Application of LRC Method on the Equivalent Static Wind Load of Large Span Structures
碩士 === 淡江大學 === 土木工程學系碩士班 === 99 === Since large span roof structures generally comprise lots of members to resist loads, the time history analysis for these members due to wind loads is time costly. For this reason, this main objective of this thesis is to investigate the effects of wind loads on t...
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| Format: | Others |
| Language: | zh-TW |
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2011
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| Online Access: | http://ndltd.ncl.edu.tw/handle/42367103163505125396 |
| Summary: | 碩士 === 淡江大學 === 土木工程學系碩士班 === 99 === Since large span roof structures generally comprise lots of members to resist loads, the time history analysis for these members due to wind loads is time costly. For this reason, this main objective of this thesis is to investigate the effects of wind loads on these types of structures using LRC method. The main advantages of this method are that the peak response of each member can be obtained and then the equivalent static wind loads can be generated and used for structural design. The wind pressure data used in the thesis were adopted from the wind tunnel tests for semi-circular roof structures. The data were transformed into the nodal loads in the structure and then used for the analysis. The roof structures with height-span ratios ranging from 0.2 to 0.5 are analyzed. The comparison of the peak responses of structural members obtained from LRC and time history method indicates that the difference is approximately 20%. This discrepancy is mainly due to the correlations among the large number of nodes. However, LRC is still a good method for use in the structural design.
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