地基不均勻沉降對(duì)基礎(chǔ)隔震結(jié)構(gòu)地震易損性的影響
發(fā)布時(shí)間:2019-01-26 18:57
【摘要】:為了研究地基不均勻沉降對(duì)基礎(chǔ)隔震結(jié)構(gòu)抗震性能的影響,對(duì)比分析發(fā)生沉降的的基礎(chǔ)隔震結(jié)構(gòu)和未發(fā)生沉降的隔震結(jié)構(gòu),從能量的角度入手,引入綜合考慮變形和能量的雙參數(shù)損傷模型對(duì)其上部結(jié)構(gòu)進(jìn)行損傷分析,并以樓層最大損傷指數(shù)為量化指標(biāo),對(duì)其上部結(jié)構(gòu)進(jìn)行了易損性分析。研究結(jié)果表明:不均勻沉降發(fā)生后,隔震支座位移變大;在地震動(dòng)作用下,上部結(jié)構(gòu)樓層損傷增加;發(fā)生沉降的基礎(chǔ)隔震結(jié)構(gòu)超越各級(jí)極限破壞狀態(tài)的概率大于未沉降的隔震結(jié)構(gòu),更容易遭受地震破壞。
[Abstract]:In order to study the effect of uneven settlement of foundation on seismic performance of foundation isolated structure, the foundation isolated structure with settlement and the isolated structure without settlement are compared and analyzed from the angle of energy. A two-parameter damage model considering the deformation and energy is introduced to analyze the damage of the superstructure. The maximum damage index of the floor is taken as the quantitative index to analyze the vulnerability of the superstructure. The results show that the displacement of the isolation support becomes larger after the uneven settlement occurs, and the damage of the upper structure floor increases under the action of ground motion. The probability that the base isolated structure with settlement exceeds the limit failure state of each level is more likely to be damaged by earthquake than that of the unsettled isolated structure.
【作者單位】: 蘭州理工大學(xué)防震減災(zāi)研究所;蘭州理工大學(xué)西部土木工程防災(zāi)減災(zāi)教育部工程研究中心;
【基金】:國(guó)家自然科學(xué)基金資助項(xiàng)目(51578274)
【分類(lèi)號(hào)】:TU352.1;TU433
本文編號(hào):2415798
[Abstract]:In order to study the effect of uneven settlement of foundation on seismic performance of foundation isolated structure, the foundation isolated structure with settlement and the isolated structure without settlement are compared and analyzed from the angle of energy. A two-parameter damage model considering the deformation and energy is introduced to analyze the damage of the superstructure. The maximum damage index of the floor is taken as the quantitative index to analyze the vulnerability of the superstructure. The results show that the displacement of the isolation support becomes larger after the uneven settlement occurs, and the damage of the upper structure floor increases under the action of ground motion. The probability that the base isolated structure with settlement exceeds the limit failure state of each level is more likely to be damaged by earthquake than that of the unsettled isolated structure.
【作者單位】: 蘭州理工大學(xué)防震減災(zāi)研究所;蘭州理工大學(xué)西部土木工程防災(zāi)減災(zāi)教育部工程研究中心;
【基金】:國(guó)家自然科學(xué)基金資助項(xiàng)目(51578274)
【分類(lèi)號(hào)】:TU352.1;TU433
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