摘要
反应位移法中地基弹簧刚度系数难以准确确定,且不同地基弹簧之间互不相关,难以准确地反映土体与结构之间的相互作用,造成土体与结构四周接触面的荷载分布存在误差。通过改进地基弹簧刚度系数的求解方法,提出了改进的反应位移法,即在有限元分析过程中摒弃传统的加载方式,采用在结构四周同时加载单位力的方式求解地基弹簧刚度系数。与现有的反应位移法的对比表明,改进的反应位移法计算结果合理,且具有更高的计算效率。
It is difficult to accurately determine the stiffness coefficient of foundation spring in the response displacement method. Furthermore, different foundation springs are not relevant, and the interaction between the structure and the soil cannot be actually reflected, causing error in the load distribution on the soil-structure contact. Taking the foundation spring as the research object, an improved response displacement method is proposed, abandoning the traditional loading method in the finite element analysis process and loading the force all around the structure to solve the stiffness coefficient of foundation spring. Compared with the existing response displacement methods, the calculated results of the improved method is reasonable, and the proposed method has higher computational efficiency.
出处
《岩土工程学报》
EI
CAS
CSCD
北大核心
2014年第7期1360-1364,共5页
Chinese Journal of Geotechnical Engineering
基金
国家自然科学基金项目(51178011)
国家重点基础研究发展计划(973计划)(2011CB013602)
2011年度北京市属高校人才强教深化计划中青年骨干人才项目(PHR20110808)
关键词
地下结构
地震反应
反应位移法
地基弹簧
刚度系数
underground structure
seismic response
response displacement method
foundation spring
stiffiaess coefficient
