Compressive Testing of H-Shaped Steel Stub Columns Fabricated with Grade 800MPa High Performance Steel

2013 ◽  
Vol 671-674 ◽  
pp. 646-649
Author(s):  
Kang Min Lee ◽  
Myung Jae Lee ◽  
Young Suk Oh ◽  
T.S. Kim ◽  
Do Hwan Kim
Keyword(s):  
High Performance ◽  
High Strength ◽  
Structural Members ◽  
Basic Study ◽  
High Rise ◽  
Long Span ◽  
Compressive Testing ◽  
High Performance Steel ◽  
Stub Column ◽  
Structural Behaviors

With the increased demand for high-rise and long-span structures, high strength with high performance steels have been utilized for these kind of structures. For the grade 800MPa high performance steel, although it was included in Korean Standard as high strength steel(HSA 800), however the HSA 800 steel was excluded in Korean Building Code-Structures due to the rack of research results for the structural behaviors of members fabricated with HSA 800 steel. Therefore, this paper describes basic study for the design specification of structural members using HSA 800 high performance steel. For this purpose, welded H-shaped stub column specimens with various width-to-thickness ratios were designed and tested in order to investigate the buckling behaviors and ultimate compressive strength.

Local Buckling Behaviors of Built-Up Box Columns Fabricated with High-Performance Steel under Concentric Axial Loading

2013 ◽  
Vol 671-674 ◽  
pp. 709-712
Author(s):  
Jung Han Yoo ◽  
Kang Min Lee ◽  
Joo Woo Kim ◽  
Jae Keun Yang ◽  
Joo Won Kang
Keyword(s):  
High Performance ◽  
Local Buckling ◽  
Axial Loading ◽  
Building Structures ◽  
Basic Study ◽  
Element Analysis ◽  
Long Span ◽  
Steel Material ◽  
High Performance Steel ◽  
Stub Columns

Recently, high-performance steel has been increasingly used for structural materials in buildings and bridges with the demand for high-rise and long-span of main structures. This paper is a series of basic study for the design specification of structural members using high performance steel, material properties of HAS800(High-performance rolled Steel for building structures). HSA800 was compared with the requirements of Korean Standards(KS). Built-up box stub columns with variables of width-to-thickness ratios are planned in order to investigate the local buckling behaviors and check the current design limit of width-to-thickness ratio. In addition, the buckling behaviors of stub columns obtained finite element analysis were compared with those of test results.

Basic Study of PK Fiber Tire Cord3

2007 ◽  
Vol 35 (4) ◽  
pp. 317-325 ◽  
Author(s):  
Yugo Zuigyo ◽  
Masahiko Yamamoto
Keyword(s):  
High Performance ◽  
High Strength ◽  
Laboratory Evaluation ◽  
High Modulus ◽  
Tire Cord ◽  
Basic Study ◽  
Performance Requirements ◽  
Simple Processing ◽  
Long Time ◽  
Excellent Adhesion

Abstract Rayon, nylon, and polyester have been used for a long time as general tire reinforcements. Recently application of p-aramid fiber, which has high tenacity and high modulus properties, is gradually increasing in order to satisfy high-performance requirements, large tires, and tire weight reduction. However, in working with high-strength and high-modulus fibers such as p-aramid it is normally difficult to obtain excellent adhesion with simple processing methods and their fatigue resistances are not good. This time we have focused on a new high-tenacity and high-modulus “polyketone” fiber obtained by gel-spun technology and performed a basic study in tire cord application. Through laboratory evaluation, we have confirmed that polyketone cord fiber has excellent adhesion, comparable with rayon and nylon, and good fatigue resistance in comparison with rayon. In addition, through its tire evaluation as a body-ply cord and cap-ply cord for PCR tires, we have confirmed its performance advantage in comparison to current tire cords.

Technology of Ultra-High Strength / High Performance Concrete Applied to Guangzhou Xita Tower Construction

2009 ◽  
Vol 405-406 ◽  
pp. 1-4 ◽  
Author(s):  
Hao Wen Ye
Keyword(s):  
High Performance ◽  
High Performance Concrete ◽  
Autogenous Shrinkage ◽  
High Strength ◽  
Hardened Concrete ◽  
High Rise ◽  
Slump Flow ◽  
Mix Proportion ◽  
New City ◽  
Pumping Equipment

This paper introduces development and application of ultra-high strength/high performance concrete in construction of the Xita tower high-rise building at Zhujiang New City of Guangzhou, China. The goal of the concrete construction in the Xita Tower project will be realized via research of mix proportion and optimization of pumping equipment. In regard to mix proportion of concrete, low water/cement (W/C) ratio, low water content lower than 150 kg/m3 and employment of superplasticizer are essential to acquire high strength. A series of parameters have been measured to research workability of concrete from C70 to C90, such slump, slump flow, flow time from inverted cone, L-box flow, and bleeding under pressure et al. Properties of hardened concrete should also be considered, including durability, autogenous shrinkage caused cracking, and fire resistance.

scholarly journals State of the Art: Mechanical Properties of Ultra-High Performance Concrete

2017 ◽  
Vol 3 (3) ◽  
pp. 190-198 ◽  
Author(s):  
Mohamadtaqi Baqersad ◽  
Ehsan Amir Sayyafi ◽  
Hamid Mortazavi Bak
Keyword(s):  
Mechanical Properties ◽  
High Performance ◽  
High Performance Concrete ◽  
State Of The Art ◽  
High Strength ◽  
Structural Members ◽  
Ultra High Performance Concrete ◽  
Conventional Concrete ◽  
The Past ◽  
Very High

During the past decades, there has been an extensive attention in using Ultra-High Performance Concrete (UHPC) in the buildings and infrastructures construction. Due to that, defining comprehensive mechanical properties of UHPC required to design structural members is worthwhile. The main difference of UHPC with the conventional concrete is the very high strength of UHPC, resulting designing elements with less weight and smaller sizes.  However, there have been no globally accepted UHPC properties to be implemented in the designing process. Therefore, in the current study, the UHPC mechanical properties such as compressive and tensile strength, modulus of elasticity and development length for designing purposes are provided based on the reviewed literature. According to that, the best-recommended properties of UHPC that can be used in designing of UHPC members are summarized. Finally, different topics for future works and researches on UHPC’s mechanical properties are suggested.

Economic Feasibility of Long Span Cable Bridges with Application of High Performance Steel and Wire

2012 ◽  
Vol 18 (9) ◽  
pp. 1421-1428
Author(s):  
Hee Sung Kim ◽  
Joon Sang Ko ◽  
Dong Ho Yoo ◽  
Soo Chang Kang ◽  
Jong Kwan Lee
Keyword(s):  
High Performance ◽  
Economic Feasibility ◽  
Long Span ◽  
High Performance Steel

A Study on the Development of Slip Form System With Lightweight GFRP Panel

2013 ◽  
Author(s):  
Hyejin Yoon ◽  
Won Jong Chin ◽  
Hee Seok Kim ◽  
Young Jin Kim
Keyword(s):  
High Performance ◽  
High Strength ◽  
Suspension Bridges ◽  
Long Span Bridges ◽  
Long Span ◽  
Management Technology ◽  
Early Strength ◽  
Near Future ◽  
Form System ◽  
Design And Construction

Nowadays, many countries are competing in the erection of long-span bridges with main span longer than 2,000 m owing to the tremendous innovations realized in the domain of high performance and high strength materials as well as in the design and construction technologies. The near future will see a boom in the market of suspension bridges with main span longer than 3,000 m. Since three-dimensionally shaped high concrete pylons would be unavoidably required to construct these super long-span bridges, need is to develop advanced slip form systems for their erection. This paper presents the development of a slip form system applying lightweight GFRP panel. Improved slip form management technology is secured by introducing a slip-up technique using GPS-based verticality control and wireless early strength estimation. A mock-up test is conducted by designing and fabricating the slip form system based on the developed techniques.

Application of High-Performance Concrete to High-Rise Building in Taiwan

2001 ◽  
Vol 4 (2) ◽  
pp. 65-73 ◽  
Author(s):  
Ping-Kun Chang ◽  
Chao-Lung Hwang ◽  
Yaw-Nan Peng
Keyword(s):  
Fly Ash ◽  
High Performance ◽  
High Performance Concrete ◽  
Cement Content ◽  
Flow Characteristics ◽  
High Strength ◽  
Design Strength ◽  
Design Algorithm ◽  
High Rise ◽  
One Year

The research and development of high-performance concrete (HPC) that can give both high flow characteristics and high strength have attracted wide interest in Taiwan. The construction of the 101-storey Taipei Financial Center and the 85-storey Tungtxt & Chingtai (T&C) Tower requires the slump to be in the range of 230 – 270 mm, the initial slump flow in the range of 580 – 620 mm and slump more than 230 mm after 45 minutes, as well as a 56-day compressive strength of over 56 MPa. The HPC mix is designed using a densified mixture design algorithm which aims to achieve the lowest cement content. With the addition of pozzolanic materials such as fly ash, the workability is much improved because the shape of fly ash is spherical. After one-year of strict quality control, the HPC achieve consistent workability and excellent strength. This indicates that the appropriate use of local industrial by-product materials can produce HPC of the required design strength.

Research on Preparation Technique of C100 Ultra-High Performance Self-Compaction Concrete

2013 ◽  
Vol 716 ◽  
pp. 30-35
Author(s):  
Li Bin Xu ◽  
Nai Qian Feng ◽  
Ch'ng Guan Bee
Keyword(s):  
High Performance ◽  
High Strength ◽  
Low Noise ◽  
Pearl River ◽  
Preparation Technique ◽  
The West ◽  
New Town ◽  
High Rise ◽  
Pass Through ◽  
Under Construction

Self-compaction concrete is a new green concrete featuring self-leveling, self-compaction, low noise and low consumption of labor force. Nowadays, a large number of super high-rise buildings (h>400m) are under construction around the world, the complicated structures and dense reinforcement placement has brought numerous inconveniences to construction of concrete. Research on high strength / ultra-high strength self-compaction concrete thus becomes a hotspot. The porous structure of zeolite powder can help absorb the water reducing agent and then release it slowly in concrete mixture. With the low slump loss it produces, the prepared C100UHP-SCC can resist slump loss for over 3 hours. Test of super-high pumping at a height of 411m is carried out in the West Tower program at Pearl River New Town of Guangzhou (the building height is 441m). Drilled core test for L-shaped component indicates a dense internal structure, so it has a desirable self-compaction and capacity to pass through dense reinforcement.

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