A robust protocol to compute wind load coefficients of telecommunication towers and antennas using numerical simulation for risk and resilience assessment  

作　　者：Mohanad Khazaali Liyang Ma Keivan Rokneddin Matteo Mazzotti Paolo Bocchini 

机构地区：[1]Research Engineer,Extreme Event Solutions at Verisk,Lafayette City Center,Boston,MA 02111,USA [2]Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education,Harbin Institute of Technology,Harbin 150090,PR China [3]Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters of the Ministry of Industry and Information Technology,Harbin Institute of Technology,Harbin 150090,PR China [4]Senior Research Scientist,RenaissanceRe Risk Sciences,USA [5]Research Associate,P.M.Rady Department of Mechanical Engineering,University of Colorado Boulder,1111 Engineering Dr UCB 427,Boulder,CO 80309,USA [6]Professor,Dept.of Civil and Environmental Engineering,Lehigh University,117 ATLSS Dr,Bethlehem,PA 18015-4729.USA [7]Director,Catastrophe Modeling Center,Lehigh University,Bethlehem,PA,USA

出　　处：《Resilient Cities and Structures》2024年第1期66-83,共18页韧性城市与结构（英文）

基　　金：support from the Pennsylvania Department of Community&Economic Development(DCED)through grant PIT-19-02 and of Lehigh University through the“Research Futures:Major Program Development”;the“Research Fu-tures:Special Seed Funding Opportunity”grants are gratefully acknowl-edged.

摘　　要：An accurate estimation of wind loads on telecommunication towers is crucial for design,as well as for perform-ing reliability,resilience,and risk assessments.In particular,drag coefficient and interference factor are the most significant factors for wind load computations.Wind tunnel tests and computational fluid dynamics(CFD)are the most appropriate methods to estimate these parameters.While wind tunnel tests are generally preferred in practice,they require dedicated facilities and personnel,and can be expensive if multiple configurations of tower panels and antennas need to be tested under various wind directions(e.g.,fragility curve development for system resilience analysis).This paper provides a simple,robust,and easily accessible CFD protocol with widespread applicability,offering a practical solution in situations where wind tunnel testing is not feasible,such as complex tower configurations or cases where the cost of running experiments for all the tower-antennas configurations is prohibitively high.Different turbulence models,structural and fluid boundary conditions and mesh types are tested to provide a streamlined CFD modeling strategy that shows good convergence and balances accuracy,computational time,and robustness.The protocol is calibrated and validated with experimental studies available in the literature.To demonstrate the capabilities of the protocol,three lattice tower panels and antennas with different configurations are analyzed as examples.The protocol successfully estimates the drag and lateral wind loads and their coefficients under different wind directions.Noticeable differences are observed between the esti-mated wind loads with this protocol and those computed by a simple linear superposition used in most practical applications,indicating the importance of tower-antenna interaction.Also,as expected,the wind loads recom-mended by design codes overestimate the simulated results.More importantly,the telecommunication design codes inadequately identify the most favorable wind directions t

关 键 词：Generalized CFD protocol Lattice tower Tower panel Microwave antenna Wind coefficients Tower-antenna interaction 

分 类 号：TN9[电子电信—信息与通信工程]