Experiment of the SCT Joint under Complicated Loading

2011 ◽  
Vol 255-260 ◽  
pp. 607-613
Author(s):  
Bing Liao ◽  
Yong Feng Luo ◽  
Xiao Nong Guo
Keyword(s):  
Bearing Capacity ◽  
Loading Condition ◽  
Steel Structure ◽  
Force Transmission ◽  
Load Bearing Capacity ◽  
Load Bearing ◽  
Roof Structure ◽  
Axial Forces ◽  
Out Of Plane ◽  
Water Sports

A radial-circle-lined grid shell, its height changed step by step in the radial direction, is adopted in the roof steel structure of the Citizen Water Sports Center in Jiangyin, China. And the Spatial Crossing Tubular (SCT) joint is used for the connection of pipe members. Because the force transmission in the roof structure is different from the traditional truss structure, a lot of SCT joints are in a complicated loading state. The joint forces include axial forces and in/out-of-plane moments. To investigate the mechanical behavior and the load-bearing capacity of a typical SCT joint in such complicated loading condition, a full size model test of the typical SCT joint is conducted. The test process is summarized in the paper, together with the finite element calculation of the typical SCT joint in test conditions. By comparing the numerical results with the test results, several significant parameters of the connection are investigated, including the stiffness change of the joint, the transmission mechanism of forces, the ultimate load-bearing capacity and the failure mode of the joint. After investigation, several useful suggestions are proposed for the SCT joint design. They are also valuable for the design of similar SCT joints under complicated loading condition.

FINITE ELEMENT ANALYSES ON CORRODED PONY TRUSS BRIDGE FOR REASONABLE MAINTENANCE

2020 ◽  
Vol 7 (2) ◽  
Author(s):  
Risa Fujinaga ◽  
Tatsumasa Kaita ◽  
Ryoko Koyama ◽  
Tsutomu Imai ◽  
Katashi Fujii
Keyword(s):  
Bearing Capacity ◽  
Ultimate Load ◽  
Plane Deformation ◽  
Element Model ◽  
Truss Structures ◽  
Load Bearing Capacity ◽  
Load Bearing ◽  
Out Of Plane ◽  
Pony Truss Bridge ◽  
Truss Bridge

The load bearing capacity of an existing corroded pony truss bridge, which is used for 100 years was estimated from FEM results for whole bridge model. The beam element model is to clarify that the influence of the residual out-of-plane deformation in main truss structures on the load bearing capacity from the viewpoint of whole bridge. Also, shell element model is to clarify that the influence of severe corrosion damages occurred in many structural members on the load bearing capacity as whole bridge. On the other hand, the influence of assumed support conditions in analytical models were discussed from the analytical results of both type of models, because it will be thought that the performance of shoes deteriorates gradually by long in-service period. The ultimate load bearing capacity was estimated by the critical live load magnification. From the analytical results, the residual out-of-plane deformation of main truss structures in this bridge had little influence on the ultimate load bearing capacity. Also, the ultimate load bearing capacity may decrease up to 20% due to aging deterioration of shoes including corrosion damages. In bridge maintenance, it should be paid attention on local severe corrosion damages on the structural member, which may occur higher secondary stress.

Numerical Analysis of Masonry Enhanced by Fiber Reinforced Lime-Based Render

2014 ◽  
Vol 624 ◽  
pp. 246-253
Author(s):  
Michal Přinosil ◽  
Petr Kabele
Keyword(s):  
Numerical Simulations ◽  
Bearing Capacity ◽  
High Performance ◽  
Masonry Wall ◽  
Deformation Capacity ◽  
Fiber Reinforced ◽  
Load Bearing Capacity ◽  
Load Bearing ◽  
Out Of Plane ◽  
Brittle Fiber

Out of plane load bearing capacity of a masonry structure enhanced by surface render made of high performance lime-based mortar is investigated by numerical simulations using the finite element method (FEM). The response of the wall is simulated firstly without render (as a reference) then with surface render consisting of conventional lime mortar with increased tensile strength (by addition of the metakaolin) without fibers and finally with the proposed lime-metakaolin mortar reinforced with PVA fibers. The thickness of the surface render is considered in two configurations (20 mm and 40 mm). Material parameters of masonry units (bricks), joints (mortar between bricks) and conventional plain render are chosen with regard to investigations of historic structures (reported in the literature), material characteristics of fiber reinforced render are evaluated based on experiments or numerical simulations of these experiments. Using these parameters and characteristics, the numerical simulations of masonry wall subjected to out of plane bending are performed. The results allow us to identify influence of the thickness and the material of render on load-bearing and deformation capacity, failure mode and amount and width of cracks. The results show that the conventional plain mortar improves load-bearing capacity and deformation capacity proportionately to the thickness of render, but the response remains brittle. Fiber reinforced mortar significantly increases the deformation capacity and load-bearing capacity and the amount of absorbed energy is significantly improved.

Experimental Study of Twin Round Bamboo Concrete Infill Parabolic Tied Arch

2012 ◽  
Vol 517 ◽  
pp. 208-212 ◽  
Author(s):  
Smita Chugh ◽  
Anurag Kandya ◽  
Korde Chaaruchandra ◽  
P. Sudhakar
Keyword(s):  
Experimental Study ◽  
Experimental Investigation ◽  
Bearing Capacity ◽  
Affordable Housing ◽  
Loading Condition ◽  
Structural Strength ◽  
Structural Element ◽  
Load Bearing Capacity ◽  
Load Bearing ◽  
Small Thickness

This paper is concerned about the experimental study of twin round bamboo concrete infill composite parabolic tied arch. Experimental investigation is undertaken to validate the structural load bearing capacity of haritha infill arch. The infill arch is tested under three types of loading condition viz a) crown point loading, b) centre half loading and c) distributed point loading. The experimental results brings out the stiffness of the arch to be 1 kN/mm under crown point loading, 1.67 kN/mm under centre half loading and 1.17 kN/mm under distributed loading. The stresses in the materials are well within their allowable limits. Thus this paper is able to successfully report the structural strength of parabolic tied infill arch which promises to be a structural load bearing element. Since, there is no additional formwork required in casting of the arch, apart from the bamboo which itself acts like the formwork, lesser quantity of steel and very small thickness of concrete being involved, the arch qualifies to be a potential structural element for affordable housing and green constructions.

On the assessment of the load-bearing capacity of Z-pinned composite T-joint under out-of-plane tension

2017 ◽  
Vol 36 (22) ◽  
pp. 1639-1650 ◽  
Author(s):  
Dajun Huan ◽  
Yong Li ◽  
Yan Tan ◽  
Xiangyang Zhang ◽  
Jun Xiao
Keyword(s):  
Bearing Capacity ◽  
Load Bearing Capacity ◽  
Load Bearing ◽  
Out Of Plane

scholarly journals Damages during February, 6–24 2017 Çanakkale earthquake swarm

2017 ◽  
Author(s):  
Ramazan Livaoğlu ◽  
Mehmet Ömer Timurağaoğlu ◽  
Cavit Serhatoğlu Serhatoğlu ◽  
Sami Döven
Keyword(s):  
Bearing Capacity ◽  
Rural Area ◽  
Earthquake Swarm ◽  
Structural Features ◽  
Load Bearing Capacity ◽  
Load Bearing ◽  
Mortar Strength ◽  
Out Of Plane ◽  
Connection Type ◽  
Construction Practice

Abstract. On February 6, 2017 a swarm of earthquakes began at the western end of the Turkey. This has been the first recorded swarm at Çanakkale region since continuous seismic monitoring began in 1970. The number of located earthquakes increased during the next ten days. This paper describes the output of a survey carried out in the earthquake prone towns of Ayvacık, Çanakkale, Turkey, in February 2017 after the earthquakes. Observations collected on site regard traditional buildings at the rural area of Ayvacık. A description of the main structural features and their effects on the most frequently viewed damage modes are related in plane, out of plane behavior of the wall regarding construction practice, connection type etc. It was found that there were no convenient connection details like cavity-ties or sufficient mortar strength resulting in decreased and/or lack of lateral load bearing capacity of the wall.

Analyses of Temperature Loads’ and Support Settlements’ Effect on Load Bearing Capacity of Arch-Reticulated Shell Hybrid Steel Structure of Beijing Jiangtai Winter Garden

2011 ◽  
Vol 243-249 ◽  
pp. 879-884
Author(s):  
Xiao Ping He ◽  
Yang Gao ◽  
Yong Jiu Shi ◽  
Yuan Qing Wang ◽  
Kai Lu
Keyword(s):  
Bearing Capacity ◽  
Steel Structure ◽  
Hybrid Structure ◽  
Load Bearing Capacity ◽  
Curtain Wall ◽  
Load Bearing ◽  
Steel Columns ◽  
Glass Curtain Wall ◽  
Comparative Results ◽  
Temperature Loads

To large span spatial structures, the displacements and internal forces caused by temperature loads and support settlements cannot be ignored. Beijing Jiangtai winter garden mainly consists of reticulated shell and glass curtain wall. The reticulated shell is composed of 9 spatial arches and other common frames, thus it can be seen as arch-reticulated shell hybrid structure. The two ends of the arches are supported at the top of steel columns and concrete walls separately. The glass curtain wall is fixed to vertical cables. This paper chose eight load cases including temperature loads and support settlements, and used ANSYS to analyze static responses of the structure under such load combinations. The comparative results showed that temperature loads had more effect on the structure’s load bearing capacity than support settlements. And the superiority of hybrid structures was fully embodied in the conclusions of this paper.

Increased load bearing capacity of mechanically joined FRP/metal joints using a pin structured auxiliary joining element

2020 ◽  
Vol 62 (1) ◽  
pp. 55-60
Author(s):  
Per Heyser ◽  
Vadim Sartisson ◽  
Gerson Meschut ◽  
Marcel Droß ◽  
Klaus Dröder
Keyword(s):  
Bearing Capacity ◽  
Load Bearing Capacity ◽  
Load Bearing

Load-Bearing Capacity of Direct Inlay-Retained Fibre-reinforced Composite Fixed Partial Dentures with Different Cross-Sectional Pontic Design

2017 ◽  
Vol 68 (1) ◽  
pp. 94-100
Author(s):  
Oana Tanculescu ◽  
Adrian Doloca ◽  
Raluca Maria Vieriu ◽  
Florentina Mocanu ◽  
Gabriela Ifteni ◽  
...  
Keyword(s):  
Bearing Capacity ◽  
Fracture Pattern ◽  
Load Bearing Capacity ◽  
Cross Sectional ◽  
Load Bearing ◽  
Reinforced Composite ◽  
Polyethylene Fibre

The load-bearing capacity and fracture pattern of direct inlay-retained FRC FDPs with two different cross-sectional designs of the ponticwere tested. The aim of the study was to evaluate a new fibre disposition. Two types of composites, Filtek Bulk Fill Posterior Restorative and Filtek Z250 (3M/ESPE, St. Paul, MN, USA), and one braided polyethylene fibre, Construct (Kerr, USA) were used. The results of the study suggested that the new tested disposition of the fibres prevented in some extend the delamination of the composite on buccal and facial sides of the pontic and increased the load-bearing capacity of the bridges.

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