- 摘 要
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（廣東省建筑設計研究院，廣州 510010）
［摘要］為了掌握鋼管混凝土柱和鋼筋混凝土梁不穿心節(jié)點的抗震性能，進行了8個試件在恒定軸力和水平反復荷載作用下的試驗研究。主要考察了不穿心節(jié)點梁的縱向鋼筋與鋼管柱環(huán)板所采用的焊接和搭接兩種連接方式、牛腿長度等參數對抗震性能的影響。試驗結果表明：鋼筋焊接與搭接兩種連接方式的節(jié)點滯回曲線均較為飽滿，延性系數均能滿足抗震設計要求，但焊接節(jié)點比搭接節(jié)點具有更高的承載力，且剛度退化不明顯。搭接節(jié)點由于混凝土較早開裂和損傷，其“小震不壞，中震可修”的抗震性能較難滿足，尚需進一步深入研究。焊接節(jié)點整體抗震性能優(yōu)于搭接節(jié)點。牛腿長度對節(jié)點延性和承載力影響很小。根據試驗結果提出了設計建議。
［關鍵詞］鋼管混凝土柱；不穿心節(jié)點；抗震性能；延性
Experimental research on seismic behavior of non-through-core joints of concrete beams and concrete filled CHS columns
Li Songbai, Li Zhenzhang, Liang Jizhong（The Architecture Design and Research Institute of Guangdong Province, Guangzhou 510010, China）
Abstract:In order to realize the seismic behavior of non-through-core joints of concrete beams and concrete filled CHS columns, eight test specimens were experimentally studied under constant axial load and cyclically lateral load. It is considered as experimental parameters that two methods-welded joint and overlap joint for jointing reinforcement to horizontal circular steel plate on the outside of concrete filled CHS columns, the length of steel corbel. The test results show that the lateral load (P) versus lateral displacement (Δ) hysteretic curves of welded joints and overlap joints are plump shuttle shape, the ductility of displacement of them can meet the requirements of seismic design, but the welded joints have higher lateral ultimate strength than the overlap joints, and their strength and stiffness degradation are no obvious. The behavior of overlap joints can hardly meet the seismic design procedure of ‘the structure can sustain a minor earthquake without any damage, a moderate earthquake with repairable structure damage′. The welded joints have a better seismic behavior than the overlap joints. The length of steel corbel has hardly effect on the strength and stiffness of joints. Based on the experimental research, the design proposals are provided.
Keywords:concrete filled CHS columns; non-through-core joints; seismic behavior; ductility
作者簡介：李松柏，碩士，高級工程師，一級注冊結構工程師，Email: lsb2003bsl@163.com。
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