Test & Research on the Shearing Strength of the Continuous Seams in the Mortar-Less Fabricated Block & Masonry

2015 ◽  
Vol 777 ◽  
pp. 194-200
Author(s):  
Xi Xi He ◽  
Ye Lin
Keyword(s):  
Test Data ◽  
Concrete Block ◽  
Standard Test ◽  
Shear Loading ◽  
Shearing Strength ◽  
Loading Methods

Test & research on the shearing strength of the hollow mortar-less fabricated concrete block & masonry has been done in this article. A proposed formula has been put forward in this article by analyzing the influence of the shear loading methods on the shearing strength using the shearing test data of 27 standard test specimens’ continuous seams divided into 9 groups with 100% concrete infill ratio.

scholarly journals Shear Behavior of Hollow Concrete Block Masonry with Precast Concrete Anti-Shear Blocks

2019 ◽  
Vol 2019 ◽  
pp. 1-10 ◽  
Author(s):  
Xinlei Yang ◽  
Hanchen Wu ◽  
Jianxin Zhang ◽  
Hailiang Wang
Keyword(s):  
Shear Strength ◽  
Precast Concrete ◽  
Ductile Failure ◽  
Concrete Block ◽  
Shear Behavior ◽  
Shear Loading ◽  
Control Group ◽  
Double Shear ◽  
Shear Failures ◽  
Maximum Shear Strength

In order to improve the shear behavior of hollow concrete block masonry, precast concrete anti-shear blocks were proposed to enhance the shear strength of hollow concrete block masonry. Four groups of hollow concrete block masonry triplets with precast concrete anti-shear blocks were tested under shear loading, and their behaviors were compared with a control group. The results show that as the height of precast concrete anti-shear blocks increases, the shear strength of the masonry increases. The maximum shear strength of masonry triplets with precast concrete anti-shear blocks was 234.48 percent higher than that of the control specimens. The shear strength of masonry triplets was mainly determined by the failure of hollow concrete block unit. The majority of specimens exhibited double shear failures; however, these failures showed characteristics of ductile failure to a certain extent. Based on the experimental results, a equation for calculating the shear strength of masonry with precast concrete anti-shear blocks was proposed.

Finite Element Analysis of Horizontal Reinforcement Ratio's Effect on Seismic Performance of Autoclaved Aerated Concrete Block Masonry

2011 ◽  
Vol 413 ◽  
pp. 326-330
Author(s):  
Hui Ge Wu ◽  
Hui Lai Luo ◽  
Jie Gu
Keyword(s):  
Finite Element ◽  
Bearing Capacity ◽  
Seismic Performance ◽  
Concrete Block ◽  
Reinforcement Ratio ◽  
Element Analysis ◽  
Finite Element Software ◽  
Autoclaved Aerated Concrete ◽  
Shearing Strength ◽  
Aerated Concrete

Non-linear analysis of autoclaved aerated concrete (AAC) block masonry composite wall with column has been conducted using finite element software ABAQUS. First, the finite element results were verified with laboratory results of full-scale specimens. Effects of horizontal reinforcement ratio on seismic performance were investigated. The analysis indicates that shearing strength of the wall is affected by the openings greatly. Seismic performance is improved with the increase of horizontal reinforcement ratio. The effect of vertical stress on wall without openings is more than that on wall with openings. Bearing capacity of walls without openings has a linear relationship with the horizontal reinforcement ratio. And bearing capacity of walls with openings is related to the place where the reinforcements are installed as well as the horizontal reinforcement ratio.

Experimental Study on Inner Reinforced Concrete-Block Composite Shaft Lining

2010 ◽  
Vol 163-167 ◽  
pp. 1316-1320
Author(s):  
Hao Liang Jiang ◽  
Ri Hui Liu
Keyword(s):  
Experimental Study ◽  
Reinforced Concrete ◽  
Test Data ◽  
Model Test ◽  
Deformation Characteristic ◽  
Concrete Block ◽  
Vertical Shaft ◽  
Composite Shaft ◽  
Shaft Sinking ◽  
Shaft Lining

Inner reinforced concrete-block composite shaft lining was widely used in vertical shaft sinking by vertical shaft sinking machine (VSM) and freezing shaft. In this paper, the deformation characteristic, failure Patten and the load Bering capacity of inner reinforced concrete-block composite shaft lining are presented ,based on the model test .and the test data are provide for the design and calculation of this kinds of composite shaft lining.

Enhancement of Voltage Profile By Using Static Synchronous Compensator (Statcom) in Power System Networks

2016 ◽  
Vol 8 (02) ◽  
pp. 109-120 ◽  
Author(s):  
Ziaur Rahman ◽  
Amit Tiwari
Keyword(s):  
Power System ◽  
Test Data ◽  
Reactive Power ◽  
Power Transmission ◽  
Standard Test ◽  
Transmission System ◽  
Load Flow ◽  
Voltage Profile ◽  
Static Synchronous Compensator ◽  
Bus System

Voltage profile is one of the concerned issues in power system network studies. The voltage profile decay can be experienced by the system when system is subjected to load increment or disturbances. Unscheduled increment of load variation in a power transmission system has driven the system to be stressful, leading to potential cascading trip on the entire system. and capacitor placement. In this paper we introduced the Static Synchronous Compensator (STATCOM), a shunt connected Flexible AC Transmission System (FACTS) device which is capable to regulate the voltage profile by generating or observing the reactive power. Our objective has been tested with different size and different location of STATCOM on IEEE-4 Bus System and IEEE-9 Bus System by using the Newton-Raphson load flow method in MATLAB environment. In this work, firstly we have analysed IEEE-4 bus system and IEEE-9 bus system under the standard test data and after that analysed IEEE- 4 bus system and IEEE-9 bus system with STATCOM under the standard test data. After that, we have compared all the load flow results and observed the effect of STATCOM on voltage profile The different sizes of STATCOM used in the test systems are 20,40,60,80and 100MVAr.

Development of a New Thermal Insulating Concrete Block by Spent Polystyrene Foam

2010 ◽  
Vol 450 ◽  
pp. 198-201 ◽  
Author(s):  
Li Peng Cai ◽  
Ying Wei Yun ◽  
Ii Young Jang ◽  
Seong Kyum Kim
Keyword(s):  
Raw Materials ◽  
Concrete Block ◽  
Standard Test ◽  
Test Method ◽  
Wall Material ◽  
Polystyrene Foam ◽  
Autoclaved Aerated Concrete ◽  
Thermal Insulating ◽  
Comprehensive Properties ◽  
Aerated Concrete

In this research, a new Thermal Insulating Concrete Block (TICB) is produced via “sandwich” structure by spent polystyrene foam, cement and other raw materials. According to the concerned China Standard Test Method for Building Material, the main properties of this TICB are measured successfully. By comparing its properties with those of autoclaved aerated concrete block as wall material, it can be concluded that comprehensive properties of this concrete block is better than those of autoclaved aerated concrete block. The extrusive advantage of producing this TICB is that large amount of spent polystyrene foam which is hard to be decomposed as industrial waste can be consumed. This is propitious to environmental protection and energy conservation. Therefore, TICB studied in this paper is one kind of green environmental wall material with bright prospect.

Aeroelastic Flutter Analysis of Linear Cascade Blades: STC5

2017 ◽  
Author(s):  
Kirubakaran Purushothaman ◽  
Sankar Kumar Jeyaraman ◽  
Sasikanta Parida ◽  
Kishore Prasad Deshkulkarni
Keyword(s):  
Test Data ◽  
Aerodynamic Force ◽  
Damping Ratio ◽  
Pressure Coefficient ◽  
Axial Compressor ◽  
Sensitivity Study ◽  
Standard Test ◽  
Test Configuration ◽  
Linear Cascade ◽  
Aerodynamic Damping

Study of aerodynamic flow and aeroelastic stability in vibrating blades of cascade is the main objective of this study. Standard test configuration (STC-5) was chosen for this study as it involves transonic flow regime in compressor blade cascades. CFD analysis were carried out for 11 test cases of STC-5 configuration and pressure coefficient values were compared with test data. The range of incidence angles vary from 2° to 10° and reduced frequency varies from 0.14 to 1.02. Inflow Mach number was fixed at 0.5 and Reynolds number was fixed at 1.4 × 106. Analysis of vibrating blades and comparison of test data results of axial compressor with linear cascade stator blades of fifth standard configuration at high subsonic speed is compared with CFD results. While doing this vibration of only the center blade is concerned when all the other blades in the cascade are fixed. Fluid structure interaction approach is used here to evaluate the unsteady aerodynamic force and work done for a vibrating blade in CFD domain. Energy method and work per cycle approach is adapted for aerodynamic damping prediction. A framework has been developed to estimate the work per cycle and aerodynamic damping ratio. Final sensitivity study was carried out to evaluate the influence of blade incidence and frequency on blade damping values.

In-plane tensile strength of concrete masonry

1982 ◽  
Vol 9 (3) ◽  
pp. 413-421 ◽  
Author(s):  
Robert G. Drysdale ◽  
Ahmad A. Hamid
Keyword(s):  
Tensile Strength ◽  
Test Data ◽  
Concrete Block ◽  
Relative Influence ◽  
Concrete Masonry ◽  
Tension Tests ◽  
Test Parameters ◽  
Current Design ◽  
Observed Behaviour ◽  
Important Objective

Splitting tension tests of concrete block masonry specimens were used to investigate the in-plane tensile strength of concrete block masonry. The strength and geometric properties of the blocks and of various strength grouts were included as test parameters. Explanations for the observed behaviour were suggested. In addition to providing test data for evaluating current design provisions for tension produced by combinations of in-plane loads, documentation of the relative influence of grouting is an important objective of this paper. The results indicate inconsistencies with the current design assumption that grouted blockwork is equivalent to construction with solid units. Some general conclusions related to design provisions are provided.

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