A integrated research on the performance based design of earth structures and their risk assessment, management and social systems.

目前，我国许多设计规范正朝着基于性能的规范格式发展。遵循WTO/TBT协议，并将设计规范与国际标准（例如iso02394）协调一致，这是政府政策的一部分。基于性能的规范种类繁多，不同的组织和机构提出了许多可供选择的想法。整个情况还没有弄清楚。然而，问题的方向需要更准确地预测结构响应和量化设计中涉及的不确定性。似乎也很明显，需要建立更合理的程序来评估和管理这一设计、建造和维修过程中所涉及的风险。在此背景下，本文进行了以下研究：(1)对传统设计方法和基于数值分析的更复杂的设计方法（如有限元法）进行了回顾，以确定其预测能力。(2)为了使基于性能的规范更受欢迎，需要一个社会体系来对冲结构设计、施工和维护方面的风险。为了了解欧洲国家的做法，进行了调查。研究发现，尽管“基于性能的规格”这个词在欧洲不是很流行，但设计-建造、设计-建造-融资-运营和PFI在英国越来越受欢迎。(3)提出了将JGS-4001-2004《基于性能设计理念的基础设计原则》扩展到土方结构的草案。两章，即“路堤”和“切割斜坡”在本研究中起草。

Many of the design specifications in our country are now moving toward the performance based specification format. It is streaming from the government policy to follow WTO/TBT agreement and harmonize design codes to the international standards, for example to IS02394. The performance based specifications have wide varieties and many alternative ideas are proposed from various organizations and agencies. The whole picture has not yet been focused. However, the direction of the issue requires more accurate prediction of structural response and quantifications of uncertainties involved in the design. It also seems to be apparent that more rational procedure needs to be established to assess and manage the risks involved in this design, construction and maintenance process. Based on these backgrounds, the following points have been studied in this research :(1) The conventional design methods and more sophisticated design method based on numerical analysis such as FEM have been reviewed to identify their capability for prediction.(2) In order to make the performance based specifications more popular, a social system to hedge the risks concerning design, construction and maintenance of a structure is required. An investigation was carried out to see the practice of European countries has been conducted. It was found that, although the word 'performance based specifications' is not very popular in Europe, Design-Built, Design-Built-Finance-Operate and PFI are getting to be more and more popular in UK.(3) A draft to extend JGS-4001-2004 "Principles for foundation designs grounded on the performance based design concept' to the earth structures are proposed. Two chapters, namely 'embankment' and 'cut slopes' are drafted in this research.