scholarly journals STRUCTURE OF REINFORCED SEAWALL AGAINST TSUNAMI － DEVELOPMENT OF NEW TYPE OF PRECAST CONCRETE BLOCK －

2014 ◽  
Vol 29 (0) ◽  
pp. 111-114
Author(s):  
Shinichiro TSUJI ◽  
Naoki TATTA ◽  
Ken WATANABE ◽  
Kenichi MATSUSHIMA ◽  
Osamu TAKECHI
Keyword(s):  
Precast Concrete ◽  
Concrete Block ◽  
New Type

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.

Experimental Study on Behavior of Shear Walls Built with Precast Two-way Hollow Slabs for Different Axial-Load Ratios

2013 ◽  
Vol 351-352 ◽  
pp. 833-837
Author(s):  
Ji Liang Liu ◽  
Hui Chen Cui ◽  
Ming Jin Chu ◽  
Jian Qun Hou
Keyword(s):  
Shear Failure ◽  
Precast Concrete ◽  
Failure Process ◽  
Compressive Load ◽  
Shear Walls ◽  
Shear Wall ◽  
Shear Capacity ◽  
Lateral Loads ◽  
Compression Load ◽  
New Type

The shear wall built with precast two-way hollow slab is an innovated precast concrete shear wall suitable for housing industrialization. Two shear walls built with precast two-way hollow slabs were tested pseudo-statically under low cyclic lateral loads to acquire their failure process and modes. The effect of the axial compression load was investigated. The study proved that vertical cracks along the vertical holes of the new type shear wall have been appeared to avoid brittle shear failure, and the shear wall developed integral section wall to walls-columns combination. As the results, the shear walls have the adequate deformability. The test results showed that with the increase of axial compressive ratio, crack development has been limited and the energy dissipation capacity has been improved. It also can be found that with the increase of the axial compressive load, shear capacity of the new type shear walls have been improved.

Discuss on Precast Concrete Tube Column

2012 ◽  
Vol 204-208 ◽  
pp. 833-837
Author(s):  
Hong Yan Ding ◽  
Chao He ◽  
Pu Yang Zhang
Keyword(s):  
Axial Compression ◽  
Large Scale ◽  
Precast Concrete ◽  
Steel Tube ◽  
Compression Performance ◽  
Finite Element Software ◽  
New Type ◽  
Column Joint ◽  
Good Research

This paper presents a new type of precast concrete tube column which was first put forward by Tianjin University of China. Precast concrete tube column is composited by outer precast concrete tube which is large-scale precast in component factory and inner cast-in-situ concrete. Analysis itself characteristics, comparing with steel tube column and traditional precast component, precast concrete tube column has a good research value. Then new patterns of precast concrete tube column beam-column joint are discussed. Finally the axial compression performance and bias-axial compression performance of precast concrete tube column are simulated by finite element software ABAQUS. The result shows that precast concrete tube column has high bearing capacity. The team of Tianjin University is constantly perfect the research of precast concrete tube column. Soon there would be updated content to be reported.

scholarly journals WAVE RUN-UP OBSERVATIONS ON REVETMENTS WITH DIFFERENT POROSITIES

2012 ◽  
Vol 1 (33) ◽  
pp. 73 ◽  
Author(s):  
Stefan Schimmels ◽  
Michalis Vousdoukas ◽  
Dagmara Wziatek ◽  
Katharina Becker ◽  
Fabian Gier ◽  
...  
Keyword(s):  
Data Analysis ◽  
Concrete Block ◽  
Video Data ◽  
Coastal Protection ◽  
Large Wave ◽  
Wave Flume ◽  
New Type ◽  
Run Up ◽  
Highly Porous ◽  
Good Agreement

Wave run-up plays an important role in the design of coastal protection structures. However, none of the existing formulae for wave run-up predictions explicitly considers the effect of revetment porosity. Recently, two revetments have been tested in the Large Wave Flume (GWK) of Forschungszentrum Küste (FZK), a new type of highly porous polyurethane bonded (PBA revetment) revetment and a smooth interlocked pattern placed concrete block revetment (IPPB revetment), which is considered as “weakly permeable” for the present study. Wave run-up is evaluated by video data analysis based on timestack image processing. The results derived from the timestacks are compared to run-up data measured with conventional wire gauges and the good agreement demonstrates the accuracy and reliability of the video data analysis. The effect of the porosity of the revetment is incorporated into the EuroTop wave run-up formula, showing that for the present case it may reduce the relative run-up heights Ru,2%/Hm0 by about 25 % to 50 % as compared to a smooth impermeable slope.

scholarly journals Experimental Study on Assembled Monolithic Concrete Shear Walls Built with Precast Two-Way Hollow Slabs

2014 ◽  
Vol 8 (1) ◽  
pp. 161-165 ◽  
Author(s):  
Zhijuan Sun ◽  
Yukun Mao ◽  
Jiliang Liu ◽  
Qinyan Zhao ◽  
Mingjin Chu
Keyword(s):  
Shear Failure ◽  
Precast Concrete ◽  
Shear Walls ◽  
Shear Wall ◽  
Shear Capacity ◽  
Property A ◽  
Joint Force ◽  
Vertical Reinforcement ◽  
New Type ◽  
Vertical Joint

Assembled shear wall built with precast two-way hollow slab is a new-typed shear wall built with precast concrete. In order to study its mechanical property, a quasi-static experiment is conducted with 1 reinforced concrete shear wall and 2 new type shear walls as the study objects. It was found that the internal and vertical joints of the wall body were vulnerable parts so that the new-typed shear wall experienced the loading process from the whole wall to the portioned wall. So, brittle shear failure can be avoided, deformability and anti-collapse performance are greatly improved, and shear capacity of wall body is reduced. The new-typed shear wall is reasonably structured, with convenient and reliable horizontal and vertical reinforcement, which leads to satisfactory vertical joint force-bearing capacity. Thus, it can be applied in practical construction.

scholarly journals 2107) Test of a New Type of the Joint of Precast Concrete Panels(Structure)

1964 ◽  
Vol 103 (0) ◽  
pp. 163
Author(s):  
Kazuo Ohno ◽  
Takuji Shibata ◽  
Takashi Arakawa
Keyword(s):  
Precast Concrete ◽  
Concrete Panels ◽  
New Type

STRUCTURAL PERFORMANCE EVALUATION OF NEW-TYPE WAVE DISSIPATING CONCRETE BLOCK

2009 ◽  
Author(s):  
Satoshi Noboru ◽  
Mitsuyasu Iwanami ◽  
Masato Yamamoto ◽  
Ichiro Nishiwaki
Keyword(s):  
Performance Evaluation ◽  
Concrete Block ◽  
Structural Performance ◽  
Type Wave ◽  
New Type

Research on Crack Prevention Technology for Filler Wall of Concrete Block

2013 ◽  
Vol 353-356 ◽  
pp. 2877-2880
Author(s):  
Ding Tang Wang
Keyword(s):  
Material Design ◽  
Concrete Block ◽  
Healthy Development ◽  
New Type ◽  
Block Wall

The concrete block made of cement, gravel and waste residues is a new type of promotion material, but the problem of cracking existed commonly on the block wall affects seriously its use. This paper analyzes the causes of block wall cracking from the aspects of material, design, constructional measures, construction and management etc., and puts forward some corresponding precaution measures. It helps to limit or /and eliminate the block wall cracking, promote the healthy development of block, and provides valuable references for the similar engineering.

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