Experimental and Theoretical Research on Shear Strength of Seismic‐Damaged SRC Frame Columns Strengthened with Enveloped Steel Jackets

Abstract

The experimental and shear strength analytical investigations carried out on seismic-damaged steel reinforced concrete (SRC) columns strengthened with enveloped steel jacket subjected to cyclic loading are presented in this paper. Four 1/2-scale SRC columns were designed and manufactured and the postearthquake damage, enveloped steel jacket-confined, and destructive tests were carried out under lateral cyclic loading. The effects of postearthquake damage degree and enveloped steel jacket-confined on shear capacity and ductility capacity were all well examined. Test results indicate that the ductility of seismic-damaged SRC columns strengthened with enveloped steel jacket increases with the reduction of the postearthquake damage degree. The results indicate that the calculation formula of shear bearing capacity of SRC columns is feasible. Based on GB50010-2010, ACI318-08, and CSA-04, three different shear models were established, and the calculated values of shear capacity are quite different, and the analysis of the shear strength of RC in the strengthened seismic-damaged SRC column cannot be ignored. The formula is verified, and the calculated results are consistent well with the experimental results.

Mapping pre and post earthquake land cover change in Melangkap, Kota Belud Sabah using multi-temporal satellite Landsat 8/OLI and Sentinel 2 Imagery

“…The earthquake creates a large mudslide which generated from the drifted big rubbles, trees and sediments that damage the 1053 (2022) 012024 IOP Publishing doi:10.1088/1755-1315/1053/1/012024 2 properties of the existing landscape. The earthquake increases the weakening and withstanding of the rocks and soil corpus which will trigger the failure of the landscape structure to sustain in its current condition [7,8,9]. The change in landscape dynamics following the earthquake is poorly understood [9].…”

“…The earthquake increases the weakening and withstanding of the rocks and soil corpus which will trigger the failure of the landscape structure to sustain in its current condition [7,8,9]. The change in landscape dynamics following the earthquake is poorly understood [9]. Various processes, such as the progressive depletion of the debris, restoration of the vegetation cover and bedrock healing have been shown to play a role [9,10,11].…”

“…The change in landscape dynamics following the earthquake is poorly understood [9]. Various processes, such as the progressive depletion of the debris, restoration of the vegetation cover and bedrock healing have been shown to play a role [9,10,11]. Observation on the landscape change soon after earthquake can reveal the major effect rates on the affected area [11].…”

Seismic Performances of SRC Special-Shaped Columns and RC Beam Joints Under Double-Direction Low-Cyclic Reversed Loading

“…In order to assess the seismic and hysteresis behavior of structural joints, cyclic loading tests are considered to be an effective method in a range of studies (Karabinis, 2002;Chun et al, 2007;Said, 2009;Sasmal et al, 2010;Metelli et al, 2015). Many researchers have now carried out cyclic loading test studies for reinforced concrete T-columns with reinforced concrete beams (Xiang et al, 2017), strand-inserted precast concrete beam and column joints (Yu et al, 2020), non-coreanchored concrete-encased CFST wall and RC coupling beam joints (Zhou et al, 2020), concrete-encased steel column and steel beam joints (Chu et al, 2018), steel truss-reinforced composite joints (Deng et al, 2018a), and a range of other combined structures (Chen et al, 2015a;Chen et al, 2015b;Xu et al, 2019).…”

Investigation on Shear Capacity of Joints between Steel Reinforced Concrete Special-Shaped Column and Reinforced Concrete Beam

“…Comparing steel reinforced concrete (SRC) and normal RC, the SRC column structure has more advantages due to its high strength (Chen et al, 2020;He et al, 2019) and shear capacity (Xu et al, 2019;Jiang and Bai, 2020;Zhao, 2020). In recent decades, the SRC structure has been attracting the attention of engineering circles and is being generally promoted in the construction of high structures around the world (Wang et al, 2020).…”