高强混合配筋高强混凝土梁柱节点的抗震性能试验研究  

Experimental study on seismic behavior of high strength concrete beam-column joints reinforced with high strength steels and CFRP tendons

作　　者：王作虎[1] 陈礼 杨菊 王江北 Wang Zuohu;Chen Li;Yang Ju;Wang Jiangbei(Multi-Functional Shaking Tables Laboratory,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;China Civil Aviation Engineering Consulting Company Limited,Beijing 100621,China)

机构地区：[1]北京建筑大学大型多功能振动台阵实验室,北京100044 [2]中国民航工程咨询有限公司,北京100621

出　　处：《建筑科学》2022年第11期97-104,共8页Building Science

基　　金：国家自然科学基金项目(51421005、51878028)。

摘　　要：为了研究高强混合配筋高强混凝土梁柱节点的抗震性能,对6个梁柱节点进行了破坏性加载试验,研究了节点不同混凝土强度、有无碳纤维增强塑料(CFRP)筋、不同轴压比、节点核心区不同配箍率和梁根部有无高性能纤维增强水泥基材料(Engineered Cementitious Composites, ECC)对其抗震性能的影响。研究结果表明:所有高强钢筋高强混凝土梁柱节点都具有良好的延性,延性系数满足规范的要求且都大于3;配置了CFRP筋的梁柱节点的抗震性能优于同等工况下的无CFRP筋梁柱节点;梁根部部分区域采用ECC的节点(EBCJ1)对比未采用ECC的节点(HBCJ1),相同条件下其延性系数提高了11.80%~15.00%;不同的轴压比下,在梁端加载条件下高强钢筋高强混凝土梁柱节点的承载力相差不大。In order to study the seismic behavior of high-strength concrete beam-column joints reinforced with high-strength steels and CFRP tendons, destructive test is conducted on six beam-column joints, the effects of different concrete at the root of beam, the use of CFRP tendons or not, axial compression ratio, and different stirrup ratio of joints on the seismic behavior are studied. The test results indicate that all high strength concrete beam-column joints reinforced with high strength steels have good ductility, and the ductility coefficient meets the requirements of the Code and is greater than 3. The seismic performance of beam-column joints reinforced with high steels and CFRP tendons is better than that of joints without CFRP tendons under the same conditions. The ductility coefficient of joint HBCJ1(without ECC at the root of the beam) has increased by 11.80%-15.00% compared with the joint EBCJ1(using ECC). There is little difference in bearing capacity of high-strength concrete beam-column joints with beam end loading condition under different axial compression ratios.

关 键 词：高强钢筋 碳纤维增强塑料筋 高强混凝土 梁柱节点 抗震性能 

分 类 号：TU352.1[建筑科学—结构工程]