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(1 新鄉(xiāng)學(xué)院土木工程與建筑學(xué)院, 新鄉(xiāng) 453003; 2 西安建筑科技大學(xué)設(shè)計研究總院, 西安 710055;3 西安建筑科技大學(xué)土木工程學(xué)院, 西安 710055)

摘要: 為研究再生砌體填充墻-型鋼再生混凝土框架結(jié)構(gòu)的抗震性能,試驗設(shè)計了 1 榀再生混凝土框架和 2 榀再生砌體填充墻-型鋼再生混凝土框架并進(jìn)行低周往復(fù)加載試驗。 試驗結(jié)果表明:純框架試件及帶填充墻框架試件均為延性破壞,填充墻沿框架平面對角線區(qū)域破壞較為嚴(yán)重,梁端與柱端先后出現(xiàn)塑性鉸,符合“強柱弱梁” 的抗震設(shè)計概念;帶填充墻框架相比純框架峰值承載力提升 80%左右,平均位移延性系數(shù)大于 6,表明其具有良好的變形能力;帶填充墻框架在加載前期耗能能力強于純框架試件,后期因填充墻破壞而承載能力迅速下降,極限位移較小,耗能能力弱于純框架試件;軸壓比越大,帶填充墻框架峰值荷載后的延性和耗能能力下降越快。 基于現(xiàn)有等效斜壓桿理論對試件進(jìn)行 Pushover 分析,結(jié)果表明 Klingner 模型與試驗結(jié)果吻合最好。 合理布置的填充墻可作為結(jié)構(gòu)抗震的第一道防線,性能點處結(jié)構(gòu)滿足“大震不倒”的抗震要求。

關(guān)鍵詞: 型鋼混凝土框架; 再生砌體填充墻; 再生混凝土; 等效斜壓桿理論; 抗震性能

中圖分類號:TU398. 2 文獻(xiàn)標(biāo)志碼:A 文章編號:1002-848X(2022)13-0062-07

DOI:10. 19701 / j. jzjg. 20211964

Seismic performance analysis of recycled masonry infill wall-shaped steel recycled concrete frame structure

ZHANG Yanqing1, YANG Penghui2,3, ZHOU Zhiming3

(1 College of Civil Engineering and Architecture, Xinxiang University, Xinxiang 453003, China;2 General Institute of Design and Research, Xi’ an University of Architecture and Technology, Xi’ an 710055, China;3 School of Civil Engineering, Xi’ an University of Architecture and Technology, Xi’ an 710055, China)

Abstract: In order to study the seismic performance of recycled masonry infill wall-shaped steel recycled concrete frame structure, one specimen of recycled concrete frame and two specimens of recycled masonry infill wall-shaped steel recycled concrete frame structure were designed and subjected to low cycle reciprocating loading test. The test results show that both the pure frame specimens and the frame specimens with filled walls have ductile failure, and the failure of the filled wall is more serious along the diagonal area of the frame plane, and the plastic hinge appears successively at the beam and column ends, which accords with the seismic design concept of “ strong column and weak beam” . The peak bearing capacity of the frame with filled wall is about 80% higher than that of the pure frame, and the average displacement ductility coefficient is greater than 6, indicating that it has good deformation capacity. In the early stage of loading, the energy dissipation capacity of the frame with filled wall is stronger than that of the pure frame specimen, but in the later stage, the bearing capacity decreases rapidly due to the failure of the filled wall, and the ultimate displacement is smaller, and the energy dissipation capacity is weaker than that of the pure frame specimen. The larger the axial compression ratio is, the faster the ductility and energy dissipation capacity of the frame with filled wall decreases after peak load. Pushover analysis of specimens based on the existing equivalent baroclinic bar theory shows that Klingner model is in good agreement with the test results. Reasonably arranged infill walls can serve as the first line of defense against earthquakes, and the structure at the performance point can meet the seismic requirements of “ no collapsing under the rarely-occurred earthquake” .

Keywords:shaped steel concrete frame; recycled masonry filled wall; recycled concrete; equivalent baroclinic bar theory; seismic performance