Dr.Appa Rao G

Dr. G. Appa Rao
Professor
Phone: +91-44-22574279
Email: garao@iitm.ac.in

Education
  •  Ph.D : Structural Engineering (Civil Engineering), Indian Institute of Science, Bangalore (1998-2001)
  •  ME  : Structural Engineering (Civil Engineering), Indian Institute of Science, Bangalore (1989-1991)
  •  BE     : Civil Engineering, Andhra University, College of Engineering, Visakhapatnam, 1985-89
Professional Experience
    • Assistant Professor, Structural Engineering Laboratory, Department of Civil Engineering, Indian Institute of Technology Madras since 2003
    • Stayed more than two years as visiting Scientist and Humboldt fellow at the University of Stuttgart during June 2005 to September, 2008.
    • Alexander von Humboldt Fellow, (May, 2006-July, 2007)
    • DFG-INSA Fellow, 19 June-31 July, 2005
    • Associate Professor, Department of Civil Engineering, Sri Venkateswara University, Tirupati (2001-2003)
    • Assistant Professor, Department of Civil Engineering, Sri Venkateswara University, Tirupati (1992-2001)
    • Scientist, Snow and Avalanche Study Establishment, Defenec Research and Development Organisation, Manali (HP) (1991-1992)
Research Interests
  • Fracture Mechanics of Concrete (Applications)
  • Reinforced and Prestressed Concrete
  • FE Modeling and Strengthening of RC Joints/Connections
  • Structural Materials
Recent Publications

Journals

  • Appa Rao, G. (1998): Influence of Silica Fume Replacement of Cement on Expansion and Drying Shrinkage of Mortar. Cement and Concrete Research, 28(10), 1505-1509.
  • Appa Rao, G. (2001): Influence of Silica Fume on Long -Term Strength of Mortars Containing Different Aggregate Fractions. Cement and Concrete Research, 31, 07-12.
  • Appa Rao, G. (2001): Long -Term Drying Shrinkage of Mortar –Influence of Silica Fume and Size of Fine Aggregate. Cement and Concrete Research, 31, 171-175.
  • Appa Rao, G. (2001): Role of Water-Binder Ratio on the Strength Development in Mortars incorporated with Silica Fume. Cement and Concrete Research, 31, 443-447.
  • Appa Rao, G. (2001): Generalization of Abrams’ Law for Cement Mortars. Cement and Concrete Research, 31, 495-502.
  • Appa Rao, G. (2001): Dev. of Strength with Age of Mortars Containing Silica Fume. Cement and Concrete Research, 31, 1141-1146.
  • Appa Rao, G., and Raghu Prasad, B.K. (2002): Fracture Energy and Softening Behavior of High-Strength Concrete. Cement and Concrete Research, 32, 247-252.
  • Appa Rao, G., and Raghu Prasad, B.K. (2002): Influence of the Roughness of Aggregate Surface on the Interface Bond Strength. Cement and Concrete Research, 32, 253-257.
  • Appa Rao, G. (2003): Investigations on the Performance of Silica Fume Incorporated Cement Pastes and Mortars. Cement and Concrete Research, 33, 1765-1770.
  • Appa Rao, G., and Raghu Prasad, B.K. (2004): Influence of Type of Aggregate and Surface Roughness on the Interface Fracture Properties. Materials and Structures, 37, 328-334.
  • Pandurangan, K., and Appa Rao, G. “Comparison of Roles of FRP Sheets, Stirrups, and Steel Fibers in Confining Bond Critical Regions” (Hamad, B.S., and Ahmad, A.R.,) Discussion and Closure, Journal of Composites for Construction, ASCE/ Sept/Oct, 2007/553.
  • Appa Rao, G., Vijayanand, I., and Eligehausen, R. “Evaluation of Minimum Flexural Reinforcement from Ductility of RC Beams”, Materials and Structures, NL, 2008, 41, 759-771.
  • Appa Rao, G., and Srinivasa Rao, A. “Toughness Indices on Fiber Reinforced Concrete in Mode II Loading”, Mat Str, The Netherlands (2008, in print).
  • Mahajan, M., Appa Rao, G., Eligehausen, R. “Studies on behaviour of Eccentric RC Beam-Column Joints under Monotonic Loading”, fib Journal (Accepted).
  • Appa Rao, G. (2000): Strength Development in High-Strength Mortars: Influence of Mix Proportions. Indian Concrete Journal 11, 01-06.
  • Appa Rao, G. and Dayakara Reddy, V. (2002): Technical Education and Its Transformation. Participatory Experiment in Holistic Rapid Dev. N. Delhi, B.R. Pub. Corporation. 265-273.
  • Appa Rao, G., and Raghu Prasad, B.K. (2003): Strength and Fracture Toughness of Interfacial Zone in HSC. Jl of Structural Engg, 30(3), 153-161.
  • Appa Rao, G., and Raghu Prasad, B.K. (2005): Fracture Energy of Fiber Reinforced High Strength Concrete. Journal of Structural Engineering, 31(4), 249-255.
  • Appa Rao, G., and Raghu Prasad, B.K. (2005), “Size Effect and Fracture Process zone in High Strength Concrete”, Journal of Structural Engineering, SERC, 32(3), pp. 207-215.
  • Appa Rao, G., and Injaganeri, S.S. “Investigations of Size Effect on Shear Strength of Reinforced Concrete Beams”, JoSE, Feb-Mar, 2007,V.36, No. 6, pp.499-504.
  • Appa Rao, G., Aravind, J., and Eligehausen, R. “Evaluation of Minimum Flex. Reinforcement in RC Beams using Fictitious Crack Approach”, JoSE, V. 34, N. 4, Oct-Nov, 2007, pp. 277-283.
  • Appa Rao, G., Raghu Prasad, B.K., and Eligehausen, R. “Some Studies on relationship between Elastic and Mechanical Properties of Concrete”, JoSE, SERC, India, Feb-March, 2007.
  • Appa Rao, G., Raghu Prasad, B.K., and Eligehausen, R. “Characterization of Concrete using p-w curves and Tension Softening Modulus”, JOSE, August-September, 2008, V. 35, N. 3.
  • Appa Rao, G., Mahajan, M., Gangaram, M., and Eligehausen, R.”Performance of Nonseismically Designed RC Beam-Column Joints Strengthened by various Schemes subjected to Seismic Loads-A review”, Jl. of Strl Engg, India, 35 (01), April-May, 2008, 52-58.
  • Sreenivasa Rao, A., and Appa Rao, G. “Fracture behaviour and Toughness Indices of Fiber Reinforced Concrete under Mode II Loading”, JOSE; SERC, India (2008, in print).
  • Appa Rao, G., “Experimental Evaluation of Strength and Fracture Energy of High Flow Concrete”, Jl. of Structural Engineering, SERC, India (2008, in print).

Conferences

  • Appa Rao, G., Sudhakar Rao, P., and Eligehausen, R. “Parametric Studies on variability of Fracture Properties of Concrete”, 7th Intl. Conference on Concrete-Constructions and Sustainable Options, 07-10 July, 2008, Dundhee,Scotland.
  • Appa Rao, G., Yamini Sreevalli, I. “Long-Term Prestressing Losses in Nuclear Power Plant Structures”, 7th Intl. Conf on Concrete-Constructions and Sustainable Options, 07-10 July, 2008, Dundhee, Scotland.
  • Mahajan, M., and Appa Rao, G. “Numerical studies on and shear strength of RC beam column joiunts incorporating fracture parameters”, IQC on Fracture, 03-07 Aug, 2008, Bangalore, India.
  • Pandurangan, K., and Appa Rao, G. “Bond stress – slip law and cracking of epoxy coated reinforced concrete”, IQC on Fracture, 03-07 August, 2008, Bangalore, India.
  • Appa Rao, G., and Sreenivasa Rao, A. “Development of Standard Test Method for Determination of Toughness Indices in Mode II Failure” IQC on Fracture, 03-07 August, 2008, Bangalore, India.
  • Mahajan, M., Appa Rao, G., Eligehausen, R. “Studies on behaviour of Eccentric RC Beam-Column Joints under Monotonic Loading”, 7th fib Ph.D Sym in Civil Engg, 11-13, September, 2008, Stuttgart, Germany.
  • Yamini Sreevalli, I., Appa Rao, G. “Prediction of Loss of Prestress due to Relaxation of Prestressing Cables”, 7th fib Ph.D Symp in Civil Engg, 11-13 Sept, 2008, Stuttgart, Germany.
  • Appa Rao, G., Thomson Jacob and R. Eligehausen, R. “Crack Controlled Design of Reinforced Concrete Beams”, Intl Conference on CENeM-2007, 11-14 Jan., 2007, BESU, Howrah, India.
  • Injaganeri, S.S., and Appa Rao, G. “Size Effect-Its Implications on design of RC members in Shear”, International Conference on CENeM-2007, 11-14 Jan., 2007, BESU, Howrah, India.
  • Appa Rao, G., and Eligehausen, R. ”Seismic retrofitting of RC beam-column joints”, 3rd Indo-German Workshop and Theme Meeting on Seismic Safety of Structures, Risk Assessment and Disaster Mitigation, 12-13 Mar, 2007, BRNS, Mumbai, pp. 95-103.
  • Appa Rao, G., Yamini Sreevalli, I., Meher Prasad, A., Reddy, G.R., and Prabhakar, G. ”Temperature effects on loss of prestress due to relaxation of steel”, 3rd Indo-German Workshop and Theme Meeting on Seismic Safety of Structures, Risk Assessment and Disaster Mitigation, 12-13 Mar, 2007, Mumbai, pp. 190-198.
  • Appa Rao, G., and Kunal, K. “Shear Strength of Reinforced Concrete Deep Beams”, FraMCOS-6, 17-22, June, 2007, Catania, Italy, pp. 693-699.
  • Appa Rao, G., Vijayanand, I., and Eligehausen, R. Experimental Studies on Ductility of RC beams in Flexure and Size Effect”, FraMCOS-6, 17-22, June, 2007, Catania, Italy, pp. 671-675.
  • Appa Rao, G., Faiz, S., Pandurangan, K., and Eligehausen, R. “Studies on Pull-out Strength of Ribbed Bars in High Stre. Conc”, FraMCOS-6, 17-22 June, 2007, Catania, Italy, pp. 775-780.
  • Appa Rao, G., Rao, A.S., and Eligehausen, R. “Behaviour of Fiber Reinforced Concrete in Mode I and Mode II Failures”, Intl. Workshop on FRC, FraMCOS 6, 22 June, 2007, Italy.
  • Appa Rao, G., Pandurangan, K., and Eligehausen, R. “Effect of Embedment Length on bond stress-slip response in High Strength Concrete”, 2nd Symposium on Connections between Steel and Concrete, 04-07, Sept., 2007, Stuttgart, Germany, pp. 1161-1170.
  • Yamini Sreevalli, I., Appa Rao, G., and Reddy, G.R. “Effect of Temperature on Prestress Loss due to Relaxation of Steel Cables, Proc. SEWC, Bangalore, 02-07, Nov, 2007, pp. 156.
  • Appa Rao, G., Kadhiravan, D., and Eligehausen, R. “Analytical Studies on Bond-Slip response in RC structures”, SEWC, Bangalore, 02-07, Nov, 2007, pp. 153.
  • Injaganeri, S.S., and Appa Rao, G. “A Model for Minimum Shear Reinforcement in Reinforced Concrete Beams”, ESCS-2006 Symposium,14-16, June, 2006, Finland.
  • Injaganeri S S and Appa Rao G. “Size Effect in Shear – A Simple Model for Prediction of Diagonal Cracking Strength” – “10th EAPC on Str Engg and Constn”., 3-5 Aug 2006, Bangkok.
  • Appa Rao, G. “Anchorage Bond and Seismic Retrofitting Schemes in Beam-Column Joints”, Alexander von Humboldt Introduction Conf, 12-13 October, 2006, Germany, p.89.
  • Appa Rao, G., Injaganeri, S.S., Suresh, P. (2005): Effect of Web Reinforcement on Shear Strength of RC Beams. ICACS-2005, SERC, India, January 2005, 559-566.
  • Injaganeri, S.S., and Appa Rao, G. “Prediction of Shear Strength of RC Beams w/o Web Reinft”, 3rd Speciality Conf on Concl Appr to St. Design, 25-26 Aug, 05, Singapore, .111-118.
  • Mahajan, M.A., Appa Rao, G., and Sengupta, A.K. “Seismic Design Requirements of RC Beam-Colmn Joints”, 3rd Speciality Conf on Conceptual Appr to Str Design, 25-26 Aug‘05, Singapore, pp.125-132.
  • Injaganeri, S.S., and Appa Rao, G. “Ductility of High Strength Concrete”, SEC-05, 14-16, Dec’ 05, pp. 408.
  • Thomson, J., and Appa Rao, G. “Analytical Model for Prediction of Minimum Flexural Reinforcement using Fracture Mechanics”, SEC-05, 14-16, Dec’ 05, Bangalore, pp. 408.
  • Appa Rao, G., Milinda, A., Mahajan, and Eligehausen, R. “Efficiency of Seismic Retrofit of RC Beam-Column Joints”, SEC-2005, 14-16, December, Bangalore, pp. 424.
  • Appa Rao G., and Vivek, P. “Understanding bond-slip in Reinforced Concrete Structures”, SEC-2005, 14-16, Dec., 2005, Bangalore, pp. 425.
  • Appa Rao, g., Injaganeri, S.S., Suresh, P. (2005): Effect of Web Reinforcement on Shear Strength of RC Beams. ICACS-2005, SERC, India, January 2005, 559-566.
  • Injaganeri, S.S., and Appa Rao, G. “Prediction of Shear Strength of RC Beams w/o Web Reinft”, 3rd Speciality Conf on Concl Appr to St. Design, 25-26 Aug, 05, Singapore, .111-118.
  • Mahajan, M.A., Appa Rao, G., and Sengupta, A.K. “Seismic Design Requirements of RC Beam-Colmn Joints”, 3rd Speciality Conf on Conceptual Appr to Str Design, 25-26 Aug‘05, Singapore, pp.125-132.
  • Appa Rao, G., and Raghu Prasad, B.K. (2004): Size Effect in Structural High Strength Concrete. FraMCOS-5, Colorado, USA, April 2004, 1083-1089.
  • Appa Rao, G., and Raghu Prasad, B.K. (2004): Ductility of High Strength Concrete in Tension. FraMCOS-5, Colorado, USA, April 2004 (Poster).
  • Appa Rao, G. (2004): Influence of Fibers, Specimen Size and Geometry on Fracture Toughness of HSC. ICFRC-04, Chennai, India, January 2004, 145-154.
  • Vivek, P., and Appa Rao, G. (2004): Anchorage Bond in Reinforced Concrete”, ICACC-2004, Hyderabad, India, December 2004, 201-210.
  • Appa Rao, G., and Raghu Prasad, B.K. (2003): Fra. Toughness of Fiber Re. Comp Notched Beams. Proc of Int Conf on Re. Trends in Con. Tech and Strs, C’batore, Sep., 186-194.
  • Appa Rao, G., and Uma Shankar Reddy, D. (2003): Evaluation of Rheology of Self Compacting Concrete. ICI Tech. Vol. on Int Sym on Inn. World of Con, ICI, Pune, Sep.,pp. 15.
  • Appa Rao, G., and Raghu Prasad, B.K. (2003): Ductility of GFRP Re. Composite Notched Beams. ICI Tech. Vol on Intl Sym on Inn World of Conc, ICI, Pune, India, Sep, 2003, pp. 13.
  • Appa Rao, G., Raghu Prasad, B.K. and Malathy, R. (2002): Characterization of Interface in HPC-A Fra Mech Approach. Intl Conf on Our World in Con and Strs, S’pore, Aug., 155-161.
  • Appa Rao, G., and Raghu Prasad, B.K. (2000): Fracture Properties and Size Effect in HPC. Pro of 14th EM Conf (EM 2000), ASCE, Uni of Tex. Austin, US, May, pp. 204 (CD).
  • Appa Rao, G., and Raghu Prasad, B.K. (2000): Fracture Toughness of Fiber-Reinforced HSC. Pro. of the 14th Engg Mech Conf (EM 2000), ASCE, Univ. of Texas, Austin, May, pp. 203.
  • Appa Rao, G., and Raghu Prasad, B.K. (2001) “Fracture Process Zone in High-Strength Concrete”, FraMCos-4, Cachan, France, May -June, 2001, 327-332.
  • Appa Rao, G., and Raghu Prasad, B.K. (2001): Interfacial Fracture Properties in HSC in Mode-II Failure. CONSEC’01, UBC, Vancouver, Canada, June 2001, 1209-1216.
  • Appa Rao, G., and Raghu Prasad, B.K. (2001): Softening Behavior of High Performance Concrete. Intl Conf on Civil Engg, Ind. Ins. of Sci. Bangalore, India, July 2001, 09-16.
  • Appa Rao, G., Yamini Sreevalli, I., and Reddy, G.R. ”Temperature Effect on Prestressing Losses and Codal Provisions”, Natural Calamities and Disaster Management, 27-28 Feb., 2006, Visakhapatnam.
  • Appa Rao, G. “Performance Modifying Mechanisms of Silica Fume in Concrete”, HPC-2006, 24th Feb., 2006, JNTU Ananthapur, A.P., India.
  • Appa Rao, G. (2005), “Strength and Behaviour of High Flowing concrete”, Nat. Conference on AMMCS-05, IITM, pp. 220-225.
  • Injaganeri, S.S., Vijayanad, I., and Appa Rao, G. ”Flexural Behaviour of Geometrically Similar RC Beams-A Fracture Mechanics Approach”, NWAMMCS, 02-03, July, 2004.
  • Raghu Prasad, B.K. and Appa Rao, G. (2001): Fracture Behavior of High Strength Concrete. Nat Workshop on Safety of Nuclear Power Plant Strs, Bangalore, India, July 2001, 165-176.
  • Raghu Prasad, B.K., and Appa Rao, G. (2001): Fracture Energy of Silica Fume/Fly Ash HSC”, Nat WS on Advances in Strl Engg at Tirupati, India, December 2001, 22-35.
Research and Consultancy

Sponsored Research Projects

  • Studies on Seismic Behaviour of Nonseismically Designed RC Beam-Column Joints with Haunch Element Retrofit”, BRNS, Cost. Rs. 27,46,900/- (2008-2011).
  • Towards understanding the Standard Bond Test and Development of Model for Bond Strength of Lap Splices in Reinforced Concrete”, DST, Project Cost Rs. 11,59,000/- (2007-10).
  • Evaluation of Relaxation Loss in Prestressing Cables for 100 Years-Phase I”, BRNS, BARC, Mumbai, Cost. Rs. 17,50,000/-(2004-2007).
  • Characterization of Fracture Surfaces through Fractal Analysis of Cementitious Materials”, by DST, SERC, India, Cost. Rs. 5,39,000/- (2003-06).
  • Evaluation of Relaxation Loss in Prestressing Cables for 100 Years-Phase II”, BRNS, BARC, Mumbai, Cost Rs. 4,12,000/-(2007-08).
  • Evaluation of Behaviour of High Strength Concrete Structures under Cyclic Loading”, by IIT Madras, Cost. Rs. 5,00,000/- (2004-08).
  • Development of Testing Facilities in Structural Engineering Laboratory, IITM”, AvH Foundation, Germany, Euro. 20,000/- (Equivalent to Rs. 13,00,000/- (2008-2009).

     

Consultancy Projects

  • Safety Certificate and Proof checking of Design of Abirami Theatre”, Chennai, Cost of project: Rs. 5.60 Lakhs.
  • Stability Analysis and Design of High Rise Buildings for Earthquake Forces in Zone III”, Cost of Project Rs. 3, 50,000/- (2007).
  • Thermal and Cooling Studies on Pulichintala Dam, Andhra Pradesh”, Six Months, Cost of the Project, Rs. 3, 30,000/-(2006).
  • Studies on Temperature Effects on Strength and Mix Proportions of Concrete”, Tirumala Tirupati Devasthanam, Tirupati, Six Months, Cost of the Project, Rs. 2,45,000/-(2005)
  • Concrete Mix Design for Resurfacing of Taxi Track in Prothrapur, Portblair, Andaman Nicobar Islands”, Cost of Project Rs. 83,000/- (2008).
Student Guidance

Past Ph. D and M. S.

  • Study of Fracture Behaviour and Toughness Indices of Steel Fiber Reinforced Concrete under Mode II Loading”, A. Srinivasa Rao, 2008, JNTU.
  • Investigations on Ductility and Size Effect on Shear Strength of RC Beams”, Injaganeri, S.S., 2006.
  • Studies on Anchorage Bond in Reinforced Concrete”, P. Vivek, 2006.
  • Prediction of Minimum Flexural Reinforcement in RC Beams”, Thomson Jacob, 2006.
Current  Ph.D
  • K. Pandurangan, Studies on Bond Strength and Bond Stress-Slip Response in Epoxy Coated Reinforced Concrete” (Registered in 2005)
  • Milinda Mahajan, Studies on Eccentric Beam-Column Joints under Monotonic and Cyclic Loading (Registered in 2004)
  • I. Yamini Sreevalli, Evaluation of Losses due to Relaxation of Prestressing Cables (Registered in 2006)
  • R. Sundaresan, Studies on Size Effect in Reinforced Concrete Deep Beams” (Registered in 2007)
  • K. Amarvel, Life Estimation of RC Bridge Girders” (Registered in 2008)
  • BSRK Prasad, Experimental Studies on Effect of Horizontal Reinforcement on Strength of RC Deep Beams” (External Regn JNTU)
Current  M. S.
  • K. Sesaiah, Deterioration of Bond Strength in Beam-Column Joints under Cyclic Loading”

Current  M. Tech

  • N. Dayakar Naik, Design of Connection Detailing in Haunch Elements in Beam-Column Joints
  • Y. Ravi Kiran, Numerical Studies on Ductility of Beam-Column Joints
Courses

Under Graduate Courses

  • Structural Design I
  • Mechanics of Solids
  • Structural Design II
  • Basic Design of Concrete Structures
  • Advanced Structural Design
  • Advanced Design of Structural Systems
  • Analysis of Structures

Graduate Courses

  • Fracture Mechanics of Concrete
  • Experimental Techniques
  • Industrial Seminar
  • Theory and Design of Reinforced Concrete Structures
  • Theory of Elasticity
  • Finite Element Analysis
  • Concrete Technology
  • Advanced Structural Steel Design
Continuing Education