In recent years , reinforced concrete structure failures during construction time occur frequently . therefore , the research on structural reliability during construction is paid increasingly more attention on by scholars around the world 近年来,由于施工期钢筋混凝土结构事故的频繁发生,有关施工期结构的可靠性研究日益引起国内外学者的重视。
So we need not only keep on increasing the design level of structural reliability , the more realistic , and exigent task are the studies of the reliability evaluation theory and maintenance decision means for the structures on active duty 所以，为了提高结构的可靠性，不仅要提高结构可靠度的设计水平，更现实的任务是研究现役结构的可靠性评定理论及维修决策方法。
Based on the analysis of network orgnization , reliability models of some typical topologies are introduced by markov models respectively . matlab tool is then used to solve markov models and the results of these models with different topologies are compared 在分析目前层次网络结构的基础上,运用markov模型对几种典型网络拓扑结构的可靠性进行建模,使用matlab进行仿真,并将可靠性进行比较。
The probability of metallic structures is also a vital factor that affects the structures " safety , so some researches are taken on the probability of metallic structures in this paper , and finite element method is applied in probability analysis successfully 而金属结构的可靠性也是影响结构安全性的一个非常重要的因素，所以在本文中对起重机的金属结构可靠性也进行了一些研究工作，实现了可靠性分析在有限元中的应用。
Alike with the convex modeling of uncertainties , the presented method requires less for available information than probabilistic method , thereby , which provided a possible choice for the reliability analysis and design of structures when available information is lack or limited 和不确定性的凸集模型描述一样，所提方法对不确定参量已知数据的要求较低。且直观、简捷。从而为掌握数据信息较少时结构的可靠性评估提供了依据。
According to the diversity of structure reliability index and functional requirement of offshore jacket platform , the models of structural fuzzy optimum design of offshore jacket platforms is established . therefore , it is necessary to design the jacket platform with reliability optimum mode 本文考虑结构的可靠性并从模糊可靠性的观点对结构加以分析，在准确的可靠性约束情况下，建立了导管架海洋平台结构可靠性模糊优化设计模型。
The researchful progeny of this paper will help us to infer the statistical property of existing structural loading and resistance that answer to the existing structure and help us to reasonably estimate the existing structural reliability . in addition , the researchful progeny of this paper may help to develop the standard of appraising the existing structure that is used in our country , which will impel the methods of appraising the existing structural develop from applied methods to probability methods 论文研究成果有益于对现有结构的荷载、抗力作出更符合现有结构特点的推断，也有益于对现有结构的可靠性作出更合理的估计，可为我国现行鉴定标准的修订提供参考，推断目前的鉴定方法由实用鉴定法向概率鉴定方法发展。
In this theme , the actual states and basic performances of the dross - treatment factory building in present , especially the displacement of the base and the deformation of the structure , are described as a result of the works of investigation and detect ; mechanical analysis and load - carrying capability check of the building structure are carried out according to the results of investigation and detect , including the limit - elements analyses of representative spacial structure model ; a special analysis is made to the effects of the base displacements , and the threshold values of relative displacement of the base are proposed ; in connection with the results of the investigation , detect and analyses , the structural reliability of the dross - treatment factory building is analyzed and accessed , the grade of reliability are determined ; finally , with regard to the problems of the dross - treatment factory building , the effective technical measurements of reinforcement , usage , monitoring control etc . are put forwards 论文的研究目的是准确评定厂房结构的可靠性，并制定有效的技术措施。通过实际的调查和检测，论文全面论述了渣处理厂房目前的使用状况和基本性能，特别是地基位移和结构变形的状况；根据调查检测的结果，对厂房结构进行了系统的力学分析和承载力校核，包括典型结构单元的空间有限元分析；对地基位移的作用效应作了专门分析，提出后期使用中地基相对位移的控制值；结合调查检测和计算分析的结果，对渣处理厂房的可靠性进行了综合评定，判定了厂房的可靠性等级；最后，针对渣处理厂房所存在的问题，从加固、使用、监控等方面提出了相应的对策。
Based on the study for the methods of structural reliability analysis , including monte carlo method , response surface method and stochastic finite element method , response surface method ( rsm ) is selected . based on the random analysis of aqueduct ' s frequent actions and resistances , by rsm method together with the fem method and form method , the reliabilities of its primary poles can be analyzed and the reliability of the structure be reached 利用此方法，在对渡槽常遇荷载的不确定性分析和抗力不确定性分析的基础上，结合结构分析的确定性有限元法( fem )及可靠度计算的一次二阶矩法( form ) ，对桁架拱结构主要受力状态构件进行了可靠度分析，从而对结构的可靠性进行了评价。
Then , we analyze the actual status of network , according to the environment of the room where those computer equipments were placed , the reliability of network structure , the reliability of network applications , and the monitoring and management of network system and the actual status of network security , according to the safety of the remote transmission , the access control of servers group , the interface of internet , the defense of network viruses , the audit of network security , and the management of network security 然后,对重庆气矿的计算机网络、以及网络安全的现状进行调查研究。其次,针对重庆气矿的网络现状,从网络的机房物理环境、网络结构的可靠性、网络应用系统的可靠性、以及网络系统的监控管理、网络远程数据传输的安全、服务器集群访问的安全、 internet的安全接入、计算机网络病毒的防护、网络安全的审计、以及网络安全管理方面进行了详细的需求分析。
