桥墩高度对桥梁隔震性能的影响研究

发布时间：2019-03-03 10:35

【摘要】：以我国近海交通工程某隔震连续梁桥为研究对象,通过考虑影响隔震桥梁隔震性能的主要因素,建立其简化隔震计算力学模型,并采用有限元程序对隔震桥梁模型进行地震动时程响应模拟,以验证所采用简化力学计算模型的合理性。根据该模型研究桥墩高度对混凝土桥隔震性能的影响,分析表明:随桥墩高度逐渐增加,桥墩质量相应增加,桥梁结构自振周期延长,隔震桥的第二阶自振周期趋近于第一阶自振周期。对于低墩桥梁而言,桥墩高度对桥梁隔震性能影响显著,随着桥墩高度的不断增加,桥墩高度对桥梁隔震性能仍具有影响,但其影响程度逐渐下降。
[Abstract]:Taking an isolated continuous beam bridge in offshore traffic engineering of China as the research object, the simplified calculation mechanics model of isolation is established by considering the main factors affecting the isolation performance of the isolated bridge. Finite element program is used to simulate the time-history response of isolated bridge model in order to verify the rationality of the simplified mechanical calculation model. According to the model, the influence of pier height on seismic isolation performance of concrete bridge is studied. The results show that with the increase of pier height, the quality of pier increases correspondingly, and the natural period of bridge structure prolongs. The second order natural vibration period of the isolated bridge approaches to the first order natural vibration period. For low-pier bridges, pier height has a significant effect on seismic isolation performance. With the increasing of pier height, pier height still has influence on seismic isolation performance of bridges, but the degree of influence gradually decreases.
【作者单位】：广州大学广东省地震工程与应用技术重点实验室;华南理工大学亚热带建筑科学国家重点实验室;
【基金】：国家重点基础研究发展计划项目(2011CB013606,2012CB723304) 国家自然科学基金(51108105) 国家科技支撑计划项目(2012BAJ07B02) 亚热带建筑科学国家重点实验室开放基金项目(2011KB15) 住房和城乡建设部科学技术计划项目(K2201219) 番禺区珠江科技新星专项项目资助(2013-专15-6.05) 博士点基金项目(20124410110004) 地震行业基金项目(201008006)
【分类号】：U442.55

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