Experiments on Symmetrically Reduced Reinforced Concrete Beams
Experiments on Symmetrically Reduced Reinforced Concrete Beams
复制标题
对称减径钢筋混凝土梁试验
DOI：
10.1007/s40799-016-0161-2
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发表时间：
2017
影响因子：
1.6
通讯作者：
Winkler
中科院分区：
文献类型：
--
作者：
Winkler
随着实现更大、更厚和更宽跨度的结构钢筋混凝土构件的竞争的继续，出现了关于这些大型结构构件的安全性和经济质量的问题，这意味着显著的尺寸效应。由于有关的实验基础设施的限制，并由于突出的时间和材料消耗的努力所产生的经济原因，有一个显着缺乏的实验结果，特别是关于钢筋混凝土构件与大的有效深度。在鲁尔大学波鸿的混凝土结构研究所，开发了一种创新的实验测试装置，以使更大的钢筋混凝土构件的尺寸效应调查的多重要求。它侧重于利用加载和测试构件的对称条件，可与数值研究中离散化过程的最佳实践相媲美。因此，梁被一分为二，板被四分之一。与对称等级成比例的试验载荷和恒载显著降低，从而在给定的试验设施内产生更大的试样。最初设计和配置用于测试厚钢筋混凝土板的冲切破坏，该装置还可以测试对称截面的混凝土构件，如弯曲或剪切加载的单跨梁。贡献提出了一个单一的步骤的发展，测试对称平分钢筋混凝土梁，包括模块化轴承结构与滑动平面和回锚的弯曲钢筋，以及混凝土试样本身的互连的对称平面，测量技术和其特定的组件。对半梁和相应的全尺寸构件的验证试验结果的比较显示了显着的一致性，并证明了破坏模式，裂缝模式，屈服和破坏荷载的普遍适用性。图形摘要概述利用对称性约简的创新实验概念：问题陈述和开发过程的有条不紊的约简
As the competition on realizing larger, thicker and more wide-spanned structural reinforced concrete members continues, questions arise concerning the safety and economic quality of these large structural members implying significant size effects. Due to limitations concerning the experimental infrastructure and due to economic reasons resulting from outstanding time- and material-consuming efforts, there is a remarkable lack of experimental results especially concerning reinforced concrete members with large effective depths. At the Institute of Concrete Structures at the Ruhr-Universität Bochum, an innovative experimental test setup is developed to enable the multiply requested size effect investigations of larger reinforced concrete members. It focuses on utilizing the symmetry conditions of loading and test members, comparable to the best practice of the discretization procedure in numerical investigations. Thus, beams are halved and slabs quartered. Proportional to the symmetry grade test loads and dead loads pronouncedly decrease giving rise to larger specimen within given testing facilities. Initially designed and configured for testing the punching shear failure of thick reinforced concrete slabs, the setup also enables tests on symmetrically sectioned concrete members like single-span beams loaded in bending or shear. The contribution presents the single steps of the development to test symmetrically bisected reinforced concrete beams, including the modular bearing constructions with sliding planes and back anchorings of the bending reinforcement as well as the concrete specimen itself with interconnections to the symmetry planes, measuring techniques and its specific assembly. The comparison of the results of verification tests on halved beams and corresponding full-size members shows a remarkable accordance and proofs the general applicability in failure modes, crack pattern, yielding and failure loads.Graphical AbstractOverview on the innovative experimental concept utilizing symmetry reductions: methodical reduction of problem statement and development process