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Abstract
This paper reviews some experimental and numerical results about the hollow reinforced concrete beams (HRCB). Any subtraction in concrete quantity within the structural members without a considerable lack in load carrying capacity represents a common research trend nowadays due to the decrease in sections dimensions, reinforcing steel and lateral inertia forces in severe earthquakes as well as the sustainability gain for the resulting inhibiting of CO2 emission. In addition, the possibility of passing the electrical and mechanical facilities comprises another good feature of such type of structural members. During the traditional beam design process, the tension concrete is considered as strain transfer agent and do not have any role for structural resistance. As a result, longitudinal holes can be made within this area to produce the hollow reinforced concrete beams (HRCB). In this paper some remarkable research works are summarized with the most important conclusions within this field.
Highlights
As a matter of fact, concrete has a relatively high specific gravity, as a consequence, most of the dead weight that carried by the reinforced concrete structural member is the self-weight
This study introduces a brief review about the past experience studies which included such type of beams
The following conclusions can briefly summarize as bellow: 1. In general, the presence of longitudinal holes within the reinforced concrete section causes a conseuent increase in flexural performance
Summary
As a matter of fact, concrete has a relatively high specific gravity, as a consequence, most of the dead weight that carried by the reinforced concrete structural member is the self-weight This represents a rather bulky and heavy loads to the foundations. The facility functional performance and users’ comfort of many services within civil engineering projects require engineering divisions Such divisions are usually containing ducts, pipes and wires which are of plumbing, electrical and cooling / heating systems. 2. Research significance The proper implementation of hollow reinforced concrete beams is a very important issue in the civil engineering construction for both strength and service ability requirements, increasing the reliable experimental experience about such type of structural members is very useful and justified. Designers, organizations and authors are still having many reasons to understand the performance of such type of beams, this study attempts to view the current state of art about this field
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