Papers by Mohamed Aboelseoud
This project involves the field evaluation of three Hybrid-Composite Girder Bridges in Missouri, ... more This project involves the field evaluation of three Hybrid-Composite Girder Bridges in Missouri, USA. These hybrid composite beams (HCB)s are comprised of three main subcomponents: a composite shell, compression reinforcement, and tension reinforcement. The shell is comprised of a fiber reinforced polymer (FRP) box beam. The compression reinforcement consists of self-consolidating concrete (SCC) which is pumped into a profiled conduit within the shell. The tension reinforcement consists of galvanized steel tendons anchored at the compression reinforcement ends. Due to the novelty of the HCB and its unclear behavior, an integrated study is under implementation to evaluate the recently constructed hybrid bridge superstructures. To achieve the goals of this study, a series of load tests was applied to the three bridges and the HCBs deflections were measured. HCB elements have been instrumented with various sensors and the induced strains were recorded at several stages and under the applied test loads. Finite element (FE) models were constructed via ANSYS 13.0 and SAP2000 14.2 commercial softwares. Mathematical calculations were performed to predict the deflections and the strains using the existing design methodology. The study showed that the new HCB is a promising technique in the bridge applications. The HCB unique configuration optimizes its performance and leads to lightweight, cost-effective, and durable member. The existing design procedure is simple and suites the bridge designers. However, it needs some refinements. This paper presents briefly the work achieved to date and highlights the concluded remarks. The fabrication and construction sequencing of the HCB is also presented.
This project involves the field evaluation of a new hybrid composite beam (HCB) recently used to ... more This project involves the field evaluation of a new hybrid composite beam (HCB) recently used to construct three bridges in Missouri, USA. The HCB is comprised of self-consolidating concrete (SCC) that is poured into classical arch shape and tied at the ends by conventional prestressing tendons. The concrete and steel are tucked inside fiberglass shell and the voids are filled with polyisocyanurate (polyiso) foam. This paper examined the durability of a commercial GFRP laminate used to encase the HCB elements in one of the recently constructed bridges. The E-glass/vinylester laminate was subjected to two different aging regimes. The first regime consisted of continuous salt fog exposure for 3072 hr. (128 days), while the second regime included applying different levels of sustained stress along with 350 different thermal cycles in a computer-controlled environmental chamber. The thermal cycling consisted of 50 freeze-thaw cycles that simulated the winter season effects. Then, the su...
The use of "Hybrid-Composite Beam” or HCB, in the field of bridge engineering, gained a lot ... more The use of "Hybrid-Composite Beam” or HCB, in the field of bridge engineering, gained a lot of attention The HCB is made up of three main sub-components that are a composite shell, compression reinforcement, and tension reinforcement. The basic principle of HCB is it combines the strength and stiffness of conventional concrete and steel with the corrosion resistant and lightweight characteristics of advanced composite materials. Only a limited number of researchers have studied in HCB for its essential design methodologies and long-term performance.
Three hybrid composite beam (HCB) bridges were recently constructed in Missouri, USA. HCB is an i... more Three hybrid composite beam (HCB) bridges were recently constructed in Missouri, USA. HCB is an innovative idea that incorporates traditional construction materials (steel and concrete) with fiber reinforced polymer (FRP) composites in such a manner to optimize the performance of the beam constituents. The HCB consists of self-consolidating concrete (SCC) poured in classical arch shape and tied at the ends by conventional prestressing strands. The concrete and steel are tucked inside durable fiberglass shell and the voids are filled with polyiso foam. An integrated study was implemented on the three bridges to investigate the HCB in-service behavior. The study included quality control/quality assurance (QC/QA) testing program. As a part of this research study, an innovative infrared (IR) thermal imaging approach was developed to detect the voids in the concrete arch section during its casting. The approach is found to be an ideal solution for QC/QA of the concrete arch concrete plac...
Journal of Composites for Construction
Advances in Materials Science and Engineering
A new hybrid composite beam (HCB) has recently been used in the construction of three bridges in ... more A new hybrid composite beam (HCB) has recently been used in the construction of three bridges in Missouri, USA. HCB consists of self-consolidating concrete (SCC) that is poured into classical arch shape and tied at the ends by steel tendons. Both the concrete and the steel are tucked inside a durable fiberglass shell, and the voids are filled with polyiso foam. This paper aims to examine the flexural behavior of an in-service HCB, evaluate the current methodology and assumptions, and propose modifications to that methodology. To achieve these goals, the strains induced in HCB elements due to different loading stages were experimentally measured. Numerical predictions of the strains were performed via the existing methodology, the modified procedure, and a finite element model (FEM) that was constructed using ANSYS V14. The linear FEM predicted the strains with acceptable accuracy. The model clarified that the foam achieves partial composite action between the HCB elements, resulting...
Advances in Materials Science and Engineering
A new hybrid composite beam (HCB) has recently been used in the construction of three bridges in ... more A new hybrid composite beam (HCB) has recently been used in the construction of three bridges in Missouri, USA. HCB consists of self-consolidating concrete (SCC) that is poured into classical arch shape and tied at the ends by steel tendons. Both the concrete and the steel are tucked inside a durable fiberglass shell, and the voids are filled with polyiso foam. This paper aims to examine the flexural behavior of an in-service HCB, evaluate the current methodology and assumptions, and propose modifications to that methodology. To achieve these goals, the strains induced in HCB elements due to different loading stages were experimentally measured. Numerical predictions of the strains were performed via the existing methodology, the modified procedure, and a finite element model (FEM) that was constructed using ANSYS V14. The linear FEM predicted the strains with acceptable accuracy. The model clarified that the foam achieves partial composite action between the HCB elements, resulting...
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Papers by Mohamed Aboelseoud