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Grouping response method for equivalent static wind loads based on a modified LRC method 被引量:9
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作者 Zhou Xuanyi Gu Ming Li Gang 《Earthquake Engineering and Engineering Vibration》 SCIE EI CSCD 2012年第1期107-119,共13页
Wind loading is one of the most important loads for controlling the design of large-span roof structures. Equivalent static wind loads, which can generally aim at determining a specific response, are widely used by st... Wind loading is one of the most important loads for controlling the design of large-span roof structures. Equivalent static wind loads, which can generally aim at determining a specific response, are widely used by structural designers. A method for equivalent static wind loads applicable to multi-responses is proposed in this paper. A modified load- response-correlation (LRC) method corresponding to a particular peak response is presented, and the similarity algorithm implemented for the group response is described. The main idea of the algorithm is that two responses can be put into one group if the value of one response is close to that of the other response, when the structure is subjected to equivalent static wind loads aiming at the other response. Based on the modified LRC, the grouping response method is put forward to construct equivalent static wind loading. This technique can simultaneously reproduce peak responses for some grouped responses. To verify its computational accuracy, the method is applied to an actual large-span roof structure. Calculation results show that when the similarity of responses in the same group is high, equivalent static wind loads with high accuracy and reasonable magnitude of equivalent static wind distribution can be achieved. 展开更多
关键词 large-span roof equivalent static wind loads modified LRC method grouping response similarityalgorithm
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General Expression of LRC Method in Estimation of Bridge’s Equivalent Static Wind Load
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作者 Rui Dong Yaojun Ge +1 位作者 Lin Zhao Jiangang Wei 《Journal of Harbin Institute of Technology(New Series)》 CAS 2021年第3期28-44,共17页
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 bac... 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. 展开更多
关键词 BRIDGES equivalent static wind load load-response correlation method background response general expression load-response correlation coefficient response-response correlation coefficient
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A new framework for evaluating along-wind responses of a transmission tower 被引量:3
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作者 Liu Guohuan and Li Hongnan School of Civil and Hydraulic Engineering, Dalian University of Technology, Dalian 116023, China PhD Professor 《Earthquake Engineering and Engineering Vibration》 SCIE EI CSCD 2009年第1期87-93,共7页
In this paper, an analytical framework to evaluate the along-wind-induced dynamic responses of a transmission tower is presented. Two analytical models and a new method are developed: (1) a higher mode generalized ... In this paper, an analytical framework to evaluate the along-wind-induced dynamic responses of a transmission tower is presented. Two analytical models and a new method are developed: (1) a higher mode generalized force spectrum (GFS) model of the transmission tower is deduced; (2) an analytical model that includes the contributions of the higher modes is further derived as a rational algebraic formula to estimate the structural displacement response; and (3) a new approach, applying load with displacement (ALD) instead of force, to solve the internal force of transmission tower is given. Unlike conventional methods, the ALD method can avoid calculating equivalent static wind loads (ESWLs). Finally, a transmission tower structure is used as a numerical example to verify the feasibility and accuracy of the ALD method. 展开更多
关键词 along-wind-induced dynamic responses transmission tower generalized force spectrum equivalent static wind loads
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Distribution of background equivalent static wind load on high-rise buildings
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作者 Jianguo ZHANG Ming GU 《Frontiers of Structural and Civil Engineering》 SCIE EI 2009年第3期241-248,共8页
In this paper,the along-wind and cross-wind fluctuating load distributions along the height of high-rise buildings and their correlations are obtained through simultaneous pressure measurements in a wind tunnel.Some t... In this paper,the along-wind and cross-wind fluctuating load distributions along the height of high-rise buildings and their correlations are obtained through simultaneous pressure measurements in a wind tunnel.Some typical methods proposed in some relative litera-tures,i.e.,load-response correlation(LRC),and quasi-mean load(QML)and gust load envelope(GLE)methods,are verified in terms of their accuracy in describing the background equivalent static wind load distribution on high-rise buildings.Based on the results,formulae of the distribution of background equivalent static load on high-rise buildings with typical shapes are put forward.It is shown that these formulae are of high accuracy and practical use. 展开更多
关键词 high-rise buildings ALONG-wind cross-wind background equivalent static wind load close formulae
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