Flexural Capacity of Rattan Cane Reinforced Concrete Beams

To overcome the dependence on the use of reinforcing steel in concrete, alternative materials are used as reinforcement that is easy and cheap to obtain the resistant of corrosion namely rattan rods. With this material the natural resources can be utilized optimally. This research uses rattan as reinforcement for concrete beams. The test is carried out using a two-point loading method, used 4 types of beams, namely 2 rattan reinforcement beam (BR2), 3 rattan reinforcement (BR3), 4 rattan reinforcement (BR4) and 2 steel reinforcement (BS2) as control beams. The test results show that the addition of 2 times the amount of rattan reinforcement resulted in an increase in flexural capacity of 48.51%. The flexural capacity of rattanreinforced beams is lower than the flexural capacity of steel-reinforced beams by 10%, so the use of rattan as reinforcement in non-structural construction.

Pengaruh Penambahan Tulangan Tekan Terhadap Momen Kapasitas Lentur dan Daktilitas Balok

Double reinforcement beam design, increasing the compressive reinforcement can increase the flexural capacity moment and ductility of concrete beams. This helps planners to improve flexural capacity moment with minimal dimensions, that are still acceptable in terms of aesthetics. The purpose of this study is to know how much influence the increasing compressive reinforcement can increase the flexural capacity moment and ductility of concrete beams. Experimental research with beam specimens 20x20x60 cm, 2D16 tensile reinforcement, fc’ 25 mpa and fy 320 mpa. With a ratio of compressive reinforcement to tensile reinforcement of 0.14; 0.25 and 0.59. Flexural strength testing uses flexible loading with a roll-pined joint. The process of load reading is yield phase until ultimate phase. The results of the analysis show an uses of increasing compressive reinforcement can increase the moment of flexural capacity and ductility. The addition of compressive reinforcement reached 25% from tensile reinforcement, can increase the moment of bending capacity by 4.47%, but uses compressive reinforcement reached 50% of tensile reinforcement, only increasing the bending moment capacity of 1.43%. For ductility, uses compressive reinforcement reaches 25% from tensile reinforcement, can increase ductility by 19.73% and an increase of 26.17% by adding compressive reinforcement up to 50% of tensile reinforcement. From these results it appears that the more improvements added, the more the ductility increases and the less the moment the flexural capacity increases.

Flexural Behaviour of HYFRC Beam Reinforced with GFRP Rebar

This paper offers the experimental have a take a look at at the flexural behaviour of HYFRC beams bolstered with glass fiber bolstered polymer (GFRP) rebar and in comparison with everyday metal reinforcement beams. Three beams reinforced with GFRP rebar and three beams of traditional concrete metal strengthened with absolutely six beams have been casted and tested under two points loading. The partner specimens were casted along with beam and tested for concrete homes. Steel and glass fibres are used toimprove the concrete assets. From checking out, load carrying capability, loaddeflection traits, crack sample, crack width, concrete traces throughout move phase and failure mode have been mentioned stiffness, ductility and power dissipation potential had been additionally calculated. The average ultimate load wearing potential of GFRP rebar and normal steel reinforcement beam is one hundred twenty five.8KN and ninety seven.5KN respectively. The most deflection cited at their closing load inside the GFRP rebar and regular metal reinforcement beam is 27. Three mm and sixteen. 3 mm respectively. It changed into also found that after load elimination, deflected GFRP beam regain its authentic function and crack width also reduced. In metal beam, metallic rebar were yielded, after load elimination, no deflection regain and crack width reduction have been observed

Tulangan tarik berbanding tulangan tekan pada balok tulangan rangkap

What is the percentage of efficient compressive and tensile reinforcement on double reinforcement blocks. In this study, we will look for the percentage of compressive reinforcement to the tensile reinforcement in the quadruple double reinforcement beam which has a maximum capacity. With a number of beam sizes that are often used in multi-storey buildings, the percentage of 0 has maximum beam strengthKeywords: percentage of compressive reinforcement, tensile and maximum beam capacity

TINJAUAN RETAK AWAL BALOK BETON BERTULANG YANG DIPERKUAT DENGAN STRAND TANPA PENEGANGAN

ABSTRACTReinforcing method of reinforced concrete beam has been done in Indonesia, one of them is by using of strand stressing. Strandstressing need additional technology so that strand reinforcing is not much in demand. Strand has high strength, so using strand needs to be modified in order to take advantage of the material. In this study, the strand will be used to reinforce of reinforced concrete beam by using epoxy and U-steel as anchors.The research methodology based on experimental in the laboratory. The samples are consist of 3 specimens : the first is specimen without using of reinforcement (BU01), the second is specimen with reinforcement by using epoxy and 3 U-steel as anchors(BU02), the third is specimen with reinforcement by using epoxy and 7 U-steel as anchors(BU03). Specimens dimensions of reinforced concrete beam are 150 mm x 300 mm with a span of 3000 mm.The results show that the initial crack occurred in mid span beam on the pull side. The loads causing initial crack as follow: at BU01 = 6.22 kN, at BU02 = 3.95 kN and at BU03 = 0.25 kN. The results research show that initial cracking load of the specimen is inversely proportional with the number of anchor. If the number of anchor is greater, the cracking load will be smaller.Keywords: reinforcement beam, steel of strand, initial crackABSTRAKMetode perkuatan balok beton bertulang sudah banyak dilakukan di Indonesia, salah satunya menggunakan baja strand yang ditegangkan. Penggunaan baja strand sebagai perkuatan masih terbatas dengan melakukan penegangan. Penegangan pada strand memerlukan teknologi tambahan sehingga perkuatan menggunakan strand tidak banyak diminati untuk perkuatan. Mengingat kekuatan strand yang tinggi maka pemanfaatan strand perlu dilakukan modifikasi agar dapat mengambil kelebihan dari material tersebut. Pada penelitian ini pemanfaatan strand digunakan untuk perkuatan balok bertulang tanpa dilakukan penegangan tetapi diikat dengan epoxy dan baja U yang diangkurkan ke balok beton bertulang.Metodologi penelitian yang digunakan menggunakan experimental di laboratorium. Benda uji terdiri dari 3 buah yaitu benda uji normal tanpa menggunakan perkuatan (BU01), benda uji dengan perkuatan strand tanpa penegangan yang diikat dengan epoxy dan 3 baja U yang diangkurkan ke balok beton bertulang (BU02) dan benda uji dengan perkuatan strand tanpa penegangan yang diikat dengan epoxy dan 7 baja U yang diangkurkan ke balok beton bertulang (BU03). Dimensi benda uji balok beton bertulang adalah 150 mm x 300 mm dengan bentang 3000 m.Hasil penelitian menunjukkan bahwa retak awal terjadi di tengah bentang (mid span) balok pada sisi tarik. Beban yang menyebabkan retak awal pada BU01 = 6,22 kN, BU02 = 3,95 kN dan BU03 = 0,25 kN. Hasil tersebut menunjukkan bahwa benda uji yang mempunyai lubang angkur untuk mengikat strand semakin banyak maka beban yang menyebabkan retak awal semakin kecil.Kata Kunci : perkuatan balok, baja strand, retak awal

STUDI PERKUATAN BALOK BETON BERTULANG DENGAN STRAND TANPA PENEGANGAN DAN TULANGAN U

ABSTRACTIncreasing capacity of structures can be done by various methods, one of them is by reinforcing on bridge structure.Reinforcement by using strand has been used on building construction but on reinforced concrete beams because of the problems on it’s execution. The focus of this research is how to install non-stressing strand as reinforcement material.The basic of the research is full-scalled loading test on structure laboratory. There are 2 loading test samples : a sample without reinforcement (Bo) and a sample with reinforcement(B1). The test specimen will be subjected to static monotonic loading until the collapse. The dimensions of the test specimen are 150 x 300 (mm) and the length of the span is 3200 mm.The result of loading for the reinforced concrete beam and reinforcement beam, the yield force value was 22 kN and 27 kN respectively, while deflection value was 9.5 mm and 13 mm respectively.Keywords: beam, reinforcement, strand without stressing, static load.ABSTRAKPeningkatan kemampuan(kapasitas) infrastruktur khususnya jembatan dapat dilakukan dengan berbagai metode, salah satu untuk meningkatkan kemampuan tersebut dengan memperkuat jembatan.Perkuatan menggunakan strand sudah digunakan pada berbagai konstruksi bangunan tetapi untuk balok beton bertulang belum banyak dilakukan karena akan mengalami kesulitan dalam metode pelaksanaan. Sehingga dalam penelitian ini akan mencoba menggunakan metode pemasangan strand tanpa penegangan sebagai bahan perkuatan.Penelitian dilakukan dengan cara pengujian eksperimental di laboratorium dan. Benda uji yang digunakan terdiri dari 2(dua) buah yaitu 1(satu) benda uji balok beton bertulang tanpa perkuatan(Bo) dan 1(satu) buah benda uji balok beton bertulang dengan perkuatan(B1). Benda uji akan dilakukan uji pembebanan statikmonotonik sampai mengalami keruntuhan. Dimensi benda uji 150 x 300 (mm) dan panjang bentang 3200 mm.Dari hasil pengujian terhadap balok beton tanpa perkuatan dan balok perkuatan didapatkan nilai gaya leleh berturut – turut sebesar 22kN dan 27kN serta lendutan berturut –turut sebesar 9.5 mm dan 13 mm.Kata kunci : balok, perkuatan, strand tanpa penegangan, beban statik

Study on Estimate of Load Ratio of Doubly Reinforced Concrete Beam Exposed to the Standard Fire

There are a lot of concerns on safety structure performance by being buildings to be large and high-rise. In particular, damage due to the fire recently leads to a large disaster and therefore a variety of countries operate the regulation on the fire resistance performance depending on the building structure. There are differences on the fire resistance design in each country but 50% of the design load is suggested to be reasonable for the normal temperature during the fire by applying the concept of the loading ratio to the fire resistance design of structures. Since the loading ratio is the factor having a major impact on the evaluation of the fire resistance performance, it should be preferentially considered. The study on setting up the loading ratio to evaluate the fire resistance performance and safety of structures has yet to be fully furnished in South Korea. Therefore, in this paper, the loading ratio proper for the construction status in South Korea is to be taken into account and then the ratio is to be proposed on the single reinforcement beam.

Bridge Bearing Capacity Test and the Application Research Carbon Fiber Reinforcement Technology

First, conducting static load tests for a 5 span bridge, then carry on application research for the bridge based on the embedded carbon fiber (CFRP) reinforced flexural reinforcement aiming at the shortcomings of its flexural properties, At last, the effectiveness of strengthening reinforced concrete beam that reinforcement by embedded CFRP has been discussed. The results show that embedded CFRP reinforcement beam can make full use of the characteristics of high strength of CFRP, which can improved obviously the capacity of the reinforced beam and the maximum increased capacity can reach 13.2%. In addition, the application of the embedded CFRP reinforcement technology has been discussed, which provides a meaningful reference for the development of the technology.

Application of Flexural Timber Reinforcement in Light Concrete Beam Structure

Timber is a capable alternative for reinforcement in concrete beam because it possesses high strength ratio compare to its weight although its strength is incompatible to steel. This study was conducted to highlight the flexural behaviour of beam reinforced with two types of timber; Balau and Meranti. Comparisons of behaviour have been made between samples applying the Reinforced Concrete Design to EC2. The result of flexural test shows that steel reinforcement beam (SRB) carried the utmost loads compared to timber sample beam which reinforced with Balau (BRB) and Meranti (MRB). Compared to the flexural strength of SRB, BRB reached about 69 % of the value while MRB reached to 66 % respectively. It was found that the failure mode of the timber beam was closely related to the load-deflection behaviour same as conventional steel beam. The larger the load-deflection value, the wider the range of cracking occurred.