Seismic performance analysis of self-centering segment piers with mortise-tenon shear connectors based on cyclic pseudo-static test

In the past decades, more and more precast piers have been used in actual engineering, which brings convenience in construction and standardization of production. However, precast piers still have some shortcomings, such as shear slip between segments and poor energy dissipation. Thus, a self-center...

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Autores principales:	Yongjun Ni, Changshun Hao, Yanzhou Xu
Formato:	article
Lenguaje:	EN
Publicado:	JVE International 2021
Materias:	seismic performance assembled segment pier self-centering mortise-tenon shear connectors pseudo-static test Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/9abf66f2585b4106b392064e875a5756
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spelling	oai:doaj.org-article:9abf66f2585b4106b392064e875a57562021-11-15T19:20:56ZSeismic performance analysis of self-centering segment piers with mortise-tenon shear connectors based on cyclic pseudo-static test1392-87162538-846010.21595/jve.2021.22029https://doaj.org/article/9abf66f2585b4106b392064e875a57562021-08-01T00:00:00Zhttps://www.jvejournals.com/article/22029https://doaj.org/toc/1392-8716https://doaj.org/toc/2538-8460In the past decades, more and more precast piers have been used in actual engineering, which brings convenience in construction and standardization of production. However, precast piers still have some shortcomings, such as shear slip between segments and poor energy dissipation. Thus, a self-centering mortise-tenon segmental bridge pier was proposed in this paper. To research the seismic performance of the self-centering mortise-tenon segment piers, three scaled model piers with their scale ratio as 1:3 were designed and prefabricated, namely as a cast-in-place model pier (CP) and 2 self-centering mortise-tenon segment model piers (designated as MTSP1 and MTSP2) with the initial pretension of 1302 MPa and 1488 MPa, respectively. The cyclic pseudo-static tests of the three piers were carried out. The comparison analysis was made respecting to the test results including the damage form, hysteretic characteristics, skeleton curve, energy dissipation capacity, residual displacement and equivalent stiffness of the three specimens. It was shown that MTSP specimens had higher horizontal bearing capacity. While the yield load, ultimate load, displacement ductility coefficient and initial stiffness of MTSP1 and MTSP2 were higher than those of CP. The MTSP had better performance considering the above aspects. The mean value of the residual displacement of MTSP2 was lower than that of CP 21.14 % and 29. 72 % respectively, as the drift ratio reaching 5 %. The MTSP specimens had better self-centering capacity due to the increased pretension stress which reducing the residual displacement greatly. The energy dissipation reinforcements improved the energy dissipation capacity of the segmental assembled piers. Based on the ABAQUS model, the numerical simulation was carried out and compared with the experimental data. MTSP had great energy dissipation capacity and self-centering capacity. It was suggested that MTSP should be used to make up for the deficiency of segmental assembled pier and improve the seismic performance of segmental assembled pier.Yongjun NiChangshun HaoYanzhou XuJVE Internationalarticleseismic performanceassembled segment pierself-centeringmortise-tenon shear connectorspseudo-static testMechanical engineering and machineryTJ1-1570ENJournal of Vibroengineering, Vol 23, Iss 7, Pp 1621-1639 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	seismic performance assembled segment pier self-centering mortise-tenon shear connectors pseudo-static test Mechanical engineering and machinery TJ1-1570
spellingShingle	seismic performance assembled segment pier self-centering mortise-tenon shear connectors pseudo-static test Mechanical engineering and machinery TJ1-1570 Yongjun Ni Changshun Hao Yanzhou Xu Seismic performance analysis of self-centering segment piers with mortise-tenon shear connectors based on cyclic pseudo-static test
description	In the past decades, more and more precast piers have been used in actual engineering, which brings convenience in construction and standardization of production. However, precast piers still have some shortcomings, such as shear slip between segments and poor energy dissipation. Thus, a self-centering mortise-tenon segmental bridge pier was proposed in this paper. To research the seismic performance of the self-centering mortise-tenon segment piers, three scaled model piers with their scale ratio as 1:3 were designed and prefabricated, namely as a cast-in-place model pier (CP) and 2 self-centering mortise-tenon segment model piers (designated as MTSP1 and MTSP2) with the initial pretension of 1302 MPa and 1488 MPa, respectively. The cyclic pseudo-static tests of the three piers were carried out. The comparison analysis was made respecting to the test results including the damage form, hysteretic characteristics, skeleton curve, energy dissipation capacity, residual displacement and equivalent stiffness of the three specimens. It was shown that MTSP specimens had higher horizontal bearing capacity. While the yield load, ultimate load, displacement ductility coefficient and initial stiffness of MTSP1 and MTSP2 were higher than those of CP. The MTSP had better performance considering the above aspects. The mean value of the residual displacement of MTSP2 was lower than that of CP 21.14 % and 29. 72 % respectively, as the drift ratio reaching 5 %. The MTSP specimens had better self-centering capacity due to the increased pretension stress which reducing the residual displacement greatly. The energy dissipation reinforcements improved the energy dissipation capacity of the segmental assembled piers. Based on the ABAQUS model, the numerical simulation was carried out and compared with the experimental data. MTSP had great energy dissipation capacity and self-centering capacity. It was suggested that MTSP should be used to make up for the deficiency of segmental assembled pier and improve the seismic performance of segmental assembled pier.
format	article
author	Yongjun Ni Changshun Hao Yanzhou Xu
author_facet	Yongjun Ni Changshun Hao Yanzhou Xu
author_sort	Yongjun Ni
title	Seismic performance analysis of self-centering segment piers with mortise-tenon shear connectors based on cyclic pseudo-static test
title_short	Seismic performance analysis of self-centering segment piers with mortise-tenon shear connectors based on cyclic pseudo-static test
title_full	Seismic performance analysis of self-centering segment piers with mortise-tenon shear connectors based on cyclic pseudo-static test
title_fullStr	Seismic performance analysis of self-centering segment piers with mortise-tenon shear connectors based on cyclic pseudo-static test
title_full_unstemmed	Seismic performance analysis of self-centering segment piers with mortise-tenon shear connectors based on cyclic pseudo-static test
title_sort	seismic performance analysis of self-centering segment piers with mortise-tenon shear connectors based on cyclic pseudo-static test
publisher	JVE International
publishDate	2021
url	https://doaj.org/article/9abf66f2585b4106b392064e875a5756
work_keys_str_mv	AT yongjunni seismicperformanceanalysisofselfcenteringsegmentpierswithmortisetenonshearconnectorsbasedoncyclicpseudostatictest AT changshunhao seismicperformanceanalysisofselfcenteringsegmentpierswithmortisetenonshearconnectorsbasedoncyclicpseudostatictest AT yanzhouxu seismicperformanceanalysisofselfcenteringsegmentpierswithmortisetenonshearconnectorsbasedoncyclicpseudostatictest
_version_	1718426859967873024

Seismic performance analysis of self-centering segment piers with mortise-tenon shear connectors based on cyclic pseudo-static test

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