Analysis of Wind Loads Acting on Large Span Double-Arched Roof Structure with Opening Ends

2015 ◽  
Author(s):  
Li Xiaorun ◽  
Song Bo
Keyword(s):  
Wind Loads ◽  
Large Span ◽  
Roof Structure

Program for the Analysis of Wind-Induced Vibration of Steel Roof Structures

2011 ◽  
Vol 284-286 ◽  
pp. 517-522
Author(s):  
Wei Guo Yang ◽  
Yao Feng Wang
Keyword(s):  
Wind Pressure ◽  
Wind Loads ◽  
Frequency Domain Method ◽  
Large Span ◽  
Finite Element Software ◽  
Roof Structure ◽  
Wind Vibration ◽  
Vertical Winds ◽  
Wind Induced Vibration ◽  
Steel Roof

Wind loads are key considerations in the structural design of steel roof structures, especially for large span ones. The analysis of wind loads on large span steel roof structure (LSSRS) requires large amounts of calculations. Due to combined effects of horizontal and vertical winds, the wind induced vibrations of LSSRS are analyzed with the frequency domain method as the first application of the method for the analysis of wind responses of LSSRS. A program is developed to analyze the wind-induced vibrations due to a combination of wind vibration modes. The program, which predicts the wind vibration coefficient and wind pressure acting on the LSSRS, is designed with input and output interfaces to other finite element software, resulting in preferably solving the wind load analytical problem in the design of LSSRS. The effectiveness and accuracy of the proposed method and the program are verified by numerical analyses of practical projects.

AN APPROXIMATION METHOD FOR COMPUTING THE DYNAMIC RESPONSES AND EQUIVALENT STATIC WIND LOADS OF LARGE-SPAN ROOF STRUCTURES

2010 ◽  
Vol 10 (05) ◽  
pp. 1141-1165 ◽  
Author(s):  
XUANYI ZHOU ◽  
MING GU
Keyword(s):  
Coupling Effect ◽  
Coupling Factor ◽  
Dynamic Responses ◽  
Wind Loads ◽  
Inertia Force ◽  
Large Span ◽  
Load Distributions ◽  
Modal Coupling ◽  
Vibration Responses ◽  
Equivalent Static Wind Loads

Due to their sensitivity to wind, the design of large-span roofs is generally governed by wind loads. For some flexible large-span roofs with low damping and concentrated modes, the effect of multi-mode coupling should be taken into account in computing the resonant buffeting response and equivalent static wind loads. Such an effect is considered by the modified SRSS method in this paper via the modal coupling factor. Based on the same SRSS method, the equivalent static wind loads combining the mean, background, and resonant components, are computed. Particularly, the background and resonant components are computed by the LRC method and the equivalent inertia force method considering the modal coupling effects by the modified SRSS method, respectively. The method is then applied to the computation of wind-induced vibration responses and equivalent static wind load distributions of a real large-span roof. The results show that the modal coupling effect on the resonant component can be identified by the present method with high accuracy.

Study on a Large-Span Steel Truss Roof Isolation Bearings for Wind Load Effect Isolation Effect

2013 ◽  
Vol 405-408 ◽  
pp. 1022-1027
Author(s):  
Zi Fen Fang ◽  
Zhi Qiang Zhang ◽  
Fei Liu
Keyword(s):  
Financial Services ◽  
Base Isolation ◽  
Wind Load ◽  
Isolation Effect ◽  
Load Effect ◽  
Large Span ◽  
Roof Structure ◽  
Rubber Bearing ◽  
Steel Truss ◽  
Load Effects

The isolation of large-span Steel Truss Roof structure is developed on the basis of base isolation. The isolation of large-span Steel Truss Roof structure is to limit the transmission of wind load effect to the substructure. Based on the engineering background, we mainly discuss using rubber bearing isolation structure wind load effects. This paper will explains and demonstrates the isolation mechanism of Large-span Steel Truss Structure,and than test and verify isolation effect by Calculating through the analysis of wind tunnel tests conducted on the Yancheng financial services center, which the steel truss roof isolation bearings for wind load effect isolation effect.

Construction Technology of Large-Span Hybrid Structure of Suspendome with Stacked Arch in Chiping Gymnasium

2011 ◽  
Vol 243-249 ◽  
pp. 6083-6086 ◽  
Author(s):  
Xiao Bei Wang ◽  
Zhen Hua Liu ◽  
Ming Gong ◽  
Lian Fen Weng
Keyword(s):  
High Altitude ◽  
Steel Structure ◽  
Hybrid Structure ◽  
Construction Technology ◽  
Large Span ◽  
Finite Element Software ◽  
Roof Structure ◽  
Temporary Support ◽  
Stress And Deformation ◽  
Lattice Shell

Large-span hybrid structure of suspendome with stacked arch is applied into steel roof of Chiping Gymnasium. The construction of this new type structure system is difficult according to structure characteristics such as its large-span stacked arch, high installation altitude, lattice shell installation, prestressed cable tension, and tight construction period. Temporary support frame, segment lifting and high altitude splicing construction method is adopted to install the stacked arch, and total support, high-altitude spread operation method is used to install lattice dome. A spatial structural analysis is conducted on the supporting system, and the finite element software is adopted to simulate and analyze the installation process of the steel structure roof system. At the same time, stress and deformation of the roof structure are monitored by precise instruments and equipments. As the result, construction safety and quality are guaranteed.

In-situ measurement of structural performance of large-span air-supported dome under wind loads

2021 ◽  
Vol 169 ◽  
pp. 108476
Author(s):  
Yue Yin ◽  
Wujun Chen ◽  
Jianhui Hu ◽  
Bing Zhao ◽  
Qin Wang
Keyword(s):  
In Situ Measurement ◽  
Wind Loads ◽  
Structural Performance ◽  
Large Span

Field Measurements of Dynamic Characteristics and Wind-Induced Response of a Large-Span Roof Structure

2011 ◽  
Vol 243-249 ◽  
pp. 5349-5355 ◽  
Author(s):  
Ji Yang Fu ◽  
An Xu ◽  
Jiu Rong Wu
Keyword(s):  
Wind Tunnel ◽  
Dynamic Characteristics ◽  
Wind Tunnel Test ◽  
Field Measurements ◽  
Mode Shapes ◽  
Induced Response ◽  
Test Results ◽  
Large Span ◽  
Stochastic Subspace Identification ◽  
Roof Structure

This paper presents some selected results obtained from the field measurements of wind effects on Guangzhou International Sports Arena (GISA) during the passage of Typhoon Fanapi in September, 2010. The field data such as wind speed, wind direction and acceleration responses, etc., were simultaneously and continuously recorded during the typhoon. The measured acceleration data are analyzed to obtain the information on dynamic characteristics and wind-induced response of the large-span roof structure. The first four natural frequencies and vibration mode shapes of the roof are identified on the basis of the field measurements using the stochastic subspace identification (SSI) method and comparisons with those calculated from the computational model of the roof are made. The damping ratios of the roof are also identified by the SSI method and compared with those estimated by the random decrement method, and the amplitude-dependent damping characteristics are presented and discussed. Furthermore, the field measurement results are compared with the wind tunnel test results to examine the accuracy of the model test results and the adequacy of the techniques used in wind tunnel tests.

Background Response Equivalent Static Wind Load of Large-Span Roofs Based on Energy Equation

2011 ◽  
Vol 99-100 ◽  
pp. 338-341 ◽  
Author(s):  
Yu Xue Li ◽  
Qing Shan Yang ◽  
Yu Ji Tian
Keyword(s):  
Strain Energy ◽  
Energy Equation ◽  
Structural Response ◽  
Wind Load ◽  
Large Span ◽  
Roof Structure ◽  
China National Stadium ◽  
National Stadium ◽  
Equivalent Static Wind Load ◽  
Structural Strain

Based on strain energy equivalent, the background response equivalent static wind load of large span roof is derived. It solves the matter that should consider numerous structural response control objects on calculating equivalent static wind load of large span roofs, and establishes relationship with the structural strain energy introduced by fluctuant wind loads. Finally, the method is used to background equivalent static wind load analysis of China National Stadium roof structure. The results illustrate that the method proposed in this paper is effective and the precision is reliable.

scholarly journals A Study on Nonlinear Dynamic Response of the Large-Span Roof Structure with Suspended Substructure

Symmetry ◽  
2021 ◽  
Vol 13 (12) ◽  
pp. 2397
Author(s):  
Rui Pan ◽  
Baofeng Zheng ◽  
Ying Qin
Keyword(s):  
Dynamic Response ◽  
Primary Structure ◽  
Nonlinear Effect ◽  
Frequency Ratio ◽  
Internal Resonance ◽  
Structural Parameters ◽  
Secondary Resonance ◽  
Large Span ◽  
Roof Structure ◽  
Approximate Analytical Solutions

Nowadays, it is common to see large public buildings, e.g., stadiums, with some equipment or substructure suspended from the center of the roof. These substructures will tend to be larger and heavier the more gear is needed, which may have negative impacts on the dynamic performance of the roof structures. In this paper, to explore the dynamic response of a large-span roof structure with a suspended substructure, a real structure model is simplified into a two-degrees-of-freedom system. The essential consideration of nonlinear vibration is elaborated in the equations of motions. Approximate analytical solutions for free and forced vibrations are derived using perturbation methods, while numerical analysis is carried out to validate the solutions. The ratio of linear to nonlinear amplitude is proposed to represent the nonlinear effect of the primary structure, and the nonlinear effect, varying with structural parameters of frequency ratio, mass ratio, excitation ratio, and external force to the primary structure, is investigated. It is shown that internal resonance occurs when the structural frequency ratio is close to 1:2 and that secondary resonance takes place due to certain external excitations; internal resonance and secondary resonance will magnify the amplitude of the primary structure during vibration. Finally, a case of a designed practical dome with a suspended substructure is studied to verify the outcomes from the above research. According to these findings, some design proposals for this type of structure are provided.

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