摘要
针对用于代替黏土砖住宅结构的钢筋混凝土柔性梁柱加人字支撑形成的新型复合结构,进行了低周反复荷载下的抗震试验研究。试验采用1∶2的缩尺模型;根据计算的各抗震设防烈度对应的地震作用及开裂荷载、屈服荷载设计出加载制度;采用液压伺服装置进行低周反复荷载试验。根据试验现象和数据,分析了复合结构裂缝及塑性铰出现的顺序和位置;绘出试件的滞回曲线、骨架曲线;计算出结构的延性系数。在此基础上,研究复合结构恢复力模型和表达式,分析其耗能机制和抗震能力,结果表明复合结构具有“强柱、中梁、弱支撑”多道抗震防线的抗震性能。采用建筑工程软件PKPM计算的开裂及屈服荷载和试验值符合较好。
Experiments are conducted on novel composite structures with flexible reinforced concrete beams and columns and herringbone braces under low-period cyclic load. A test model of scale 1：2 is manufactured. The loading process is designed on the basis of the cracking and yielding loads and earthquake action as calculated for seismic load of fortification intensity. According to the experimental results, the sequence and position of cracks and plastic hinges of the compound structure are analyzed, and the hysteresis curves, skeleton curves and the coefficient of ductility obtained. A computation model of rehabilitation force is proposed. The results indicate that the collapsing mechanism of the composite structure is formed by plastic hinges occurring in the order in braces, beams and columns. The results show that the composite structure possesses good seismic property due to multiple lines of defense. The calculation of the cracking load and the failure load with the building engineering software, PKPM, is in good agreement with test results.
出处
《土木工程学报》
EI
CSCD
北大核心
2006年第8期51-56,共6页
China Civil Engineering Journal
基金
河南省自然科学基金(511050400)
国家自然科学基金(50478050)
河南省教育厅自然科学研究项目(200510459055)
关键词
复合结构
低周反复荷载
试验研究
抗震性能
composite structure
low-period cyclic load
experimental study
seismic property
