3D RC beam–column joints retrofitted by joint enlargement using steel angles and post-tensioned bolts

Break even analysis & response of longer span frames with or without post-tensioned beams in multipurpose hall

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/1197/1/012011 ◽

2021 ◽

Vol 1197 (1) ◽

pp. 012011

Author(s):

Aniket Patkar ◽

Santosh Mukkawar

Keyword(s):

Concrete Beam ◽

Beam Element ◽

Rc Beam ◽

Span Length ◽

Primary Model ◽

Beam Method ◽

Break Even Point ◽

Better Than ◽

Prestress Concrete ◽

Post Tensioned

Abstract In this paper analyzed the RC a nd PT Beam against variation in the clear span length of the beam. This work includes the design and estimate of Cost/Beam from 5m span up to 15m span length of the beam. Also, The response of the frame following two variation in its modelling. Initially, The primary model consists of a conventional RCC frame with all beams and columns as RCC. The secondarily model considers peripheral beams as RCC and interior beams with PT. Such as ETABS software used to designed RC beam element and ADAPT-PTRC used to designed PT beam element. However it has been note that variation of cost with respect to the span of beam where the break-even point between RCC and PT technique is approx 7m Span. Also the control on deflection of beam by restrict the depth of beam by using unbonded Post-tensioned prestress concrete beam method. There is very good understand all aspects PT beam better than as compared with to RC beam in deflection against longer span length of beams. This paper gives suggestion about to reach a decidedly conclusion regarding which technique is superior over one another.

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Rehabilitation of earthquake damaged external RC beam-column joints by joint enlargement using prestressed steel angles

Earthquake Engineering & Structural Dynamics ◽

10.1002/eqe.2794 ◽

2016 ◽

Vol 46 (2) ◽

pp. 291-316 ◽

Cited By ~ 9

Author(s):

Jalil Shafaei ◽

Abdollah Hosseini ◽

Mohammad Sadegh Marefat ◽

Jason M. Ingham

Keyword(s):

Rc Beam ◽

Steel Angles

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Seismic retrofit of external RC beam–column joints by joint enlargement using prestressed steel angles

Engineering Structures ◽

10.1016/j.engstruct.2014.10.006 ◽

2014 ◽

Vol 81 ◽

pp. 265-288 ◽

Cited By ~ 44

Author(s):

Jalil Shafaei ◽

Abdollah Hosseini ◽

Mohammd Sadegh Marefat

Keyword(s):

Seismic Retrofit ◽

Rc Beam ◽

Steel Angles

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EXPERIMENT ON SHEAR OF POST-TENSIONED CONNECTION BETWEEN CONCRETE AND CAST IRON PLATE HAVING SHEAR-KEY

Proceedings of International Structural Engineering and Construction ◽

10.14455/isec.res.2015.167 ◽

2015 ◽

Vol 2 (1) ◽

Author(s):

Kiyoka Kinoshita ◽

Yusuke Maida ◽

Hiroyasu Sakata ◽

Kazushi Shimazaki ◽

Eiichiro Saeki ◽

...

Keyword(s):

Cast Iron ◽

Tensile Force ◽

Frictional Resistance ◽

Rc Beam ◽

Iron Plate ◽

Friction Resistance ◽

Shear Key ◽

Post Tensioned

In this paper, post-tensioned connection between concrete and cast iron plate having shear-key was adopted. Frictional resistance acts when there is no displacement between concrete and cast iron plate, shear-key also act to transmit stress to RC beam at the same time as the frictional resistance when the displacement occurs. Each specimen consists of RC beam and plate simulating post-tensioned connection. Ten specimens were tested. The parameter are type of plate, with or without the shear-key, the height of the shear-key, amount of the shear-key, difference between the post-tensioned force and whether or not applying vertical tensile force. In conclusion, it was needless to think their displacement by post-tensioned connection. And the strength of specimens with shear-key is presented by the sum of friction resistance and bearing resistance by using anamnestic formula.

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A Low-Cost Prestress Monitoring Method for Post-Tensioned RC Beam Using Piezoelectric-Based Smart Strand

Buildings ◽

10.3390/buildings11100431 ◽

2021 ◽

Vol 11 (10) ◽

pp. 431

Author(s):

Thanh-Cao Le ◽

Thi Tuong Vy Phan ◽

Trung-Hau Nguyen ◽

Duc-Duy Ho ◽

Thanh-Canh Huynh

Keyword(s):

Low Cost ◽

High Sensitivity ◽

Cost Effective ◽

Rc Beam ◽

Linear Regression Models ◽

Monitoring Method ◽

Electromechanical Impedance ◽

Force Monitoring ◽

Different Levels ◽

Post Tensioned

This study proposes a cost-effective prestress monitoring method for post-tensioned reinforced concrete (RC) beams using a smart strand. Firstly, the concept of a piezoelectric-based smart strand and its implementation for prestress force monitoring are developed. The smart strand is prepared by embedding inexpensive and high-sensitivity electromechanical impedance (EMI) sensors in a steel strand. Next, the feasibility of the proposed method is experimentally verified for prestress force monitoring of a simple supported post-tensioned RC beam. A smart strand prototype is fabricated and embedded into a 6.4 m RC beam which is then prestressed with different levels. For each prestress level, the EMI responses of the smart tendon are measured and the EMI features are extracted for prestress force monitoring. The results showed that the EMI signals of the smart strand showed strong resonant peaks that varied sensitively to the prestress level of the beam. The prestress change in the prestressed RC beam was successfully estimated by using linear regression models of the EMI features.

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