Structural behavior of reinforced concrete pre-stressed tapered beams

Q1 Engineering

Periodicals of Engineering and Natural Sciences Pub Date : 2023-02-28 DOI:10.21533/pen.v11i1.3460

Mohammed Dhaher Jasim, H. T. Nimnim

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Abstract

This research is focused on studying the flexural behavior of reinforced concrete prestressed (post-tensioned) tapered beams. The present study investigates the impact of compressive strength, prestressed reinforcement, and tapering ratio on flexural behavior. All tested beams have a total length equal to (2600mm) and a clear distance between supports equal to (2400mm), the width of the beam (250mm), and maintain the same amount of concrete volume. The experimental results showed that when a prestressed reinforcement changes from (one strand) for (two strands), this change will affect the prismatic beam, in which the first cracking and the ultimate load will be raised by (60% and 31.71%), respectively, and for a non-prismatic beam with tapering ratios of (1.5 and 2), the first cracking will increase by (12.5% and 2.63%) also the maximum load raised by (28.3% and 31.03%). The failure mode was flexural for all tested beams with crushing in the compression zone. This paper simulated a numerical analysis of experimentally tested specimens using a nonlinear finite element technique (ABAQUS/CAE 2021 software). The numerical outcomes revealed a good correlation compared with the results of the experimental study.

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钢筋混凝土预应力锥形梁的结构性能

本研究的重点是研究钢筋混凝土预应力（后张）锥形梁的受弯性能。本研究调查了抗压强度、预应力钢筋和锥形比对弯曲性能的影响。所有测试梁的总长度等于（2600mm），支架之间的净距离等于（2400mm），梁的宽度为（250mm），并保持相同的混凝土体积。实验结果表明，当预应力钢筋从（一股）变为（两股）时，这种变化将影响棱柱梁，其中第一次开裂和极限荷载将分别提高（60%和31.71%），而对于锥形比为（1.5和2）的非棱柱梁，第一次开裂增加12.5%和2.63%，最大荷载增加28.3%和31.03%。本文使用非线性有限元技术（ABAQUS/neneneba CAE 2021软件）模拟了实验测试样本的数值分析。数值结果显示，与实验研究的结果相比，具有良好的相关性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Periodicals of Engineering and Natural Sciences Engineering-Architecture

CiteScore

1.90

自引率

0.00%

发文量

140

审稿时长

7 weeks

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