Reinforced Concrete Coupling Beams with High-Strength Steel Bars

The use of high-strength steel bars in reinforced concrete coupling beams has the potential to reduce reinforcement congestion and support more efficient design and construction methods. A series of tests was conducted to investigate the effects of high-strength reinforcement on coupling beam behavior.

Eleven large-scale coupling beam specimens were tested under fully reversed cyclic displacements of increasing magnitude. The main variables of the test program included: yield stress of the primary longitudinal reinforcement (Grades 80, 100, and 120 [550, 690, and 830]), span-to-depth (aspect) ratio (1.5, 2.5, and 3.5), and layout of the primary longitudinal reinforcement (diagonal [D] and parallel [P]). All beams had the same nominal concrete compressive strength (8,000 psi [55 MPa]) and cross-sectional dimensions (12 by 18 in. [310 by 460 mm]). Beams were designed for target shear stresses of 8√𝑓'𝑐 psi (0.67√𝑓'𝑐 MPa) for D-type beams and 6√𝑓'𝑐 psi (0.5√𝑓'𝑐 MPa) for P-type beams. Transverse reinforcement was Grade 80 (550) in all but one beam, which had Grade 120 (830) reinforcement.

The test program is documented by presenting the details of specimen construction, test setup, instrumentation, and loading protocol. Documentation of test data includes material properties, cyclic force-deformation response, progression of damage, calculated and measured strengths, initial stiffness, and measured reinforcement strains. Analysis of test data includes hysteretic energy, changes in beam length and depth, components of chord rotation, and the development of an equation for estimating chord rotation capacity.

These data were recorded as part of the following research project:
Weber-Kamin, A. S., Lequesne, R. D., and Lepage, A., “Reinforced Concrete Coupling Beams with High-Strength Steel Bars,” SM Report No. 143, The University of Kansas Center for Research, Inc., Lawrence, KS, August 2020, 598 pp.

https://iri.ku.edu/sites/iri.ku.edu/files/files/pdf/publications/reports/SM143.pdf

http://hdl.handle.net/1808/30647

在钢筋混凝土连梁（reinforced concrete coupling beams）中采用高强度钢筋，有望减少钢筋排布拥堵，支撑更高效的设计与施工方法。本研究开展了一系列试验，以探究高强度配筋对连梁力学性能的影响。

本次试验共制作11个大尺寸连梁试件，在逐级增大的完全反向循环位移下进行加载。试验的主要变量包括：主要纵向钢筋的屈服强度（80级、100级、120级[对应550、690、830MPa]）、跨高比（span-to-depth (aspect) ratio，1.5、2.5、3.5）以及主要纵向钢筋的布置形式（斜向配筋[D型]和平行配筋[P型]）。所有试件的名义混凝土抗压强度均为8000 psi [55 MPa]，截面尺寸统一为12×18英寸[310×460 mm]。针对两类配筋形式的连梁，分别设计了目标剪应力：D型梁为8√𝑓'𝑐 psi（0.67√𝑓'𝑐 MPa），P型梁为6√𝑓'𝑐 psi（0.5√𝑓'𝑐 MPa）。除1根试件外，其余所有试件的横向配筋均为80级（550MPa）钢筋，仅该试件采用了120级（830MPa）横向钢筋。

本试验项目通过展示试件制作细节、试验装置、测量仪器及加载规程进行完整记录。试验数据涵盖材料性能、循环力-变形响应、损伤发展过程、计算与实测强度、初始刚度以及实测钢筋应变。对试验数据的分析包括滞回耗能（hysteretic energy）、梁长与梁高的变化、弦转角（chord rotation）分量，并推导得到用于预估弦转角能力的计算公式。

本数据集源自下述研究项目：
Weber-Kamin, A. S., Lequesne, R. D., 及Lepage, A., 《配有高强度钢筋的钢筋混凝土连梁》，堪萨斯大学研究中心SM报告第143号，劳伦斯，堪萨斯州，2020年8月，共598页。
https://iri.ku.edu/sites/iri.ku.edu/files/files/pdf/publications/reports/SM143.pdf
http://hdl.handle.net/1808/30647

搜集汇总

背景与挑战

背景概述

该数据集聚焦于高强度钢筋在钢筋混凝土耦合梁中的应用研究，通过11个大型样本的循环位移测试，探讨了钢筋屈服应力、跨高比和布局等变量对梁行为的影响。数据集包含详细的实验设置、材料性能、力-变形响应和损伤进展记录，旨在支持更高效的设计和施工方法，并源自2020年的学术报告。