（1 清华大学建筑设计研究院有限公司， 北京  100084； 2 清华大学土木工程系， 北京 100084）

［摘要］红飘带景观工程由于特殊原因，不能进行岩土工程勘察。以红飘带景观工程为例，在地基条件不明确的情况下，通过建立可靠的设计分析方法，保证结构达到所要求的可靠度。上部结构计算分析时，在支座条件设定上，恰当地体现地基刚度的不同，提高上部结构构件内力计算结果的准确度。按照工程结构可靠度理论，控制不同条件下的构件内力，使得结构总体可靠度基本一致。

［关键词］地基刚度； 支座条件； 构件内力； 可靠度

中图分类号：TU398-7文献标识码：A文章编号：1002-848X(2020)12-0129-05

Difficulty analysis of the Red Ribbon on the Tiananmen Square under unclear foundation condition

ZHANG Yizhou1, WANG Lan1, LIU Yansheng1, CHEN Jingwei1, SHI Yongjiu2, CHEN Hong1

(1 Architectural Design & Research Institute of Tsinghua University Co., Ltd., Beijing 100084, China;2 Department of Civil Engineering, Tsinghua University, Beijing 100084, China)

Abstract:The geotechnical engineering survey of the Red Ribbon could not be carried out because of special reasons. Based on this example, a reliable design analysis method was established to ensure that the structure met the required reliability with unclear foundation conditions. In the calculation and analysis of the superstructure, the stiffness of the foundation was properly reflected in the setting of the support conditions, and the accuracy of the calculation results of the internal force of the superstructure members was improved. According to the reliability theory of engineering structure, the internal force of the components under different conditions was controlled, so that the overall reliability of the structure was basically the same.

Keywords:foundation stiffness; support condition; internal force of structural member; reliability

作者简介：张一舟，硕士，高级工程师，一级注册结构工程师，Email:22373836@qq.com。