C.V.R. Murty

• Doctor of Philosophy
• Professor at Indian Institute of Technology Madras

The paper provides an analytical method to estimate the combined axial force P – shear force V – bending moment M capacity of solid and hollow reinforced concrete sections including effects of confinement. A fiber model is employed to perform the parametric study to understand the effects of section size and amounts of longitudinal and transverse r...

The actual capacity of a reinforced concrete (RC) structure is determined by the overstrength capacity of individual members. RC members can undergo six stages (namely cracking , yielding , spalling , buckling , crushing and rupturing ) depending on the cross‐section geometry, reinforcement detailing, and type of loading. For members under compress...

This study presents an improved understanding of the stress distribution in the joint region of weak-axis connections in steel MRFs, and based on this understanding, connection configurations have been proposed for the column-to-foundation connections Columns in MRFs are subjected to lateral forces along their strong and weak axes. To ensure ductil...

The paper describes the procedure employed for developing a new earthquake zone map of India as part of the seventh revision of the Indian Earthquake Standard IS 1893 (Part 1). This new zone map is based primarily on a probabilistic earthquake hazard analysis performed at a grid spacing of 0.1°×0.1° in longitudes and latitudes of the entire country...

Structures designed by conventional method of earthquake resistant design and built in near-fault (NF) regions are vulnerable to the distinctly different characteristics of NF earthquake strong ground motions¸ which are not considered in conventional earthquake hazard estimation. The 2015 Nepal and 2023 Turkey-Syria Earthquakes reiterated this. Str...

Seismo-geodetic studies in the Himalayan region indicate the accumulation of large strains and the likelihood of large magnitude earthquakes occurring anytime in the region; this can adversely affect the lives of several million people. Near-fault ground motions of large-magnitude earthquakes result in residual ground displacement parallel to the f...

Near-fault earthquake ground motions have high horizontal and vertical ground accelerations. Vertical ground acceleration induces additional compressive axial force demand in RC bridge piers in near-fault regions. This sudden rise in the vertical axial force demand can move the performance point of the RC cross-section above the balance point on th...

Fiber reinforced polymer (FRP) materials are being used for the last two decades as reinforcement in new concrete structures and prestressing tendons in pretressed concrete structures. In addition, they are being used at large scale in external strengthening and/or retrofitting of deficient structures to restore the strength and stiffness of the st...

Design of RC beams with longitudinal reinforcement made of steel bars has adopted the philosophy of Under-Reinforced Design. But, Concrete Beams with FRP longitudinal bars need a reconsideration of this philosophy. The large strength of FRP bars and low strength of concrete obviates Over-Reinforced Design. By suitably increasing the amount of FRP l...

Confinement of concrete helps in improving ultimate strain of concrete. This increase depends on amount of transverse reinforcement in the vertical member. While 135° hooks are mandatory in transverse reinforcement, the distribution of transverse steel along the two principal plan directions of the vertical member influences the increase in the ult...

This article presents probabilistic seismic hazard analysis (PSHA) of India and adjoined region, carried out to develop a new national seismic hazard map for India. The hazard map is developed using fault oriented spatially smoothed seismicity approach. A catalog of earthquakes has been compiled for the region (Latitude 5⁰N − 40⁰ N and Longitude 65...

A seismic design method is proposed for RC frame buildings, with focus on two of the seven virtues of earthquake resistant buildings, namely deformation capacity and desirable collapse mechanism. Fundamental lateral translation mode of the building and plastic rotation capacity of beams are included as input to estimate lateral force demand. Guidel...

This paper presents the results of a study on the characteristics of vertical-to-horizontal ratio (V/H) of 5% damped acceleration spectra for Indian ground motion records. Preliminary analysis indicates that at least 50% of the records exceed the Indian seismic design code considered norm of 2/3 at both the short and long period ranges. In addition...