基于静态化处理的结构动静力混合分析研究与应用  

Research and application of dynamic and static hybrid analysis based on static treatment

作　　者：田淑明[1,2] 李康宁 聂建国[1] 

机构地区：[1]清华大学土木工程安全与耐久性教育部重点实验室,北京100084 [2]泰禾集团设计研发部,北京100022 [3]无锡宁震科技有限公司,江苏无锡214000

出　　处：《建筑结构学报》2016年第11期10-15,60,共7页Journal of Building Structures

基　　金：国家自然科学基金重点项目(50438020)

摘　　要：动静力混合分析是评价和预测结构震后破损状态的方法之一,由动力分析转向静力分析时,需要对结构的动力状态进行静态化处理,消除外部动力作用、阻尼力、惯性力及恢复力,保留退化后的刚度、已有变形和各种损伤。在现有动静力混合分析方法基础上,提出将地震动记录终止点置零、增加自由振动段消除阻尼力和惯性力、施加等效荷载消除恢复力三项改进措施,自由振动段采用有阻尼的自由振动方法估算持时,等效荷载输入时调整动、静力数据格式和分析步长,基于CANNY程序通过编程来实现上述过程。所提方法可用于结构震后破损评价、震后鉴定与加固、试验模拟、性能化设计及健康监测等领域,其评价标准建议考虑性能目标及结构部位的不同。最后,以一实际震后结构为例,探讨了改进方法在实际工程中应用的可行性,其分析和评价结果与实际吻合。Dynamic and static hybrid analysis is an effective method for damage assessment of structures, which is necessary when turning dynamic analysis to static analysis. The static treatment should eliminate external dynamic action, damping force, inertia force and restoring force but should inherit deteriorated stiffness, existing deformation and all damage. In order to realize the above process, three measures based on the existing method are proposed. The first one is to set end value of earthquake ground motion record to zero. the second one is to eliminate damping force and inertia force using damped free vibration. The third one is to eliminate restoring force using equivalent static load vector. The damped free vibration method is used to estimate duration of free vibration section. The data format and step size are modified in programming when equivalent static load vector is input. All the above process is realized in three-dimensional nonlinear analysis program CANNY. The proposed method can be applied to seismic damage evaluation, seismic appraisal and strengthening, test simulation, performance-based design and health monitoring etc. The relative criterion of evaluation is suggested according to performance goal and structural object. Lastly, feasibility of the proposed method is proved by the application to an actual post-earthquake structure whose results fit well with investigations.

关 键 词：动静力混合分析 静态化处理 非线性分析 破损评价 

分 类 号：TU312.1[建筑科学—结构工程] TU311.41