Shear Behavior of Reinforced Concrete Structural Walls Subjected to Eccentric Axial Compression

The purpose of this study was to experimentally evaluate the effect of a hinged steel damping system on the shear behavior of a nonductile reinforced concrete frame with an opening. For the experimental test, a total of three full-scale reinforced concrete frame specimens were planned, based on the “no retrofitting” (NR) specimens with non-seismic details. The main research questions were whether the hinged steel damping system is reinforced and whether torsion springs are installed in the hinged steel damping system. From the results of the experiment, the hinged steel damping system (DR specimen) was found to be effective in seismic retrofitting, while isolating the opening of the reinforced concrete (RC) frame, and the torsion spring installed at the hinged connection (DSR specimen) was evaluated to be effective in controlling the amount of deformation of the upper and lower dampers. The strength, stiffness, and energy dissipation capacity of the DSR specimen were slightly improved compared to the DR specimen, and it was confirmed that stress redistribution was induced by the rotational stiffness of the torsion spring installed in the hinge connection between the upper and lower frames.

Download Full-text

A Computational Study of the Shear Behavior of Reinforced Concrete Beams Affected from Alkali–Silica Reactivity Damage

Materials ◽

10.3390/ma14123346 ◽

2021 ◽

Vol 14 (12) ◽

pp. 3346

Author(s):

Bora Gencturk ◽

Hadi Aryan ◽

Mohammad Hanifehzadeh ◽

Clotilde Chambreuil ◽

Jianqiang Wei

Keyword(s):

Finite Element ◽

Reinforced Concrete ◽

Parametric Study ◽

Computational Study ◽

Element Model ◽

Shear Behavior ◽

Shear Capacity ◽

Reinforced Concrete Beams ◽

Alkali Silica Reactivity ◽

Concrete Mechanical Properties

In this study, an investigation of the shear behavior of full-scale reinforced concrete (RC) beams affected from alkali–silica reactivity damage is presented. A detailed finite element model (FEM) was developed and validated with data obtained from the experiments using several metrics, including a force–deformation curve, rebar strains, and crack maps and width. The validated FEM was used in a parametric study to investigate the potential impact of alkali–silica reactivity (ASR) degradation on the shear capacity of the beam. Degradations of concrete mechanical properties were correlated with ASR expansion using material test data and implemented in the FEM for different expansions. The finite element (FE) analysis provided a better understanding of the failure mechanism of ASR-affected RC beam and degradation in the capacity as a function of the ASR expansion. The parametric study using the FEM showed 6%, 19%, and 25% reduction in the shear capacity of the beam, respectively, affected from 0.2%, 0.4%, and 0.6% of ASR-induced expansion.

Download Full-text

Corrosion Cracking Performance of Corrosion Resistant Steel Bars and Carbon Reinforced Concrete Columns under Axial Compression

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1315/719/2/022102 ◽

2021 ◽

Vol 719 (2) ◽

pp. 022102

Author(s):

Xiaoping Zhong ◽

Lange Peng ◽

Renli Dai ◽

Chengbin Yuan

Keyword(s):

Reinforced Concrete ◽

Axial Compression ◽

Concrete Columns ◽

Corrosion Cracking ◽

Corrosion Resistant Steel ◽

Resistant Steel ◽

Reinforced Concrete Columns ◽

Corrosion Resistant ◽

Steel Bars ◽

Cracking Performance

Download Full-text

Crack damage mitigation and shear behavior of shear-dominant reinforced concrete beams repaired with strain-hardening cement-based composite

Composites Part B Engineering ◽

10.1016/j.compositesb.2015.04.020 ◽

2015 ◽

Vol 79 ◽

pp. 6-19 ◽

Cited By ~ 19

Author(s):

Sun-Woo Kim ◽

Wan-Shin Park ◽

Young-Il Jang ◽

Luciano Feo ◽

Hyun-Do Yun

Keyword(s):

Reinforced Concrete ◽

Strain Hardening ◽

Concrete Beams ◽

Shear Behavior ◽

Reinforced Concrete Beams ◽

Damage Mitigation

Download Full-text

A combined experimental and numerical analysis on the seismic behavior of short reinforced concrete columns with different structural sizes and axial compression ratios

International Journal of Damage Mechanics ◽

10.1177/1056789517735679 ◽

2017 ◽

Vol 27 (9) ◽

pp. 1416-1447 ◽

Cited By ~ 15

Author(s):

Liu Jin ◽

Shuai Zhang ◽

Dong Li ◽

Haibin Xu ◽

Xiuli Du ◽

...

Keyword(s):

Reinforced Concrete ◽

Energy Dissipation ◽

Axial Compression ◽

Seismic Behavior ◽

Load Capacity ◽

Concrete Columns ◽

Simulation Method ◽

Reinforced Concrete Columns ◽

Mesoscopic Simulation ◽

Energy Dissipation Capacity

The results of an experimental program on eight short reinforced concrete columns having different structural sizes and axial compression ratios subjected to monotonic/cyclic lateral loading were reported. A 3D mesoscopic simulation method for the analysis of mechanical properties of reinforced concrete members was established, and then it was utilized as an important supplement and extension of the traditional experimental method. Lots of numerical trials, based on the restricted experimental results and the proposed 3D mesoscopic simulation method, were carried out to sufficiently evaluate the seismic performances of short reinforced concrete columns with different structural sizes and axial compression ratios. The test results indicate that (1) the failure pattern of reinforced concrete columns can be significantly affected by the shear-span ratio; (2) increasing the axial compression ratio could improve the load capacity of the reinforced concrete column, but the deformation capacity would be restricted and the failure mode would be more brittle, consequently the energy dissipation capacity could be deteriorated; and (3) the load capacity, the displacement ductility, and the energy dissipation capacity of the short reinforced concrete columns all exhibit clear size effect, namely, the size effect could significantly affect the seismic behavior of reinforced concrete columns.

Download Full-text