Form Factor for the Design of Pultruded FRP Structural Members under Compression

2010 ◽  
Vol 654-656 ◽  
pp. 2648-2651 ◽  
Author(s):  
Jin Woo Choi ◽  
Seung Sik Lee ◽  
Hyung Joong Joo ◽  
Young Jong Sim ◽  
Soon Jong Yoon
Keyword(s):  
Form Factor ◽  
Construction Material ◽  
Construction Materials ◽  
Structural Members ◽  
Fiber Reinforced ◽  
Increasing Trend ◽  
Post Buckling ◽  
New Construction ◽  
Low Modulus ◽  
Steel Design

As a new construction material, fiber reinforced polymeric plastic structural shapes are readily available. Therefore, construction and structure rehabilitation using FRP materials are an ever increasing trend because of FRP material’s superior chemical and mechanical properties compared with those of conventional construction materials such as steel and concrete. Among the FRP materials, pultruded fiber reinforced polymeric plastics are the most popular for civil engineering applications. However, it has relatively low modulus of elasticity and also cross-section of structural shapes is composed of plate components such as flange and web. Therefore, stability is an important issue in the design of pultruded structural shapes. For the design of pultruded structural member under compression, buckling and post-buckling strengths of plate components should be taken into account. In the structural steel design following AISC/ LRFD, this effect, in addition to the buckling strength, is incorporated with a form factor. In this research, the form factor for the design of pultruded structural shapes under compression is investigated. Based on the analytical study, the form factor for the design of pultruded structural shapes have been suggested.

Design Consideration of the Nonuniform Stress Distribution of Pultruded Structural Member under Compression

2011 ◽  
Vol 250-253 ◽  
pp. 3564-3570 ◽  
Author(s):  
Jin Woo Choi ◽  
Seong Sik Lee ◽  
Hyung Joong Joo ◽  
Chang Won Kim ◽  
Dong Min Ok ◽  
...  
Keyword(s):  
Form Factor ◽  
Stress Distribution ◽  
Cross Sections ◽  
Construction Material ◽  
Construction Materials ◽  
Structural Member ◽  
Structural Members ◽  
Fiber Reinforced ◽  
Nonuniform Stress ◽  
New Construction

As a new construction material, fiber reinforced polymeric plastic structural shapes are readily available. Therefore, new construction and existing structure rehabilitation using FRP materials are ever increasing trend because of FRP material’s chemical and mechanical properties compared with those of conventional construction materials such as steel and concrete. Among the structural composites, pultruded fiber reinforced polymeric plastic structural members are the most popular for the civil engineering applications because of the cost effectiveness. However, they are made of fiber reinforced polymer resin system, they have relatively low modulus of elasticity and also cross-sections of structural shapes are composed of thin plate components such as flange and web. Therefore, structural stability is an important issue in the design of pultruded structural members. For the design of pultruded structural member under compression, buckling and post-buckling strengths of plate components may be taken into account. In the structural steel design following AISC/LRFD, in addition to the buckling strength, the nonuniform stress distribution in the section is incorporated with a form factor. In this paper, the form factor for the design of pultruded structural member under compression is investigated by experiment. Based on the experimental results, the form factor for the design of pultruded structural shapes have been suggested.

An Experimental Investigation on the Structural Behavior of FRP-Concrete Composite Compression Members

2010 ◽  
Vol 654-656 ◽  
pp. 2644-2647 ◽  
Author(s):  
Joon Seok Park ◽  
In Kyu Kang ◽  
Jong Hwa Park ◽  
Joo Kyung Park ◽  
Hong Taek Kim ◽  
...  
Keyword(s):  
Civil Engineering ◽  
Construction Material ◽  
Construction Materials ◽  
Fiber Reinforced ◽  
Engineering Structures ◽  
Specific Strength ◽  
Composite Pile ◽  
New Construction ◽  
Frp Tube ◽  
Superior Corrosion Resistance

In construction industries, new construction materials are needed to overcome some problems associated with the use of conventional construction materials due to the change of environmental and social requirements. Accordingly, the requirements to be satisfied in the design of civil engineering structures are diversified. As a new construction material in the civil engineering industries, fiber reinforced polymeric plastic (FRP) has a superior corrosion resistance, high specific strength/stiffness, etc. Therefore, such properties can be used to mitigate the problems associated with the use of conventional construction materials. Nowadays, new types of bridge piers and marine piles are being studied for new construction. They are made of concrete filled fiber reinforced polymeric plastic tubes (CFFT). In this paper, a new type of FRP-concrete composite pile which is composed of reinforced concrete filled FRP tube (RCFFT) is proposed to improve compressive strength as well as flexural strength of an RCFFT. The load carrying capacity of proposed RCFFT is discussed based on the result of experimental and analytical investigations.

An Experimental Study of the Characteristics of Environment-Friendly Construction Materials by Recycling Sewage Sludge Ash

2008 ◽  
Vol 569 ◽  
pp. 297-300
Author(s):  
Jae Ik Lee ◽  
Byung Wan Jo ◽  
Yeong Seok Yoo ◽  
Kyeong Ho Cheon
Keyword(s):  
Sewage Sludge ◽  
Construction Material ◽  
Construction Materials ◽  
Drying Shrinkage ◽  
Environment Friendly ◽  
Sewage Sludge Ash ◽  
New Construction ◽  
Specific Material ◽  
The One ◽  
Sludge Ash

As a basic stage for developing new construction material utilizing sewage sludge ash, this study is identified by specific material characteristics through XRD, SEM, uniaxial compressive strength, porosity, and the drying shrinkage by manufacturing mortar with sewage sludge ash. The average drying shrinkage of sewage sludge ash mortar aged 7 days showed 88% of the strain of the one aged 28 days. The porosity of sewage sludge ash mortar was about 7~10%. The more quick lime and blast furnace slag were added, the less porosity appeared.

scholarly journals Investigation of the effectiveness of new construction materials in road constructions

2019 ◽  
Vol 6 (2) ◽  
Author(s):  
Samofeev Nikita ◽  
Zemfira Gareeva ◽  
Radmir Musin ◽  
Elvira Khasanova ◽  
Rinat Shaikhmetov ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Building Materials ◽  
Polypropylene Fiber ◽  
Construction Materials ◽  
Road Construction ◽  
Fiber Reinforced Concrete ◽  
Fiber Reinforced ◽  
Fibrous Concrete ◽  
New Construction ◽  
The Cost

Modern road constructions go through a whole range of different loads of static and dynamic nature; therefore, higher-quality materials and solutions are required for the roads of the corresponding class, ensuring their compliance with various climatic, geological and economic factors. Currently used road constructions have different basement, they can be of natural or artificial type. Designing a foundation on a concrete base is considered as the most enduring, however, there are a number of aspects that significantly affect their durability. Improving their reliability and quality is an important promising direction in the study of the use of new building materials. The article shows the possibility of improving the quality of the foundations of road structures through the use of poly-reinforced fiber-reinforced concrete. Compared with metal fiber, polypropylene fiber gives the desired effect of reducing the weight of the structure and the cost. There is a significant increase in the waterproof performance of fiber-reinforced concrete, which is especially important for drainage sections of road construction foundations. The authors determined that a significant improvement in the performance of fibrous concrete is achieved, when the polydisperse reinforcement of the concrete matrix use polypropylene (0.3 %) and steel (1.7 %) fiber. In this case, the first option has an impact on crack resistance, and the use of steel – on strength. Thus, with this ratio of reinforcement with various fibers, a synergistic effect of improving the static and dynamic indicators of fibrous concrete is achieved. According to authors, bench studies of reinforcement of fiber-reinforced concrete structures for the foundations of roads show their high economic efficiency and reduce the cost of 1 m3 of the finished structure to 16 %.

scholarly journals The Effectiveness of Sustainable Construction Materials by Using U-Shaped Composite Spacer Block (UCop)​

2019 ◽  
Vol 3 (1) ◽  
pp. 7-10
Author(s):  
Mohamed Saim ◽  
Keyword(s):  
Construction Material ◽  
Market Price ◽  
Construction Materials ◽  
Mechanical Tests ◽  
Sustainable Construction ◽  
Particle Board ◽  
Construction Costs ◽  
Minimum Requirement ◽  
Minimum Standards ◽  
New Construction

Nowadays in construction development, the needs of construction materials that have a unique reinforced concrete design with good quality, reasonable market price, and easy installation techniques has been prioritized. Therefore, this study aimed to produce an alternative new construction material that can fulfill the requirements. The U-shaped composite spacer block (UCop) through the production of Cement Bonded Particle Board (CBPB) as a specimen block was produced from the wood waste of carpentry work combined with Shorea spp. (Seraya red and white) particle size approximately 0.4mm - 2.00 mm. Then it was mixed together with Portland cement by using a ratio 1:2.5. The mixture was then added with Ammonia Chloride (Al2SO4) and Calcium Chloride (CaCl2) act as additives for this product. The physical and mechanical tests were conducted in this study. The results were showed that the thickness expansion was achieved an average of 1.79 %, which was passed the minimum requirement of MS934:1986 standards. However, the flexural strength did not meet the minimum standards. The poor mixing technique was attributed to the results. However, UCop still could contribute as an alternative solution in ease the concrete pouring process using a special binder, giving the spacer block any resistance to formwork of columns or beams is filled with concrete. The high-impact innovations of this product in construction such as it can help the process to be more efficient and to reduce construction costs, next indirectly preserve the nature.

scholarly journals An evaluation of alternative coating material laminated marble in Turkey

2016 ◽  
Vol 8 (2) ◽  
pp. 1053-1062
Author(s):  
Y. Arat
Keyword(s):  
Architectural Design ◽  
Human Life ◽  
Construction Material ◽  
Construction Materials ◽  
Coating Application ◽  
New Construction ◽  
Natural Stones ◽  
Architectural Coating ◽  
And Storage ◽  
Significant Point

The natural stones stand at a significant point of human life from the existence of human-life to present time with their durable and persistent features. They have been used as an important construction material until the recent past. Although the production of marble material is widespread in Turkey, the conversion to the final case marble material is not observed prevalently. The aim of this study, the evaluation of the laminated marble material in terms of being used in architecture and the types of the advantages presented by the material are all listed at the end of the research. The results obtained from the architectural coating application carried out to examine the preferable reasons between marble and laminated marble are thought to have advantages in terms of flawless connection details, easy application, transportation and storage processes in comparison to the marble material for the case of coating surfaces with similar quality. The laminated marble material is more durable by the effect of 9 mm porcelain ceramic at the bottom than the traditional marble plate of 3 mm thickness and is nearly 50% lighter than the marble material having the same thickness and sizes with the laminated marble material that is clear that nearly 50% decrease in transportation costs will be expected. When viewed from this aspect, the new construction materials obtained by reconsidering and re-developing the natural materials in accompany with the innovativetechnological methods will contribute easy and eco-friendly to the architectural design-application projects especially in terms of easy application and utilization.

Physic-Mechanical Properties of Cement Composites Consisting of Organic Raw Materials

2015 ◽  
Vol 1100 ◽  
pp. 7-10 ◽  
Author(s):  
Šárka Keprdová
Keyword(s):  
Raw Materials ◽  
Construction Material ◽  
Construction Materials ◽  
Cement Composites ◽  
Hydraulic Lime ◽  
Environmentally Sustainable ◽  
Filling Materials ◽  
New Construction ◽  
Excellent Work ◽  
Natural Composite

The use of rapidly renewable raw materials in the building industry is seen as very promising with regard not only to the environmental issues but also to its economic aspects. A number of producers, not only in this country, have been trying to replace fine construction materials with secondary raw materials or rapidly renewable ones. As an example, technical hemp is a very promising material due to its good mechanical and thermal insulation characteristics. One of the possibilities is its use as filling component for non-constructional filling materials. Combining binders on the basis of non-hydraulic lime with hemp chaff yields a range of new construction materials. These products offer excellent work characteristics for permanent, environmentally sustainable buildings. These products as a whole form a natural composite construction material that can be used to build insulation walls, floor and roof insulation layers, and to obtain excellent heat and acoustic characteristics of buildings.

Extension of Raw Material Base for Ceramic Building Bricks Production

2017 ◽  
Vol 265 ◽  
pp. 352-358 ◽  
Author(s):  
N.S. Lupandina ◽  
N.Yu. Kiryushina ◽  
E.V. Porozhnyuk
Keyword(s):  
Water Purification ◽  
Raw Materials ◽  
Construction Material ◽  
Construction Materials ◽  
Raw Material ◽  
Material Base ◽  
Optimum Amount ◽  
Production Wastes ◽  
New Construction ◽  
Ceramic Building

The purpose of the paper is to determine the possibility of using water purification slime as a raw material in the production of ceramic building brick. The spectrophotometric, power dispersing, atomic and absorption methods of research and biotesting were used. The possibility of using the water purifying slime as a pore-forming component is proved by the production of ceramsite brick. The optimum amount of the component of water purification slime to the main raw materials has been established. The small level of heavy metals leaching from the received construction material has been experimentally proved. The article can be of interest to the experts in the field of creating new construction materials using the production wastes and sewage purifying.

Research on Static Load Tests of Damaged Bridge Strengthened with Pre-Stressed HFRP

2014 ◽  
Vol 1079-1080 ◽  
pp. 258-265
Author(s):  
Chen Ning Cai ◽  
Shan He ◽  
Li Na Liu ◽  
Shi Kun Ou
Keyword(s):  
Static Load ◽  
Flexural Rigidity ◽  
Fiber Reinforced Polymer ◽  
Test Results ◽  
Structural Members ◽  
Fiber Reinforced ◽  
Hybrid Fiber ◽  
Reinforced Polymer ◽  
Glass Fiber Reinforced ◽  
Load Tests

Thispaper presents an experimental study to strengthen an existing bridge usingpre-stressed carbon fiber reinforced polymer (CFRP) and glass fiber reinforced polymer(GFRP) materials. The method using pre-stressed hybrid fiber reinforced polymer(HFRP) to strengthened structural members is an emerging pre-stressed strengtheningtechnology. In this study, experimental data selected from result of staticloading test conducted to hollow slabs with CFRP/GFRP has been compared with specimenswithout strengthening. Test results showed that the strengthening methoddeveloped in this study could effectively reduce the stress in hollow slab,improving the flexural rigidity and inhibiting the concrete from fracture.

scholarly journals Evaluation of the Possibility of Using 1.4462 and 1.4501 Steel as a Construction Material for Apparatus Operating at an Increased Temperature and with Corrosive Factors

Materials ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 4014
Author(s):  
Karol Prałat ◽  
Andżelika Krupińska ◽  
Marek Ochowiak ◽  
Sylwia Włodarczak ◽  
Magdalena Matuszak ◽  
...  
Keyword(s):  
Construction Material ◽  
Construction Materials ◽  
Optical Microscope ◽  
Passive Layer ◽  
Initial State ◽  
Time Intervals ◽  
Significant Deterioration ◽  
Higher Temperature ◽  
Increasing Temperature ◽  
Steel Heat

The objective of this study was to determine the requirements for steels used as construction materials for chemical apparatus operating at an elevated temperature and to correlate them with the properties of the tested steels. The experimental part examined the influence of the annealing process on the structure and properties of X2CrNiMoN22-5-3 (1.4462) and X2CrNiMoCuWN25-7-4 (1.4501) steel. Heat treatment was carried out on the tested samples at a temperature of 600 °C and 800 °C. Changes were observed after the indicated time intervals of 250 and 500 h. In order to determine the differences between the initial state and after individual annealing stages, metallographic specimens were performed, the structure was analyzed using an optical microscope and the micro-hardness was measured using the Vickers method. Potentiostatic tests of the samples were carried out to assess the influence of thermal process parameters on the electrochemical properties of the passive layer. An increase in the hardness of the samples was observed with increasing temperature and annealing time, the disappearance of magnetic properties for both samples after annealing at the temperature of 800 °C, as well as a significant deterioration in corrosion resistance in the case of treatment at a higher temperature.

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