884aa四虎影成人精品,99久久国产综合精品女图图等你,97在线观看永久免费视频,久久精品国产精品亚洲38,ⅵdeodesetv性欧美

(1 嘉興職業(yè)技術(shù)學(xué)院， 嘉興 314030； 2 沈陽建筑大學(xué)土木工程學(xué)院， 沈陽 110168)

［摘要］節(jié)點連接形式是裝配式混凝土框架結(jié)構(gòu)研究的重點，提出一種鉤掛式連接節(jié)點，設(shè)計制作5個中柱節(jié)點試件，開展擬靜力試驗研究，分析了試件破壞形態(tài)、承載能力、滯回曲線、延性系數(shù)和關(guān)鍵部位鋼筋和混凝土應(yīng)變。結(jié)果表明，鉤掛式節(jié)點試件破壞位置發(fā)生在預(yù)制節(jié)點邊梁與混凝土后澆區(qū)接縫處，此處是節(jié)點薄弱部位，節(jié)點核心區(qū)基本完好，符合強節(jié)點抗震設(shè)計理念；節(jié)點試件滯回曲線較為飽滿，骨架曲線走勢基本一致，延性系數(shù)較高，表明節(jié)點具有良好的耗能能力和延性性能；鋼筋鉤掛連接處應(yīng)變數(shù)值隨荷載增加而增大，鋼筋應(yīng)變速率大體呈均勻變化趨勢，表明節(jié)點工作性能良好，能有效傳遞內(nèi)力。

［關(guān)鍵詞］裝配式結(jié)構(gòu)； 混凝土框架； 鉤掛式節(jié)點； 擬靜力試驗； 抗震性能

中圖分類號：TU398文獻標識碼：A文章編號：1002-848X(2019)11-0033-05

Study on seismic behavior of hook-and-hang typed mid-column joints for prefabricated concrete frame

Gu Wei1, Zhang Xinxin2, Li Zhongpei1, Zhang Yannian2, Ruan Xueqin1

(1 Jiaxing Vocational Technical College, Jiaxing 314030, China; 2 School of Civil Engineering, Shenyang Jianzhu University, Shenyang 110168, China)

Abstract:The connection form is the key point in the research of prefabricated concrete frame structures. A hook-and-hang typed joint was proposed. Five mid-column joint specimens were designed and manufactured. The quasi-static test was carried out. The failure modes, bearing capacity, hysteretic curve, ductility coefficient and strain of reinforcement and concrete in key parts were analyzed. The results show that the failure location of the hook-and-hang typed joints occurs at the joint between the side beam of the prefabricated joints and the concrete post-pouring area, which is the weak part of the joints. The core area of the joints is basically intact and conforms to the seismic design concept of the strong joints. The hysteretic curve is full, and the skeleton curve is basically the same, and the ductility coefficient is high, which indicates that the joints have good energy dissipation capacity and ductility performance. The strain value of joint increases with the increase of load, and the strain change rate of steel bar is generally uniform variation trend, which indicates that the joint has good working performance and can effectively transfer internal force.

Keywords:prefabricated structure; concrete frame; hook-and-hang typed joint; quasi-static test; seismic behavior