{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,21]],"date-time":"2026-09-21T16:24:57Z","timestamp":1790007897951,"version":"4.0.1"},"reference-count":45,"publisher":"MDPI AG","issue":"17","license":[{"start":{"date-parts":[[2022,9,1]],"date-time":"2022-09-01T00:00:00Z","timestamp":1661990400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"National Natural Science Fundation of China","award":["52178158"],"award-info":[{"award-number":["52178158"]}]},{"name":"National Natural Science Fundation of China","award":["21G149"],"award-info":[{"award-number":["21G149"]}]},{"name":"National Natural Science Fundation of China","award":["201820"],"award-info":[{"award-number":["201820"]}]},{"name":"Education Department of Hubei Province","award":["52178158"],"award-info":[{"award-number":["52178158"]}]},{"name":"Education Department of Hubei Province","award":["21G149"],"award-info":[{"award-number":["21G149"]}]},{"name":"Education Department of Hubei Province","award":["201820"],"award-info":[{"award-number":["201820"]}]},{"name":"Wuhan Construction Committee","award":["52178158"],"award-info":[{"award-number":["52178158"]}]},{"name":"Wuhan Construction Committee","award":["21G149"],"award-info":[{"award-number":["21G149"]}]},{"name":"Wuhan Construction Committee","award":["201820"],"award-info":[{"award-number":["201820"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Materials"],"abstract":"<jats:p>Quantitative calculation and evaluation of seismic damage are very important for structural safety, performance-based structural analysis, and seismic reinforcement. However, the relevant research results for precast concrete structures are extremely limited. In this paper, the seismic damage evaluation of beam-column joints in monolithic precast concrete frames was studied through cyclic loading tests and damage index calculation. The seismic damage process, load-displacement relationship, stiffness degradation, and the influence of axial compression ratio were analyzed, then the damage indexes were calculated and analyzed, and the quantitative evaluation of joint damage was conducted last. The results show that the connection seams can significantly affect the mechanical properties of precast joints, easily causing damage concentration, resulting in a lower bearing capacity and faster stiffness degradation compared with a cast-in-situ joint. A larger axial compression ratio can bring higher bearing capacity for the precast joints, and the peak load can be increased by 42.9% when the axial compression ratio is increased from 0.2 to 0.4. In contrast, the stiffness degradation will be accelerated with the increase in the axial compression ratio. From yield load to peak load, the stiffness of the precast joint with the largest axial compression ratio decreases by 46.0%, while the joint with the smallest axial compression ratio is only 36.4%. The damage index model adopted in this paper can accurately reflect the damage characteristics of the precast joints. The presented damage states based on the damage index calculation can accurately reflect the joint\u2019s damage characteristics according to different stages. The paper realizes the quantitative damage evaluation for this kind of joint and provides a theoretical basis and method for further studies.<\/jats:p>","DOI":"10.3390\/ma15176038","type":"journal-article","created":{"date-parts":[[2022,9,2]],"date-time":"2022-09-02T00:19:01Z","timestamp":1662077941000},"page":"6038","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":10,"title":["Seismic Damage Evaluation of Beam-Column Joints in Monolithic Precast Concrete Frame Structures"],"prefix":"10.3390","volume":"15","author":[{"given":"Yan","family":"Cao","sequence":"first","affiliation":[{"name":"School of Arts Design, Wuchang University of Technology, Wuhan 430223, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2176-3472","authenticated-orcid":false,"given":"Zhao","family":"Yang","sequence":"additional","affiliation":[{"name":"School of Urban Construction, Wuhan University of Science and Technology, Wuhan 430065, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2022,9,1]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1777","DOI":"10.1061\/JSDEAG.0005782","article-title":"An evaluation of inelastic seismic design spectra","volume":"107","author":"Mahin","year":"1981","journal-title":"J. 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