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Structural Engineering: Recent submissions

Now showing items 421-440 of 446

COMPARISON OF CONVENTIONAL PARTIONING SYSTEM WITH LIGHT GAUGE STEEL PARTIONING IN MULTI-STOREY BUILDINGS

M.Aqib Usman (NUST-SCEE, 2015)

The population is growing so fast that the world's population will jump from 6.5 billion to around 9 billion over the next 50 years. The resources of the earth are depleting very fast. It is ultimate need of the time to ...
Use of Lime, Marble Powder and Bagasse Ash as SRMs in SCP Systems.

Wajahat Ali (NUST-SCEE, 2014)

This study is focused on analyzing the effect of some of the local SRMs which include Lime, Bagasse Ash (BA) and Marble Powder (MP) on the self compacting paste systems (SCP). These materials, if left un-utilized ...
To Investigate the Mechanical Properties of Cement Mortar Incorporated with Graphite Nano-Platelets

Arslan Qasim (NUST-SCEE, 2014)

Concrete has been used as a construction material since 700 BC. It offers high compressive strength but is weak in tensile strength. These investigations mainly focus on feasibility of graphite nano materials in improving ...
Study of the Behavior of Secondary Raw Materials in Self- Compacting Cementitious System

Umar Maqsood (NUST-SCEE, 2014)

Self-compacting cementitious system (SCCS) is a modern concept introduced in the construction industry and is being used throughout the world. Self-compacting cementitious Systems have major applications in placements ...
STRENGTHENING OF R.C BEAMS USING FIBER REINFORCED POLYMERS

Mansoor Hussain Bhatti (NUST-SCEE, 2014)

R.C structures have a certain age after which they are not safe to use. They deteriorate over time and become unsuitable for the purpose they were built for. R.C structures could be in the form of beams, columns, footings, ...
SEISMIC PERFORMANCE AND VULNERABILITY ASSESSMENT OF MASONRY INFILLED STEEL AND CONCRETE FRAMES

M. Khubaib Ilyas Khan (NUST-SCEE, 2014)

Construction of masonry infilled frame structures is common practice in countries like Pakistan. Infills contribute to the performance of structures which is generally neglected in analysis and design by considering it as ...
Rehabilitation of Buildings damaged due to Earth Quake

Muhammad Usman Malik (NUST-SCEE, 2014)

Any structure can take limit amount of load or stress and it fails beyond that. Structural failure can be caused by different reasons and Earth Quake is one of them. Earth Quake damages the building when Earth Quake loading ...
PROBABALISTIC SEISMIC VULNERABILTY ASSESEMENT OF RC FRAME STRUCTURES

Uzair Maqbool Khan (NUST-SCEE, 2014)
Impact Response Analysis of Reinforced Concrete Beam Under Falling Weight Impact Load

Imtesal Afzal (NUST-SCEE, 2014)

Civil infrastructures all over the world are prone to natural disasters causing colossal damages. These natural disasters range from falling weight, avalanches and accidental loads to earthquakes, floods and tornadoes. In ...
ENERGY EFFICIENT BUILDING DESIGN

Saba Zulfiqar (NUST-SCEE, 2014)

Availability and use of electricity and fuel is the major concern for Pakistan. People go without electricity for half of the day and sometimes even more. New sustainable initiatives are needed to respond to the Pakistan ...
DEVELOPMENT OF ANDROID BASED APPLICATION FOR THE ANALYSIS & DESIGN OF CONCRETE STRUCTURES

Ahmed Aseem (NUST-SCEE, 2014)

This is the age of mobility and versatility; the technological endeavors of man have great implications on daily life affairs of an individual. A person looks for new and advanced systematic tools to accomplish his day to ...
Development of an Early Earthquake Loss Assessment Framework for Pakistan

Waseem Akhtar (NUST-SCEE, 2014)

Pakistan is located in a seismically active area. Several severe earthquakes have struck the region in recent history, killing thousands and destroying infrastructure worth millions. An Earthquake Loss Assessment Framework ...
THE SIZE EFFECT ANALYSIS OF STEEL CONCRETE BOND STRENGTH

Iqra Choudhry (NUST-SCEE, 2013)

This report presents a research and study on analysis of size effect on concrete steel bond strength. The utility of reinforced concrete (RC) as a structural material is derived from the combination of concrete that is ...
SEISMIC VULNERABILITY ASSESSMENT OF MASONRY INFILLED REINFORCED CONCRETE FRAME STRUCTURES

AYESHA SAIF (NUST-SCEE, 2013)
SEISMIC ANALYSIS OF REINFORCED CONCRETE STRUCTURES IN PAKISTAN

Unknown author (NUST-SCEE, 2013)

The objective of this research work is to compare seismic vulnerability of unrettrofitted frame structures and the retrofitted frame structures and to use those seismic vulnerabilities for the determination of risk in ...
REPAIR OF CONCRETE STRUCTURES USING FIBER REINFORCED CONCRETE

Unknown author (NUST-SCEE, 2013)

Fiber reinforced concrete is a concrete mix which utilizes fibrous material as reinforcement. These randomly oriented, uniformly distributed fibers exhibit a variety of properties when mixed with concrete. Steel fibers, ...
Incorporating Fracture Mechanics in the Design of Reinforced Concrete Structures

Unknown author (NUST-SCEE, 2013)

Concrete is usually described as the quasi-brittle material; its internal structure is entirely different from that of other engineering materials, which observes that the fracture processes in concrete are much different ...
Carbon Fiber Reinforced Polymer (CFRP) composites with fibers/fabrics bonded with organic polymers (resin system) are being referred to as the materials of 21st century because of many inherent advantages including market acceptance. The application of composites in civil infrastructure projects started in late 1980, with major advances in bridges, roads, retrofitting of structures, and marine applications. In the last decade, significant efforts have been made to develop design guidelines, and construction and maintenance standards, and specifications for FRP reinforcement, CFRP being one of them, FRP wraps, and FRP shapes including standardized test methods.. Strengthening with externally bonded CFRP fabric has shown to be applicable to many kinds of structures. Currently, this method has been applied to strengthen such structures as column, beams, walls, slabs, etc. The use of external CFRP reinforcement may be classified as flexural strengthening, improving the ductility of compression members, and shear strengthening. It is well known that reinforced concrete beams strengthened with externally bonded fiber-reinforced polymer (FRP) or CFRP to the tension face can exhibit ultimate flexural strength greater than their original flexural strength. However, these FRP and CFRP strengthened beams could lose some of their ductility due to the brittleness of FRP and CFRP plates. The high strength-to-weight ratio, resistance to electrochemical corrosion, larger creep strain, good fatigue strength, potential for decreased installation costs and repairs due to lower weight in comparison with steel, and nonmagnetic and non-metallic properties of fiber reinforced polymer (FRP) composites offer a viable alternative to bonding of steel plates. The emergence of high strength epoxies has also enhanced the feasibility of using CFRP sheets and carbon fiber fabric for repair and rehabilitation. In the experimental study conducted, there point Flexural testing method was used comprising of 6 samples of beams, the details of which are as follows;  2 control beams-CB(kept as the reference)  2 Un-cracked beam retrofitted with CFRP-CFB  2 Pre-cracked beam retrofitted with CFRP-RFB The various findings of the experiments are summarized as under;  The ultimate load-carrying capacity of the strengthened (CFB and RFB) beams was increased as compared to the control beams (CB).  CFRP sheets increased the strength and stiffness of the beams to a great extent with eventual de-bonding failure at the ultimate load.  Beams strengthened with CFRP sheets showed lesser deflections as compared to the control beams (CB).  The crack widths were decreased substantially in the strengthened beams as compared to those in the control beams, with a significant increment in the moment capacity of he strengthened beams.  The Pre-cracked (RFB) and Un-cracked (CFB) strengthened beams exhibited similar deflection characteristics. But pre-cracked beam showed about 60% more deflection than un-cracked beams at service load of the control beams (CB), but later on both showed similar behavior. Additional work and elaboration on various under-addressed aspects is necessary as discussed in the summary and recommendation section of this thesis, to exploit the profound and widespread benefits of CFRP composites in making the structures more economical, having longer service lives and exhibiting better performance with lower maintenance requirements.

Unknown author (NUST-SCEE, 2013)

Carbon Fiber Reinforced Polymer (CFRP) composites with fibers/fabrics bonded with organic polymers (resin system) are being referred to as the materials of 21st century because of many inherent advantages including market ...
Flexural Strength Enhancement of RC Beams using Carbon Fibers Reinforcement Polymers (CFRP)

Unknown author (NUST-SCEE, 2013)

Carbon Fiber Reinforced Polymer (CFRP) composites with fibers/fabrics bonded with organic polymers (resin system) are being referred to as the materials of 21st century because of many inherent advantages including market ...
Experimental Study of Ultra-High-Early Strength Repair Grout Systems

Unknown author (NUST-SCEE, 2013)

Ultra High Early Strength self-compacting repair grout (having compressive strength of about 3000 psi in half hour) is being used more and more frequently in repair of concrete structures and making pre-placed aggregate ...

Now showing items 421-440 of 446

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