基于设计值法的结构可靠性设计实用性研究  

Practical study of structural reliability design based on design value method

作　　者：姚继涛[1,2] 王枭雄 杨成 YAO Jitao;WANG Xiaoxiong;YANG Cheng(School of Civil Engineering,Xi′an Univ.of Arch.&Tech.,Xi′an 710055,China;Key Lab of Structural Engineering and Earthquake Resistance,Ministry of Education(XAUAT),Xi′an 710055,China)

机构地区：[1]西安建筑科技大学土木工程学院,陕西西安710055 [2]西安建筑科技大学结构工程与抗震教育部重点实验室,陕西西安710055

出　　处：《西安建筑科技大学学报（自然科学版）》2024年第4期475-482,共8页Journal of Xi'an University of Architecture & Technology(Natural Science Edition)

基　　金：国家自然科学基金(51278401)。

摘　　要：目前,结构设计主要采用基于概率的分项系数法,而随着材料强度、施工工艺、设备性能的改善以及荷载作用的变化,该法在使用过程中因分项系数的取值固定而缺乏灵活性、通用性、并且可靠度控制精度不足.为此,国际上提出了设计值法.该法可从根本上解决目前设计方法的缺陷,但仍缺乏足够的工程实用性,尚未全面推广.鉴于此,根据工程设计习惯,以结构可靠度理论和设计值法为基础,建立基于设计值法的实用设计表达式,并结合工程实际给新的设计表达式选取最优的灵敏度系数,从而建立新的实用性设计值法的应用研究理论.结果表明,新的实用设计值法在工程应用中提高了可靠度控制精度和实用性.At present,the design of structures mainly adopts the probability based partial coefficient method.However,with the improvement of material strength,construction technology,equipment performance,and changes in load effects,this method lacks flexibility,universality,and reliability control accuracy due to the fixed values of partial coefficients in the application process.For this reason,the design value method is proposed internationally.The method can fundamentally solve the defects of the current design method,but it still lacks sufficient engineering practicability and has not been fully promoted.In view of this,according to the current engineering design habits,a practical design expression based on the design value method is established on the basis of the structure reliability theory and the current design value method,and the optimal sensitivity coefficients are selected for the new design expressions in combination with engineering practice,so as to establish the application research theory of the new practical design value method.The results show that the new practical design value method improves the reliability control accuracy and practicality in engineering applications.

关 键 词：分项系数法 设计值法 灵敏度系数 实用设计表达式 

分 类 号：TU318[建筑科学—结构工程]