Download or read book Flexural and Shear Capacity of Reinforced High Strength Concrete Beams Without Stirrups written by Mikael Hallgren and published by . This book was released on 1994 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Shear critical High strength Concrete Beams written by Ashraf H. Elzanaty and published by . This book was released on 1985 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book High strength Concrete written by H. G. Russell and published by . This book was released on 1985 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Shear Capacity and Flexural Ductility of Reinforced High And Normal Strength Concrete Beams written by Md Shahidul Islam and published by Open Dissertation Press. This book was released on 2017-01-27 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Shear Capacity and Flexural Ductility of Reinforced High- and Normal-strength Concrete Beams" by Md Shahidul, Islam, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. DOI: 10.5353/th_b3121444 Subjects: Concrete beams - Testing High strength concrete - Testing Shear (Mechanics)
Download or read book Shear Capacity and Flexural Ductility of Reinforced High and Normal strength Concrete Beams written by Md. Shahidul Islam and published by . This book was released on 1996 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book ACI 318 19 Building Code Requirements for Structural Concrete ACI 318 19 and Commentary ACI 318R 19 written by ACI Committee 318 and published by . This book was released on 2019-05 with total page 624 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Response of Ultra High Performance Fiber Reinforced Concrete Beams Under Flexure and Shear written by Roya Solhmirzaei and published by . This book was released on 2021 with total page 287 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ultra high performance concrete (UHPC) is an advanced cementitious material made with low water to binder ratio and high fineness admixtures, and possesses a unique combination of superior strength, durability, corrosion resistance, and impact resistance. However, increased strength of UHPC results in a brittle behavior. To overcome this brittle behavior of UHPC and improve post cracking response of UHPC, steel fibers are often added to UHPC and this concrete type is designated as Ultra High Performance Fiber Reinforced Concrete (UHPFRC). Being a relatively new construction material, there are limited guidelines and specifications in standards and codes for the design of structural members fabricated using UHPFRC. To develop a deeper understanding on the behavior of UHPFRC flexural members, seven beams made of UHPFRC are tested under different loading conditions. The test variables include level of longitudinal reinforcement, type of loading (shear and flexure), and presence of shear reinforcement. Further, a finite element based numerical model for tracing structural behavior of UHPFRC beams is developed in ABAQUS. The developed model can account for the nonlinear material response of UHPFRC and steel reinforcement in both tension and compression, as well as bond between concrete and reinforcing steel, and can trace the detailed response of the beams in the entire range of loading. This model is validated by comparing predicted response parameters including load-deflection, load-strain, and crack propagation against experimental data obtained from tests on UHPFRC beams with different material characteristics and under different loading configurations. The validated model is applied to conduct a set of parametric studies to quantify the effect of different parameters on structural response of UHPFRC beams, including the contribution of stirrups and concrete to shear capacity of beams, to explore feasibility of removing the need for shear reinforcement in UHPFRC beams. Results from experiments and numerical model reveal that UHPFRC beams exhibit distinct cracking pattern characterized by the propagation of multiple micro cracks followed by widening of a single crack leading to failure. Also, UHPFRC beams exhibit high flexural and shear capacity, as well as ductility due to high compressive and tensile strength of UHPFRC and fiber bridging developing at the crack surfaces that leads to strain hardening in UHPFRC after cracking. Thus, absence of shear reinforcement in UHPFRC beams does not result in brittle failure, even under dominant shear loading. Data from the conducted experiments as well as those reported in literature is utilized to develop a machine learning (ML) framework for predicting structural response of UHPFRC beams. On this basis, a comprehensive database on reported tests on UHPFRC beams with different geometric, fiber properties, loading and material characteristics is collected. This database is then analyzed utilizing different ML algorithms, including support vector machine, artificial neural networks, k-nearest neighbor, support vector machine regression, and genetic programing, to develop a data-driven computational framework for predicting failure mode and flexural and shear capacity of UHPFRC beams. Predictions obtained from the proposed framework are compared against the values obtained from design equations in codes, and also results from full-scale tests to demonstrate the reliability of the proposed approach. The results clearly indicate that the proposed ML framework can effectively predict failure mode and flexural and shear capacity of UHPFRC beams with varying reinforcement detailing and configurations. The research presented in this dissertation contributes to the development of preliminary guidance on evaluating capacity of UHPFRC beams under different configurations.
Download or read book Building Code Requirements for Structural Concrete ACI 318 05 and Commentary ACI 318R 05 written by ACI Committee 318 and published by American Concrete Institute. This book was released on 2005 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Influence of Flexural Reinforcement on Shear Strength in Reinforced Concrete Beams Without Stirrups written by Heather Colleen Nelson and published by . This book was released on 2003 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: A study of reinforced concrete beams to determine if increased flexural reinforcement increases the beam's rigidity, decreases deflections, and increases the composite modulus of elasticity. Experiments showed that increased reinforcement delayed the formation of cracks and increased the shear strengths of the beams.
Download or read book Reinforced Concrete Deep Beams written by F K Kong and published by CRC Press. This book was released on 1991-05-01 with total page 305 pages. Available in PDF, EPUB and Kindle. Book excerpt: The contents of this book have been chosen with the following main aims: to review the present coverage of the major design codes and the CIRIA guide, and to explain the fundamental behaviour of deep beams; to provide information on design topics which are inadequately covered by the current codes and design manuals; and to give authoritative revie
Download or read book Shear Capacity of High Strength Prestressed Concrete Girders written by David L. Hartmann and published by . This book was released on 1988 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Flexural and Shear Performance of High Strength Lightweight Reinforced Concrete Beams written by Ahmed Naamah Almousawi and published by . This book was released on 2011 with total page 502 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Supported Beams and Slabs written by and published by . This book was released on 1989 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development of Prediction and Design Models for Wide Concrete Beams with Various Load and Support Widths written by Ayed Eid Alluqmani and published by . This book was released on 2014 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In reinforced concrete (RC) structures, wide RC beams are used as primary structural members to support floor loads and to transfer forces from the floor to the vertical elements which are below them, e.g. columns and walls. In these cases, wide concrete beams may be loaded and supported by wide columns or walls (full-width loads and supports) and/or by narrow columns (partial-width loads and supports). In both cases of support and load conditions, the one-way (beam) and two-way (punching) shear capacities should be checked for wide RC members. For both wide and narrow load/support configurations, the provisions of current design Codes require that one-way shear capacity is assessed for a cross-section involving the full width of the beam, and the contribution of shear strength resisted by stirrups is assessed according to the longitudinal stirrup-legs spacing where the transverse stirrup-legs spacing is neglected. Moreover, the current design Codes neglect the load and support widths to predict the flexural strength. The main concern is whether the requirements of current design Codes may lead to poor predictions of flexural and shear strengths of wide concrete beams, especially for narrow-supported wide beams, because they ignore the support width, load width, longitudinal and transverse spacing of stirrup-legs. The objective of this study is to develop new Prediction, Detailing and Design Models for wide reinforced concrete beams to be used in Practice. The results of 26 tests on wide RC beam specimens are reported in this study. The models were developed to account for the missed parameters mentioned above which showed an actual influence on the flexural and shear strengths of wide RC beams with full- and narrow- width loads and supports (wide- and narrow- supported wide RC beams). They take into the consideration the load- and support- widths (or at best, the ratios of load- and support- width to the beam-width). Comprehensive verifications and evaluations of the proposed models were conducted for comparing them with the existing design Codes and other proposed models. It is shown that the proposed models perform the best among the existing Codes and models. It is shown that the flexural and shear strengths decrease as the ratio of the load- and/or support- width to the beam-width decreases, while the shear strength resisted by stirrups contribution decreases as the transverse stirrup legs spacing increases. These influences occur for members with and without shear reinforcement. Based on the proposed design model, the longitudinal and transversal stirrup legs spacing are reduced as the ratio of the load- and/or support- width to the beam-width decreases, and then this will enhance to increase the shear strength; therefore, the failure mode will change from brittle to ductile manner. These influences occur for members with shear-reinforcement. For the members without shear-reinforcement, the proposed detailing approach will enhance the flexural reinforcements (tensile and compressive bars) when they are distributed according to their portions of concentrations within the effective-widths of supports and loads. For wide RC beams with and without shear-reinforcement, test results showed that the shear strength decreased as the support-width and/or load-width was reduced. In addition, for wide RC beams with shear-reinforcement, tests results showed that the shear strength decreased as the longitudinal or transverse spacing of stirrup-legs increased. The tests results also showed that the flexural strength of wide RC beams with stirrups decreased as the support-width and/or load-width was reduced. Author keywords: Wide Beams; Existing Codes and Models; Stirrup Leg Spacings; Load and Support; Proposed Prediction, Detailing and Design Models.
Download or read book The Shear Strength of Reinforced Concrete Beams written by Armas Laupa and published by . This book was released on 1953 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Shear Resistance of High Strength Concrete I Beams with Large Shear Reinforcement Ratios written by Roger Yuan Xu and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Behavior and Ultimate Strength of Rectangular Reinforced Concrete Beams in Bending and High Shear written by Zenon Albert Zielinski and published by . This book was released on 1967 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
