilization purposes of unconfined ballast. Based on well-calibrated microparameters, a series of geogrid-reinforced ballast models with different geogrid sizes and particular structures were developed to reproduce the mechanical behavior of the geogrid under pull-out load in this paper. And the rationality of the DEM model is verified by comparing the evolution law pull-out force measured by laboratory tests and numerical simulations under comparable conditions. Moreover, the macro pull-out force and the internal force distribution of the geogrid were analyzed, and the contact force statistical zones of the particle system were divided accurately according to the results. Meanwhile, both the force transfer mechanism in the geogrid-ballast interface and the sectionalized strain of the geogrid were discussed. And results unveil that the pull-out load is transmitted along the longitudinal ribs to the transverse ribs, and nearly 90% of the load is transmitted to the contact network (in statistical zone 1) in front of the first transverse rib, resulting in strong interlocking between the particles occurs in statistical zone 1. And the second transverse rib is the strength dividing line between strong and weak contact forces. Then, additional pull-out tests on the control groups were conducted, and the sectionalized strain of the geogrid and the peak pull-out force, as well as the energy dissipation were systematically analyzed. In addition, the proposed method used in simulation holds much promise for better understanding of the reinforcement mechanism and further optimizing the performance of geogrid-reinforced structures.

A force transfer mechanism for triggering landslides during rainfall infiltration

2018 ◽  
Vol 15 (11) ◽  
pp. 2480-2491 ◽  
Author(s):  
Gang Liu ◽  
Fu-guo Tong ◽  
Yi-tong Zhao ◽  
Bin Tian
Keyword(s):  
Transfer Mechanism ◽  
Rainfall Infiltration ◽  
Force Transfer ◽  
Force Transfer Mechanism
Sign in / Sign up

Export Citation Format

Share Document