- 摘 要
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(1 石家莊鐵道大學省部共建交通工程結(jié)構(gòu)力學行為與系統(tǒng)安全國家重點實驗室, 石家莊 050043;2 石家莊鐵道大學土木工程學院, 石家莊 050043; 3 河北省交通規(guī)劃設(shè)計研究院有限公司,石家莊 050011)
摘要: 以雄安新區(qū)某實際工程為研究背景,通過足尺模型擬靜力試驗研究了 PRC 管樁與預制管柱變徑法蘭連接方式的抗震性能,從試件的破壞現(xiàn)象、滯回曲線、骨架曲線、殘余變形、法蘭彎矩轉(zhuǎn)角關(guān)系等方面探究了變徑樁柱法蘭連接的可靠性及抗震性能,揭示了試件的損傷過程和最終破壞形式. 試驗結(jié)果表明:法蘭強度較高,加勁肋和法蘭板沒有出現(xiàn)屈曲. 樁柱混凝土與端板連接強度較低,在試驗過程中此處產(chǎn)生較大的粘結(jié)裂縫,預制管柱與管樁縱筋產(chǎn)生的較大滑移是試件承載力下降的主要原因,并提出了相應的優(yōu)化措施,為變徑樁柱法蘭連接設(shè)計提供技術(shù)支撐.
關(guān)鍵詞: 預制拼裝; 樁柱式基礎(chǔ); 變徑法蘭; 連接可靠性
中圖分類號:U442. 5+5 文獻標志碼:A 文章編號:1002-848X(2023)12-0121-05
DOI:10. 19701 / j. jzjg. 20201752
Experimental study on reliability of flange connection of variable diameter pile-column
GUO Jin1,2, SUN Ruojin2, ZHANG Weiheng2, LI Zhicong3, SONG Hao2, CHEN Wei2
(1 State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures, ShijiazhuangTiedao University, Shijiazhuang 050043, China; 2 School of Civil Engineering, Shijiazhuang Tiedao University,Shijiazhuang 050043, China; 3 Hebei Provincial Communications Planning, Design and Research Institute Co. , Ltd. ,Shijiazhuang 050011, China)
Abstract: Based on a practical project in Xiong’ an New area, the seismic performance of variable diameter flangeconnection between PRC pile and prefabricated pipe columns was studied by full-scale model pseudo-static test. Thereliability and seismic performance of flange connection of variable diameter pile-column were investigated by studying thefailure phenomenon, hysteretic curve, skeleton curve, residual deformation and flange bending angle, and the damageprocess and ultimate failure form of the specimens were revealed. The experimental results show that the strength of theflange is relatively high, and the stiffener and flange plate did not buckle. The strength of the connection between the pilecolumn concrete and the end plate is relatively low, and large bonding cracks were generated here during the experiment.The main reason for the decrease in the bearing capacity of the specimen is the large slippage between the precast pipecolumn and the pipe pile longitudinal reinforcement and corresponding optimization measures were proposed to providetechnical support for the design of flange connection of variable diameter pile-column.
Keywords:prefabricated assembly; pile-column foundation; variable diameter flange; connection reliability
∗國家自然科學基金資助項目(51508351、51508350),河北省自然科學基金資助項目(E2017210117),河北省高等學校科學技術(shù)研究項目(ZD2017071).
第一作者:郭進,博士,副教授,主要從事橋梁抗震研究,Email:jinguo@ stdu. edu. cn.
[引用本文] 郭進,孫若津,張衛(wèi)恒,等. 變徑樁柱法蘭連接可靠性試驗研究[ J]. 建筑結(jié)構(gòu),2023,53(12):121-125,137. GUO Jin,SUN Ruojin,ZHANG Weiheng,et al. Experimental study on reliability of flange connection of variablediameter pile-column[J]. Building Structure,2023,53(12):121-125,137.
