Stabilization and Strengthening of Historic Buildings' Stone Masonry Columns

2014 ◽  
Vol 923 ◽  
pp. 93-96 ◽  
Author(s):  
Jiří Witzany ◽  
Radek Zigler
Keyword(s):  
Bearing Capacity ◽  
Failure Mechanism ◽  
Experimental Research ◽  
Stone Columns ◽  
Stone Masonry ◽  
Historic Buildings ◽  
Load Bearing Capacity ◽  
Load Bearing

The experimental research of failure mechanism of stone columns made of coursed masonry of regular sandstone blocks and coursed masonry of irregular (freestone) blocks under concentric compression and the research of the performance of non-reinforced as well as CFRP-reinforced stone columns completed to-date pointed out the necessity of a different approach to the assessment of the load-bearing capacity, or residual load-bearing capacity, of masonry composed of stone blocks.

Experimental Research on Load-Bearing Capacity of Frame Columns with Construction Joint under Low-Cyclic Reversed Loading

2013 ◽  
Vol 351-352 ◽  
pp. 363-366
Author(s):  
Xi Kang Yan ◽  
Cheng Dong ◽  
Pei Chen ◽  
Kang Ma
Keyword(s):  
Bearing Capacity ◽  
Experimental Research ◽  
Load Bearing Capacity ◽  
Load Bearing ◽  
Construction Joint ◽  
Axial Compression Ratio ◽  
The Third ◽  
Simple Processing ◽  
Reversed Loading ◽  
Crack Position

In this paper,in order to study the load-bearing capacity of frame columns with construction joint under low-cyclic reversed loading, nine specimens were made, divided into three groups.Every group had three specimens, the first were made without construction joint, the second had fine processing construction joint, the third had simple processing construction joint. The three groups were loaded in axial compression ratio of 0.23,0.34,0.46 respectively.The results show that the influence of different processing with construction joint to crack position ultimate bearing capacity,skeleton curves.

scholarly journals Investigation of the Effect of Dimensional Characteristics of Stone Column on Load-Bearing Capacity and Consolidation Time

2018 ◽  
Vol 4 (6) ◽  
pp. 1437 ◽  
Author(s):  
Mohammad Reza Mohtasham ◽  
Mahdi Khodaparast
Keyword(s):  
Bearing Capacity ◽  
Clayey Soil ◽  
Stone Columns ◽  
Stone Column ◽  
Rigid Foundation ◽  
Load Bearing Capacity ◽  
Load Bearing ◽  
Soil Subsidence ◽  
Behavioural Model ◽  
Consolidation Time

One of the best methods for rehabilitating loos and soft soils is the application of stone columns. This method enhances the soil properties by increasing its load-bearing capacity, decreasing the soil subsidence, and accelerating the consolidation rate. In the present paper, numerical analysis of a stone column of 10 m in length into a clayey soil using ABAQUS software is presented. The stone column was modelled based on the concept of unit cell, i.e. a single stone column with the surrounding soil. In this respect, material of the stone column was modelled using the elastoplastic behavioural model of Mohr-Coulomb, while Cam Clay behavioural model was used for the surrounding clayey soil. Furthermore, throughout the analyses performed in this study, effects of different parameters (e.g. applied load on rigid foundation, and the stone column length and diameter) on the subsidence and consolidation time of the rigid foundation were examined. The results indicated that, construction of a stone column into clayey soil decreases the subsidence and consolidation time of the soil considerably. In additions, increases in length and diameter of the stone column were found to significantly contribute to reduced subsidence and consolidation time of soil.

Load Bearing Capacity Investigation and Coating Failure Mechanism for Coated Spur Gears

2013 ◽  
Vol 446-447 ◽  
pp. 491-496
Author(s):  
Ji Ling Feng ◽  
Yi Qin
Keyword(s):  
Bearing Capacity ◽  
Failure Mechanism ◽  
Cohesive Zone Model ◽  
Complex Loading ◽  
Spur Gear ◽  
Zone Model ◽  
Spur Gears ◽  
Load Bearing Capacity ◽  
Load Bearing ◽  
42Crmo4 Steel

Spur gears are the most common type of gears for industry, due to its simple structures and low costs of manufacture. Under the complex loading conditions, failures can easily occur in the form of de-bonding, pitting, spalling or crushing of coating structures. Failure may originate from initiation of cracks, and its growth and propagation, however, basic failure mechanism is still not clear. In order to investigate the failure mechanism of coating structure failure for the spur gears, this paper presents some understandings about the coating damage at the teeth flank of a spur gear, based on a novel Finite Element simulation-procedures. This modeling procedure was developed based on several modeling approaches including: parameterized FE modeling, Cohesive-Zone Model and sub-modeling technique. The numerical model of spur gear was based on 42CrMo4 steel with PVD coating deposited as TiN/CrN multilayer structures. It was found that greater load bearing capacity exist for spur gears with the coating of nitride states deposited on 42CrMo4 steel.

Mechanical Behavior of Masonry Specimens Strengthened by Carbon Bundles Subjected to a Splitting Test

2017 ◽  
Vol 747 ◽  
pp. 518-524
Author(s):  
Angelo Di Tommaso ◽  
Susanna Casacci ◽  
Cristina Gentilini
Keyword(s):  
Mechanical Behavior ◽  
Bearing Capacity ◽  
Failure Mechanism ◽  
Initial Crack ◽  
Load Bearing Capacity ◽  
Load Bearing ◽  
Experimental Campaign ◽  
Splitting Test ◽  
Water Based

In this study the results of an experimental campaign that involves masonry specimens subjected to a purposely designed splitting test are presented. The specimens are reinforced in the mortar joints by means of carbon bundles impregnated with a water based resin. Unreinforced specimens are also tested for comparison purposes. Some specimens are characterized by an initial crack obtained artificially by cutting the bricks to highlight the crack arrestor function of the carbon bundles. Results show that the failure mechanism from brittle becomes ductile and a load bearing capacity increment is registered in reinforced specimens.

scholarly journals Energy-active expansion segments of halls with structural covers

2013 ◽  
Vol 12 (2) ◽  
pp. 221-228
Author(s):  
Zbigniew Kowal ◽  
Rafał Piotrowski
Keyword(s):  
Bearing Capacity ◽  
Failure Mechanism ◽  
Large Volume ◽  
Load Bearing Capacity ◽  
Load Bearing

The paper presents the results of developing a concept of economical energy-active expansion segments for large-volume halls, in which: 1) structural coverings were used, 2) thermal impacts on forces and displacements were reduced to conventional values stated in the code [1], 3) load bearing capacity and reliability, greater than those recommended for RC2 class structures, were maintained [2], 4) the static scheme was selected in such a way so that failure-causing thermal impacts would not affect the reliability of the hall expansion segments. The effect was obtained by detaching the beam kinematically admissible failure mechanism from the tilt kinematically admissible failure mechanism of separate energy-active expansion segments of the hall.

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