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Experimental study on wall-frame connection of confined masonry wall
Wijaya W.a, Kusumastuti D.a, Suarjana M.a, Rildovaa, Pribadi K.a
a Faculty of Civil and Environmental Engineering, Institute of Technology, Indonesia
[vc_row][vc_column][vc_row_inner][vc_column_inner][vc_separator css=”.vc_custom_1624529070653{padding-top: 30px !important;padding-bottom: 30px !important;}”][/vc_column_inner][/vc_row_inner][vc_row_inner layout=”boxed”][vc_column_inner width=”3/4″ css=”.vc_custom_1624695412187{border-right-width: 1px !important;border-right-color: #dddddd !important;border-right-style: solid !important;border-radius: 1px !important;}”][vc_empty_space][megatron_heading title=”Abstract” size=”size-sm” text_align=”text-left”][vc_column_text]Four full-scale (3m × 3m) confined masonry wall specimens that represented simple house wall panels in Indonesia were subjected to cyclic in-plane lateral load. The construction of the specimens, including reinforcement assemblies, concreting, and brick-laying, followed the common construction practice in Indonesia. A specimen with no anchorage between the wall and the reinforced concrete frame was chosen as a benchmark model. The other specimens were varied in the details of wall-frame connection, i.e. zigzag (toothing) connection, short anchor between column and wall, and continuous anchorage from column to column. The models were then subjected to cyclic in-plane lateral loads, which represents earthquake loads, with increasing amplitude until collapsed. The behavior of these specimens was then evaluated and compared. The parameters evaluated were crack patterns and failure mechanism of the wall panel, loading capacity, and energy dissipation. The study revealed that zigzag connection and short anchor did not improve the performance of the confined masonry wall; instead they were more likely to reduce the performance of the wall. Cracks and failures of the two specimens were initiated by vertical crack on the face of the wall-frame connection, which then reduced the confinement of the wall. Therefore, the final failure mode followed sliding shear patterns on the bed joint of brick-mortar, which produced more brittle failure. Conversely, continuous anchorage strengthened the confinement, thus the diagonal crack patterns were observed on the wall and the strut and tie mechanism between the wall and the confining column was developed. Therefore, this specimen shows more ductile behavior as well as higher lateral load capacity. In conclusion, the study shows that installing proper wall-frame connection strategies is crucial in improving the structural performance.[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Author keywords” size=”size-sm” text_align=”text-left”][vc_column_text]Benchmark models,Brittle failures,Collapse mechanism,Confined masonry walls,Construction practice,Crack patterns,Ductile behavior,Earthquake load,Experimental studies,Failure mechanism,Final failures,In-plane,Indonesia,Lateral load capacity,Lateral loads,Loading capacities,Reinforced concrete frames,Structural performance,Strut-and-tie,Vertical crack,Wall panels,Wall-frame connections[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Indexed keywords” size=”size-sm” text_align=”text-left”][vc_column_text]Collapse mechanism,Confined masonry wall,Wall-frame connections[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Funding details” size=”size-sm” text_align=”text-left”][vc_column_text]The study is partially supported by the Directorate General of Higher Education, Ministry of National Education through Research Competitive Grant Program Batch I No. 164/SP2H/PP/DP2M/V/2009 and “Collaborative Research in Feasible and Affordable Seismic Construction” conducted by Center for Disaster Mitigation, Institute of Technology Bandung (CDM ITB, Indonesia), Research Institute for Human Settlement (RIHS, Indonesia), and Building Research Institute (BRI, Japan). The supports are gratefully acknowledged.[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”DOI” size=”size-sm” text_align=”text-left”][vc_column_text]https://doi.org/10.1016/j.proeng.2011.07.263[/vc_column_text][/vc_column_inner][vc_column_inner width=”1/4″][vc_column_text]Widget Plumx[/vc_column_text][/vc_column_inner][/vc_row_inner][/vc_column][/vc_row][vc_row][vc_column][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][/vc_column][/vc_row]