摘要
为了研究玻璃纤维增强塑料筋混凝土框架的抗震性能,设计几何相似比为1∶4的结构缩尺模型,进行模拟地震振动台试验,采用4个不同强度水平地震作用进行单向、双向以及三向的地震波激励,得到模型的损伤和位移等宏观地震响应。结果表明:在罕遇地震作用下,玻璃纤维增强塑料筋结构达到中等破坏程度,但仍保持良好的整体性,基本符合“小震不坏,中震可修,大震不倒”的抗震设防标准;玻璃纤维增强塑料筋结构在竖向刚度突变位置出现较为严重破坏;为推迟构件开裂并提高承载能力,可使柱端弯矩增大系数增大并根据截面等效模量增大玻璃纤维增强塑料筋面积;在八度罕遇地震时,玻璃纤维增强塑料筋结构的层间位移角超过钢筋混凝土框架结构层间位移角限值,但仍具备一定的承载能力。
To study the seismic performance of glass fiber-reinforced plastic(GFRP)reinforced concrete frame,a structure model with a scale ratio of 1∶4 was designed and manufactured,which was tested by shaking table.Four horizontal seismic actions with different intensities were used to excite the frame in one direction,two directions and three directions,and the macroscopic seismic responses such as damage and displacement were obtained.The test results show that under the action of rare earthquakes,GFRP reinforced concrete frame structure is damaged to a moderate degree,while it still maintains a good integrity,and basically is in line with the requirements that“no damage under minor earthquake,repairable under moderate earthquake,and no collapse under major earthquake”proposed by the seismic fortification standard in China.The GFRP reinforced concrete frame structure is seriously damaged in the mutation position of vertical stiffness mutation position.In order to delay the cracking and improve the bearing capacity,the bending moment enlargement coefficient of column end can be increased and the area of GFRP bar can be increased according to the equivalent modulus of section.In case of an eight-degree earthquake,the maximum inter-story drift angle of GFRP reinforced concrete frame structure exceeds that of the steel bar reinforced concrete frame structure,while it still has a certain seismic capacity.
作者
徐晓达
陈动
许庆
张石
徐新生
XU Xiaoda;CHEN Dong;XU Qing;ZHANG Shi;XU Xinsheng(Central Research Institute of Building and Construction Co.,Ltd.,MCC Group,Beijing 100088,China;School of Civil Engineering,Xi’an University of Architecture and Technology,Xi’an 710055,Shaanxi,China;School of Civil and Transportation Engineering,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;School of Civil Engineering and Architecture,University of Jinan,Jinan 250022,Shandong,China)
出处
《济南大学学报（自然科学版）》
CAS
北大核心
2023年第6期703-710,共8页
Journal of University of Jinan(Science and Technology)
基金
国家自然科学基金重点项目(52038010)
中冶建筑研究总院有限公司重大课题(YCK2022Ky01)
北京建筑大学青年教师科研能力提升计划项目(X21071)
金字塔人才培养工程-建大英才项目(JDYC20220806)。
关键词
玻璃纤维增强塑料
加筋混凝土
振动台试验
抗震性能
层间位移角
glass fiber-reinforced plastic
reinforced concrete
shaking table test
seismic performance
inter-story drift angle
