【作者】 王建强；

【导师】 姚谦峰；

【作者基本信息】 西安建筑科技大学 ， 结构工程， 2003， 博士

【摘要】 近三十年来，由于基础隔震结构在结构试验及实际地震中表现出的优良的耐震性能，引起了国内外学术界和工程界的广泛关注。基础隔震技术已成为一种新的抗震对策，不仅适用于新建房屋设计，而且也为旧房加固和珍贵历史文物的保护开辟了新的途径。基础隔震技术的应用和发展与隔震系统力学性能的研究及基础隔震结构地震反应分析理论和计算方法的研究进程息息相关。然而在目前的研究中，常常采用简化的计算模型和假定，从而忽略许多影响结构实际地震反应的客观因素。为进一步发展和完善基础隔震结构分析理论和计算方法，本文以隔震系统恢复力模型研究及基础隔震结构非线性地震反应分析为基础，对基础隔震结构的多维地震反应及平—扭耦联地震反应开展了以下几方面的研究工作： 根据隔震系统力学性能的特点，在现有研究成果的基础上，对隔震系统恢复力计算模型进行了改进和创新，提出了普通叠层橡胶支座单向及双向耦合粘弹性恢复力计算模型，铅芯叠层橡胶支座单向及双向耦合粘弹塑性微分型恢复力计算模型，摩擦滑动支座单向及双向耦合修正粘塑性微分型恢复力计算模型。通过与试验结果的对比分析，表明各种计算模型简洁、实用。 将隔震装置作为特殊单元，采用空间杆系—层模型作为基础隔震结构动力分析模型，建立其运动方程，采用逐步积分法和迭代法进行时程反应分析，编制了可进行基础隔震结构多维及平—扭耦联地震反应分析的基础隔震结构动力分析程序DABIS。 对铅芯叠层橡胶支座基础隔震结构进行了单向及双向地震反应对比分析，并研究了支座最大位移的确定；对结构进行了平—扭耦联地震反应分析，研究上部结构的偏心距及非耦联周期比、隔震层偏心距等因素对结构的平—扭耦联地震反应的影响，并对结构平—扭耦联地震反应的控制进行了探讨。 对摩擦滑动支座基础隔震结构进行了单向及双向地震反应对比分析，研究了结构平—扭耦联地震反应，分析上部结构的偏心距及非耦联周期比对结构的平—扭耦联地震反应的影响，探讨了对结构平—扭耦联地震反应的控制。西安建筑科技大学博士学位论文 对组合基础隔震结构进行了单向及双向地震反应对比分析，研究了结构平一扭祸联地震反应，探讨了对结构平一扭祸联地震反应的控制。 采用能量方法，建立基础隔震结构能量反应方程，对基础隔震结构地震反应进行能量分析，研究地震动的频谱特性、幅值、持时、上部结构自振周期及隔震系统动力性能等因素对结构总输入能量的影响;并对基础隔震结构进行耗能分析，研究结构总输入能量在结构中的分配，为基础隔震结构能量设计提供依据。 综上所述，通过对隔震系统恢复力模型及基础隔震结构非线性地震反应分析的研究，编制了可用于工程实际计算的基础隔震结构动力分析程序，对基础隔震结构多维地震反应及平一扭祸联地震反应进行了较为详尽的分析，完善和发展了基础隔震结构分析理论和计算方法。更多还原

【Abstract】 In the recent thirty years, due to their favorable aseismic performance both in laboratory and in realty, base-isolated structures have attracted extensive attention in both academic field and engineering field. Base-isolation technique has been considered as a viable alternative aseismic method, not only for designing of new structures, but also for rehabilitating of deficient buildings and protecting of historical buildings. The application and development of base-isolation technique is closely bound up with the progress of the research on the mechanical performance of isolation systems and on the analysis theory and calculation method of the seismic response of base-isolated structures. However, in the present research, many objective factors which influences the seismic response of base-isolated structures have been neglected because of adoption of simple calculation model and supposition. In order to develop and consummate the analysis theory and calculation method of base-isolated structures, based on the research on restoring force model of isolation systems and the analysis on the nonlinear seismic response of base-isolated structures, the analysis on multi-dimensional and lateral-torsional coupled seismic response of base-isolated structures is developed in this paper.According to the mechanical performance of isolation systems, detailed analysis and improvement of the present research, an unilateral and a bilateral coupled visco-elastic hysteretic model for rubber bearings, an unilateral and a bilateral coupled visco-elasto-plastic differential hysteretic model for lead rubber bearings, an unilateral and a bilateral coupled modified visco-plastic differential hysteretic model for sliding friction bearings are proposed. The models are proved to be concise and efficient compared with the tests results.The spatial member-story model is adopted as the dynamic analysis model for base-isolated structures by considering the isolation device as a special element, the dynamical equation isestablished, time-history analysis is conducted by step-by-step integration and iteration methods, and program of dynamic analysis on base-isolated structures (DABIS) which can be used for analysis on multi-dimensional and lateral-torsional coupled seismic response of base-isolated structures is worked out.The analysis on unilateral, bilateral and lateral-torsional coupled seismic response of base-isolated structures with lead rubber bearings is carried out. The maximal displacement of the bearings is studied. The influence on lateral-torsional coupled seismic response of base-isolated structures due to the excentricity and uncoupled period ratio of the superstructure, and the excentricity of the isolation system is investigated. The control of lateral-torsional coupled seismic response of structures is discussed.The analysis on unilateral, bilateral and lateral-torsional coupled seismic response of base-isolated structures with sliding friction bearings is carried out. The influence on lateral-torsional coupled seismic response of base-isolated structures due to the excentricity and the uncoupled period ratio of the superstructure is investigated, and the control of lateral-torsional coupled seismic response of structures is discussed.The analysis on unilateral, bilateral and lateral-torsional coupled seismic response of base-isolated structures with combined isolation systems is carried out, and the control of lateral-torsional coupled seismic response of structures is discussed.The energy analysis on base-isolated structures is conducted by energy method. The influence on the total input earthquake energy owing to the frequency, intensity and lasting-time of earthquake and so on is studied. The dispassion of the total input earthquake energy is also investigated.Through the study on the restoring-force model of isolation systems and on the nonlinear seismic response of base-isolated structures, the program of dynamic analysis of base-isolated structures (DABIS) is worked out. Detailed analysis on更多还原