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Elastic-plastic large deformation finite element is used to study the behavior of the square tubular T- joints by ANSYS software. the influence of the parameters including the position, the number, the thickness, the size of the hole of the internal stiffener and the non-dimension parameters on the joint's strength were studied, stress distribution, plastic-zone development, failure mode and ultimate...
The mechanistic analysis presented in this paper is only a beginning of new approach for understanding the real joint load transfer capability on airport and highway concrete pavements. It gives up the two major assumptions those have been popularly adopted by hundreds of published papers: the load is transferred under a wheel with zero speed and with fixed position. The real load transfer in field...
Numerous connections brittle fracture happened in the Wenchuan Sichuan earthquake, which indicates that cognitions on the damage mechanism of beam to column connection are rather inadequate. It need to improve in constitution, there are four kinds of connections are analyzed by the finite element. Under the repeat load, which seismic behavior of improved connections are better and can satisfy the...
This paper mainly discuss the effects on the transverse load distribution of the stiffness and the space of virtual beam, and the value of moment releasing, according to the space beams finite element model of a hinged joint cellular slab bridge on the basis of the Beam Girder Theory. The methods in exact simulating the transverse load distribution of simply-supported hinged joint celluar slab bridge...
First, we introduce the iterative method of the modified elastic compensation method (KtECM) proposed by the authors for plastic limit load analysis of structures containing flaws. Then, plastic limit load of tee joint containing corner cracks under internal pressure is computed by using the KtECM and the elastic-plastic analysis method (EPAM). During computations, we adopt both 3-D tee joint geometry...
The combination of ANSYS and ADAMS can improve the precision of system simulation. In this paper, first, a cable-stayed space truss, consisting of stay cables, columns, and the space truss, is built in ANSYS. Second, the modal neutral file (mnf) needed in ADAMS is generated by executing the macro command “ADAMS” and then imported into ADAMS software. Third, the flexible body in the mnf file is connected...
The deformation of a TVM's body frame was calculated and the structural FEA (Finite Element Analysis) was accomplished in this paper. The geometric model and finite element model of TVM (Ticket Vending Machine) were built. To locate the maximum stress and displacement precisely, structural analysis of the TVM's body frame under its gravity was analyzed by FEA software. The results indicate that the...
The structural behaviors of a sub-truss, typically used in a steel staggered-truss framing system (SSTFS), under fire conditions was studied comparatively using the finite element method with the solid element and beam element respectively. Both the internal force of structural members and the mechanical response behavior of joints at elevated temperature were investigated. And the reasonable computational...
This paper presents a novel 3-DOF precision positioning stage for nanoimprint lithograph (NIL). Due to the advantages such as high positioning accuracy, dexterity, low inertial, and balanced mechanical structure, a piezo-driven flexure-based parallel mechanism is utilized. Based on Pseudo-Rigid-Body modelling theory, the kinematics of the stage is developed by simplifying the single-axis flexure hinges...
Finite element method and analytic method are used to safety evaluation of a penstock laid on downstream surface of dam and its expansion pipe on the following issues: (i) Concrete cracking zone, maximum crack width and stress in liner and bars are calculated and analyzed with allowable value; (ii) Relative displacement at both sides of the joint between dam and power station, and stress of expansion...
In order to study damage of ancient buildings by the Wenchuan earthquake in China on 12th ,may 2008, we took Da-Xiong Palace which is 189 km far away from the epicenter as an example for analysis. Columns of the palace inclined very much by the earthquake. We used time-history method to simulate response of the palace to find out the main reason for the large inclination. According to characters of...
This paper introduces an approach based on artificial embryogeny for truss design to address the problem of finding the best truss structure for a given loading. In this setup, the basic idea is to optimize the size and length of beams in a truss through the actions of a set of cells that are distributed over the very truss structure. Given information at the mechanical level (beam strain), each cell...
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