Islam Mantawy

Islam Mantawy
Rowan University

Ph.D., PE

About

31
Publications
7,451
Reads
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245
Citations
Additional affiliations
January 2019 - present
Florida International University
Position
  • Professor (Assistant)
June 2016 - December 2018
Louis Berger Group
Position
  • Designer
January 2013 - May 2016
University of Nevada, Reno
Position
  • Research Assistant
Education
January 2013 - May 2016
University of Nevada, Reno
Field of study
  • Civil Engineering

Publications

Publications (31)
Article
Full-text available
Structural health monitoring of infrastructure especially bridges plays a vital role in post-earthquake recovery. Coupling emerging techniques in machine learning with structural health monitoring can provide unprecedented tools for damage detection and identification. This paper explores the use of time-series acceleration or displacement data col...
Article
Concrete filled steel tubes (CFSTs) provide improved structural strength and ductility in addition to eliminating the need for column formwork. This research proposes new connection details for column-to-footing connection using ultra-high performance concrete (UHPC). Two connections consisting of an embedded and an encased layer of UHPC were selec...
Article
Automation and robotics are integral parts of many industries but their potential for field implementation has not been significantly recognized by the construction industry. This is mainly attributed to conventional construction and design practices which undermine the benefits offered by these new technologies such as repetitions, precision, time...
Article
Composite concrete sections are used in new construction such as bridge deck overlay or in repairing and retrofitting existing concrete elements in buildings and bridges. One important property to achieve composite action between two concrete segments is ''interface shear strength," which should be sufficient enough to prevent any excessive sliding...
Article
Casting concrete at different ages for new construction and repairing or retrofitting concrete structures requires a sufficient bond between concrete casts. The bond strength between different casts is attributed to surface roughness. Surface roughness can be achieved in many ways, such as water‐jetting or sandblasting. To evaluate the degree of su...
Experiment Findings
https://search.datacite.org/works/10.4231/D33B5W88M
Article
A new superstructure to pier connection for simple for dead load and continuous for live load (SDCL) steel bridge system in seismic areas was developed. As proof of concept, component level and system level tests were carried out on scale models. The component test was conducted under cyclic loading and the results showed satisfactory performance c...
Article
Full-text available
Ultra-High Performance Concrete (UHPC) has been a material of interest for retrofitting reinforced concrete elements because of its pioneer mechanical and material properties. Numerous experimental studies for retrofitting concrete structures have shown an improvement in durability performance and structural behaviour. However, conservative and som...
Article
Full-text available
Ultra-high performance concrete (UHPC) is a durable material that can be used in constructing new and unique structural elements. This research utilizes UHPC to construct prefabricated shells that act as stay-in-place forms for bridge columns and eliminate the use of traditional formwork. These innovative structural elements reduce the on-site cons...
Article
Full-text available
Closure joints are commonly used in bridge deck to connect two adjacent prefabricated elements in accelerated bridge construction. The current practice of closure joints utilizes the use of different materials such as normal strength concrete and ultra-high performance concrete with the use of different reinforcement details such as straight bars,...
Conference Paper
Full-text available
Accelerated bridge construction (ABC) techniques are used worldwide to accelerate construction and reduce cost. Precast concrete bridge deck panels are used today as part of ABC to simplify bridge deck construction. When used, bridge deck closure joints are created between the precast panels, as shown in Figure 1. Flowable yet very strong concrete...
Article
Exposing bridge elements to severe environmental conditions causes a reduction in service life and durability which demands repair or total replacement. Different strategies for repair and retrofit can be chosen. These strategies include patching, crack repairs, concrete sealers, a protective layer made of concrete or steel. Ultra-high performance...
Article
Full-text available
Educational approaches in structural engineering have focused on classical methods for solving problems with manual calculations through assignments, quizzes, and exams. The use of computational software to apply the learned knowledge has been ignored for decades. This paper describes an educational approach to tackle the lack of applicable practic...
Technical Report
The ABC-UTC Guide for Service Life Design of Longitudinal Deck Closure Joints is a customized version of “Bridges for Service Life beyond 100 Years: Innovative Systems, Subsystems and Components” and devoted to service life design of closure joints. The design for service life is gaining more importance, as limited resources demand to enhance ser...
Technical Report
Full-text available
This report summarizes the work activities undertaken in the study and presents the results of those activities toward development of this ABC-UTC Guide for Superstructure to Pier Connection in Simple for Dead-load Continuous for Live-load (SDCL) Steel Bridge Systems. The information will be of interest to highway officials, bridge construction, sa...
Article
Full-text available
Prefabricated concrete bridge deck panels are utilized in Accelerated Bridge Construction (ABC) to simplify bridge deck construction. Concrete with good bond and shear strength as well as excellent flowability is required to fill bridge deck closure joints. This paper discusses the use of polymer concrete (PC) for bridge deck closure joints in ABC....
Article
Full-text available
Ultra-high performance concrete (UHPC) is a durable material that allows the construction of innovative structural elements and conforms with accelerated bridge construction (ABC) goals. The main idea of this research is to utilize UHPC to prefabricate a shell that acts as a stay-in-place form for bridge columns. The prefabricated shell eliminates...
Article
In high-performance bridge systems that inhibit concrete spalling in the columns, bar buckling is suppressed, and bar fracture is delayed. However, bar fracture can still occur due to low-cycle, axial fatigue. If bar fractures cannot be identified visually, a method is needed to identify these fractures indirectly to ensure that the bridge can rema...
Conference Paper
A new precast bridge bent system has been developed that accelerates on-site construction activities, minimizes residual displacements even after large seismic events and reduces post-earthquake damage. The connections are the key to the system’s seismic performance. They were tested under quasi-static conditions and found to perform exceptionally...
Conference Paper
A two-span, quarter-scale, precast concrete bridge with pretensioned rocking columns was tested on the shaking tables at the University of Nevada, Reno in 2014. The columns were designed with partially unbonded strands to provide re-centering; locally debonded reinforcing steel to delay bar fracture; and confining steel tubes at their ends to prote...
Thesis
Full-text available
The seismic performance of a new bridge system is studied, tested and improved. The new bridge system: 1) reduces onsite construction time by using precast components, 2) eliminates major earthquake damage by utilizing rocking column and confinement of the column ends with a steel tube, and 3) maintains the system functionality after a strong earth...
Article
A new bridge system has been developed to (1) reduce on-site construction time by using precast components, (2) eliminate major earthquake damage by utilizing column rocking and confinement of the column ends with a steel tube, and (3) maintain the system functionality after a strong earthquake by minimizing residual drift through the use of preten...
Article
A new bridge bent system has been developed to reduce on-site construction time, minimize residual displacements even after a large earthquake, and reduce seismic damage in comparison with conventional cast-in-place construction. Accelerated construction is achieved through the use of precast columns and cap beams that can be assembled quickly. Pos...
Conference Paper
Full-text available
This paper describes the verification by shake table testing of a bridge bent system that was designed to be rapidly constructible and to provide superior seismic performance through re-centering and reduction of damage. The system used precast concrete elements, and the re-centering was achieved by means of unbonded pre-tensioning in the columns....
Article
Full-text available
A new, rocking, pre-tensioned concrete bridge bent system has been developed that reduces on-site construction time by precasting the beams and columns, minimizes post-earthquake residual displacements by the use of locally unbonded, pre-tensioned strands in the columns, and reduces earthquake damage by means of rocking connections at the ends of t...
Conference Paper
Full-text available
A new, rocking, pre-tensioned bridge bent system has been developed that 1) reduces construction time by precasting the beams and columns, 2) minimizes post-earthquake residual displacements by incorporating unbonded, pre-tensioned strands in the columns, and 3) reduces earthquake damage with rocking connections at the ends of the columns. Cyclic t...

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Cited By

Projects

Projects (9)
Archived project
This research investigates a system to simultaneously achieve three major advances in the design and construction of bridge bents: improved seismic performance, faster on-site construction, and better long-term durability. First, the seismic performance will be addressed through the use of unbonded pre-tensioned columns, with the goal of re-centering the bridge after an earthquake. Second, the faster on-site construction is to be achieved through the use of pre-fabrication, which typically goes hand-in-hand with pre-tensioning. Connection details are critical, but basic configurations for them have already been developed. Third, the long-term durability is to be addressed by the use of high performance materials (hybrid fiber-reinforced concrete (HyFRC), stainless steel bars, and epoxy-coated strands) in key areas. Pilot studies have already been conducted and have shown that the system possesses the desired fundamental characteristics and has the potential to deliver the anticipated benefits. However, key aspects of the system need to be investigated, and numerical models need to be developed to investigate its dynamic performance under a wide variety of conditions. This research is a collaboration among the University of Washington, University of California at Berkeley, and University of Nevada, Reno. The testing of a two-span bridge designed with this new system will be conducted using the George E. Brown, Jr. Network for Earthquake Engineering Simulation (NEES) shake table facility at the University of Nevada, Reno. Data from this project will be archived and made available to the public through the NEES Project Warehouse data repository at http://www.nees.org. This project aims to break the limitation of achieving two out of the three long-standing "better, faster, cheaper" paradigm by providing three simultaneous improvements to the way that bridges are designed and built in seismic areas. The "better" aspect is provided by building upon basic technology that has been proven for buildings and was used to resist the seismic loads in a 40-story concrete building in San Francisco, among others. Pre-tensioning is being adapted for use in bridges, where it is being supplemented and optimized by the strategic inclusion in key regions of high performance materials, such as stainless steel and fiber-reinforced concrete, which are both selected for their toughness. Those materials will provide a quantum improvement in the response to earthquake motions by ensuring that bridges re-align properly and are open to traffic, including emergency response vehicles, immediately after an earthquake, and also by providing better long-term durability than is possible with conventional materials. The "faster" is achieved by the use of carefully designed pre-fabrication, which means that many components can be made off site and connected together rapidly on site. The connections must be easy to assemble but highly resistant to earthquake forces. Achieving those two goals together is challenging, but is possible due to the innovative configuration of the system. The "cheaper" is expected to follow from the significant reduction in construction time. Preliminary studies on individual aspects of the system have already shown their viability. This study focuses on the whole system, to optimize the arrangement and details of its components, and to create the mathematical models needed by engineers to design it in practice to reduce the cost of rebuilding the nation's aging bridge infrastructure. This award is part of the National Earthquake Hazards Reduction Program (NEHRP). https://www.nsf.gov/awardsearch/showAward?AWD_ID=1207903
Project
This research project fills the gap by, at first glance, seeking to identify the contributing factors that affect the severity of work zone crashes associated with worker presence and crash frequency at construction work zone locations. Then, provides quantitative evidence of how much benefits can be obtained through the ABC implementation as compared with conventional on-site bridge construction from roadway safety points of view.
Project
The proposed research is the second phase of the Cycle 2 project “Robotics and Automation in ABC Projects: Exploratory Phase- ABC-UTC-2016-C2-FIU05”. In the exploratory phase, the PIs are identifying suitable materials, ultra-high performance concrete”, suitable robotic systems “mobile robot and 3d-printing system”, and suitable prefabricated bridge elements “UHPC shells for bridge columns and beams