| Author Name | Affiliation | | Rui Dong | College of Civil Engineering, Fuzhou University, Fuzhou 350108, China
State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China | | Yaojun Ge | State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China | | Lin Zhao | State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China | | Jiangang Wei | College of Civil Engineering, Fuzhou University, Fuzhou 350108, China
School of Civil Engineering, Fujian University of Technology, Fuzhou 350118, China |
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| Abstract: |
| According to the relationship between load and response, the equivalent static wind load (ESWL) of a structure can be estimated by load-response correlation (LRC) method, which can be accurately used to estimate the background ESWL of a structure. The derivation of the classical expression of LRC formula is based on a specific command response at a critical position, and the ESWL distribution has only one form in this case. In this paper, a general expression of LRC formula is derived based on a specific command response at all positions. For the general expression, ESWLs can be expressed by load-response correlation coefficients, response-response correlation coefficients, RMS values of the fluctuating wind loads, and peak factor in the form of matrices. By comparing the expressions of LRC method, it was found that the classical expression was only one form of the general one. The general expression which introduces the response-response correlation coefficients provided more options for structural engineers to estimate ESWLs and offered further insights into the LRC method. Finally, a cable-stayed bridge, a rigid three span continuous girder bridge, and a suspension bridge were used to verify the correctness of the general expression of LRC method. |
| Key words: bridges equivalent static wind load load-response correlation method background response general expression load-response correlation coefficient response-response correlation coefficient |
| DOI：10.11916/j.issn.1005-9113.19071 |
| Clc Number:U441+.2 |
| Fund: |
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| Descriptions in Chinese: |
| 桥梁等效静力风荷载广义荷载-响应相关法 董锐1,2，葛耀君2，赵林2，韦建刚1,3 （1.福州大学 土木工程学院，福州350108； 2.同济大学 土木工程防灾国家重点实验室，上海 200092； 3.福建工程学院 土木工程学院， 福州 350118） 摘要：根据荷载和响应之间的关系，结构的等效静力风荷载可采用荷载-响应相关法，即LRC（Load-response correlation）法计算。LRC法是计算结构背景响应等效静力风荷载的精确方法。LRC法经典表达式根据结构某一关键位置处的某一关心响应推导得到，并且具有唯一性。本文根据结构全部位置处的某一关心响应推导得到LRC法广义表达式，并将结构的等效静力风荷载以矩阵的形式表达为荷载-响应相关系数、响应-响应相关系数、脉动风荷载RMS值和峰值因子的乘积。与LRC法广义表达式相比较，经典表达式是广义表达式的一种特例。LRC法广义表达式引入了响应-响应相关系数，为结构工程师计算等效静力风荷载提供了更多的选择，同时对LRC法的本质有了更深入的认识。最后，分别以斜拉桥、三跨连续梁桥和悬索桥为例验证了LRC法广义表达式的正确性。 关键词：桥梁；等效静力风荷载；荷载-响应相关法；背景响应；广义表达式；荷载-响应相关系数；响应-响应相关系数 |
