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(1 山東建筑大學(xué)土木工程學(xué)院， 濟(jì)南 250101；2 山東建筑大學(xué)建筑結(jié)構(gòu)加固改造與地下空間工程教育部重點(diǎn)實(shí)驗(yàn)室， 濟(jì)南 250101)

［摘要］鋼筋混凝土柱在斜向地震作用下的抗震性能是影響結(jié)構(gòu)安全性的重要因素。以軸壓比、加載角度和端部有無(wú)鋼板網(wǎng)約束為參數(shù)，設(shè)計(jì)了5個(gè)高強(qiáng)鋼筋混凝土柱，并對(duì)其進(jìn)行了低周反復(fù)加載試驗(yàn)。分析了高強(qiáng)鋼筋混凝土柱的滯回性能、承載力、延性和耗能性能抗震性能指標(biāo)。結(jié)果表明，斜向加載時(shí)鋼筋混凝土柱的抗震性能較主軸加載時(shí)變差，且隨加載角度的增大，鋼筋混凝土柱的承載能力降低，變形能力和耗能能力提高；端部采用鋼板網(wǎng)約束可以有效增強(qiáng)對(duì)內(nèi)部混凝土的約束作用，減輕柱端混凝土的壓碎脫落程度，提高柱端塑性鉸區(qū)域耗能能力，同時(shí)使柱的承載能力和變形能力等抗震性能得到顯著改善。 

［關(guān)鍵詞］高強(qiáng)鋼筋混凝土柱；斜向地震；鋼板網(wǎng)約束；抗震性能；低周反復(fù)加載試驗(yàn) 

中圖分類號(hào)：TU398-7 文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2021)14-0094-07

Experimental study on seismic behavior of high-strength reinforced concrete columns subjected to oblique earthquakes 

LIU  Chunyang1,2,  YU  Guixin1,  LI  Fei1,  GUO  Changqun1 

(1 Department of Civil Engineering, Shandong Jianzhu University, Jinan 250101， China；2 Key Laboratory of Building Structural Retrofitting and Underground Space Engineering (Shandong Jianzhu University), Ministry of Education, Jinan 250101， China) 

Abstract: The seismic performance of reinforced concrete (RC) columns subjected to oblique earthquakes is an important factor affecting the safety of structures. Taking the axial compression ratio, loading angle and the presence or absence of steel mesh plate constraints at the ends as parameters, five high-strength RC columns were designed to carry out low-frequency cyclic loading test. The seismic performance indices of high-strength RC columns such as hysteretic performance, bearing capacity, ductility and energy dissipation performance were analyzed. The results show that the seismic performance of RC columns is worse under oblique loading than under principal axis loading, and with the increase of the loading angle, the bearing capacity of RC columns decreases, but the deformation capacity and energy dissipation capacity increase. The use of steel mesh plate constraints at the ends can effectively enhance the restraint effect on the internal concrete, reduce the degree of crushing and shedding of the concrete at the ends of the columns , improve the energy dissipation capacity of the plastic hinge area at the end of the column, at the same time make the seismic performance such as the bearing capacity and deformation capacity of the column significantly improve.  

Keywords:high-strength reinforced concrete column； oblique earthquake； steel mesh plate constraint； seismic performance；low-frequency cyclic loading test

*山東省自然科學(xué)基金（ZR2015EQ017，ZR2018MEE044）。

 作者簡(jiǎn)介：劉春陽(yáng)，博士，副教授，Email：liucy2011@sdjzu.edu.cn。