630 MPa高强钢筋混凝土大偏压柱受力性能试验  

Experimental research on the mechanical properties of concrete column reinforced with 630 MPa high-strength steel under large eccentric loading

作　　者：王毅红[1] 田桥罗 兰官奇 姚圣法 张建雄 刘喜[1] Yi-hong WANG;Qiao-luo TIAN;Guan-qi LAN;Sheng-fa YAO;Jian-xiong ZHANG;Xi LIU(School of Civil Engineering,Chang'an University,Xi'an 710061,China;POWERCHINA Guizhou Electric Power Engineering Co.,Ltd.,Guiyang 550081,China;School of Civil Engineering,Xi'an Shiyou University,Xi'an 710065,China;Jiangsu Tianshun Metal Materials Group Co.,Ltd.,Yangzhong 212219,China)

机构地区：[1]长安大学建筑工程学院,西安710061 [2]中国电建集团贵州电力设计研究院有限公司,贵阳550081 [3]西安石油大学土木工程学院,西安710065 [4]江苏天舜金属材料集团有限公司,江苏扬中212219

出　　处：《吉林大学学报（工学版）》2022年第11期2626-2635,共10页Journal of Jilin University:Engineering and Technology Edition

基　　金：国家自然科学基金面上项目(51578072);陕西省《热处理带肋高强钢筋混凝土结构应用技术规程》编制项目(220028170272)。

摘　　要：设计制作了17根630 MPa新型热处理带肋高强钢筋混凝土大偏心受压足尺柱试件,分析其破坏形态、侧向挠度、钢筋应变、混凝土应变及承载力,以研究630 MPa高强钢筋混凝土大偏心受压柱的受力性能和630 MPa高强钢筋的应力状态及抗压强度发挥水平。结果表明:630 MPa高强钢筋混凝土大偏心受压柱的典型破坏形态与普通钢筋混凝土相同;混凝土受压区所能达到的极限压应变大于现行规范采用的0.0033,有利于偏心受压构件中630 MPa高强钢筋抗压强度的充分发挥,达到与抗拉强度相同的值。各试件承载力试验值均远大于其承载力设计值,两者比值的平均值为1.887,用现行规范对630 MPa级高强钢筋混凝土柱构件进行设计计算是合理且安全的。提出了630 MPa高强钢筋在偏压构件中抗拉和抗压强度设计值取值均为545 MPa的建议,为制定高强钢筋混凝土结构应用技术规程和推广630 MPa高强钢筋的工程应用提供了试验依据。To study the mechanical properties of high-strength steel reinforced concrete columns under large eccentric loading,and to determine the stress state and the compressive strength level of a new developed 630 MPa ribbed high-strength steel,17 concrete columns reinforced with 630 MPa highstrength steel tested under large eccentric compression were fabricated,and the failure pattern,lateral deflection,strain of steel and concrete,and the bearing capacity were analyzed. The results show that the typical failure pattern of 630 MPa high-strength steel reinforced concrete column with large eccentric compression is the same as that of ordinary reinforced concrete column. The ultimate compressive strain of concrete compression zone is greater than 0.0033 in the current code,which is conducive to give full play to the compressive strength of 630 MPa high strength reinforcement in eccentric compression member,so that the compressive strength reaches the same value as the tensile strength. The test value of bearing capacity of each specimen is much higher than its design value,with an average value of the ratio of 1.887. It is reasonable and safe to design and calculate the 630 MPa high strength reinforced concrete column members by using the current specification. The tensile and compressive strength design values as 545 MPa of the630 MPa high-strength steel in column member subjected to eccentricity is put forward,providing an experimental basis for the compilation of technical specification for high-strength bar in concrete structures and the promotion of 630 MPa high-strength steel in engineering application.

关 键 词：结构工程 630 MPa高强钢筋 大偏心受压 高强钢筋混凝土柱 抗压强度 承载力 

分 类 号：TU375.3[建筑科学—结构工程]