Research on performance based geotechnical design code based on limit state design method.

鉴于工程专业的快速全球化，岩土设计规范在世界各地，特别是在欧洲和北美进行了广泛的审查，似乎最终达到了世界各地各种设计规范的协调一致。最近的趋势似乎是代码的最终版本将以极限状态设计，可靠性设计（ISO2394， Eurocodes等）和基于性能的设计（WTO/TBT等）的格式重写。观察到这些趋势，1997年由草边修担任主席的“国际协调下日本基础设计和土壤调查的现在和未来”研究委员会发起了一系列活动，随后是“JGS基础设计指南起草准备委员会”（由草边修担任主席，2000年4月至2001年3月），以及“JGS基础设计指南起草委员会”（由本条佑介担任主席）。2001年4月至今)。在这6年多的时间里，我们主要完成了以下工作：(1)回顾了国际上现行的基础设计规范，并与日本现行的基础设计规范进行了比较。(2)回顾上述规范中采用的现场调查方法，并与日本的做法进行比较。(3)派遣调查团前往欧洲、北美和澳大利亚-新西兰，与代码编写人员进行访谈，获取问题的最新信息，并在全球范围内建立信息网络。(4)对日本的岩土工程师进行问卷调查，了解设计人员在设计基础中如何选择土壤参数值。(5)对日本基础设计规范的未来发展提出建议。这个想法最终产生了一份全面的基础设计规范，被称为“地理规范21”，其最新草案（Ver.2）的英文翻译在Honjo et.al（2002）中给出。这些活动是在密切的国际合作下进行的，特别是与ISSMGE的第23技术委员会“岩土工程实践中的极限状态设计”（主席，P. Day 1998-2001， Y. Honjo 2002-2005）。在这个项目中进行的一系列研究都与上述活动有关，整个情况可以通过查看下表中最后一个参考文献IWS Kamakura的Proc来理解。少

In view of rapid globalization even in engineering profession, geotechnical design codes have been extensively reviewed in various parts of the world, especially in Europe and the North America, seemingly to arrive at eventually harmonization of the various design codes in the world. Recent trends seem that the final version of the codes are to be rewritten in a format of limit state design, reliability design (ISO2394, Eurocodes etc.) and performance based design (WTO/TBT etc.).Observing these trends, a series of the activities were initiated by a research committee entitled "Present and Future of Japanese Foundation Design and Soil Investigation in view of International Harmonization" in 1997 chaired by Osamu Kusakabe, which was followed by 'Preparation committee on drafting JGS foundation design guideline' (chaired by Osamu Kusakabe, April 2000 - March 2001), and the to 'Drafting committee on JGS foundation design guideline' (chaired by Yusuke Honjo, April 2001 - date). During these … More 6 years, we have accomplished following tasks :(1)Review the currently used foundation design codes in the world and compare them with the codes in practice in Japan.(2)Review the site investigation methods employed in the above codes and compare them with the Japanese practice.(3)Send investigation missions to Europe, North America and Australia-New Zealand, to make interviews with the code writers to obtain the most recent information on the issues and to create an information network in the world.(4)Carry out a questionnaire to geo-technical engineers in Japan to find out how the designers are selecting soil parameter values in design foundations.(5)Make some recommendations on the future of foundation design codes in Japan. This idea finally resulted to draft a comprehensive foundation design code, so called 'Geo-code 21' whose English translation of the most recent draft (Ver.2) is given in Honjo et.al (2002).These activities are carried out with close international collaborations, especially with Technical Committee 23 'Limit state design in geotechnical engineering practice' (chair, P. Day 1998-2001, Y. Honjo 2002-2005) of ISSMGE. A serious of research carried out in this project are all connected to the activities described above, and the whole picture could be understood by looking Proc. Of IWS Kamakura which is the last reference in the below list. Less