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

鉴于工程行业的迅速全球化，世界各地，特别是欧洲和北美，对岩土工程设计规范进行了广泛的审查，似乎最终达到了对世界各种设计规范的统一。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、欧洲规范等)的格式重写。针对这些趋势，1997年由草部修任主席的研究委员会发起了一系列活动，题为“从国际协调的角度看日本基础设计和土壤调查的现状和未来”，随后又成立了“JGS基础设计准则起草准备委员会”(由草部修主持，2000年4月至2001年3月)和“日本基础设计准则起草委员会”(由本条裕介担任主席，2001年4月至2001年3月)。在这些…期间在6年多的时间里，我们完成了以下工作：(1)审阅世界现行地基基础设计规范，并与日本现行规范进行比较。(2)审阅上述规范所采用的场地勘察方法，并与日本的做法进行比较。(3)派遣考察团前往欧洲、北美和澳新，(4)对日本岩土工程师进行问卷调查，了解设计人员如何在设计基础中选择土性参数值。(5)对日本基础设计规范的未来提出一些建议。这一想法最终导致起草了一个全面的基础设计规范，即所谓的‘Geo-Code21’，其最新草案(第2版)的英文译本已在Honjo等人(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，通过查看过程可以了解整个情况。下表中最后一个引用的IWS Kamakura。较少

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