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首页> 外文会议>SEAOC 2008 convention proceedings >Micro-Zoned Design Maps of Topographic Wind Effects and Exposure in the State of Hawaii Building Code
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Micro-Zoned Design Maps of Topographic Wind Effects and Exposure in the State of Hawaii Building Code

机译：夏威夷州建筑法规中地形风影响和暴露的微区设计图

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Hawaii is located within a hurricane hazard region, where the governing extreme winds are produced by rare tropical cyclones and not by regular wind climatology. In Hawaii, wind may govern the structural design in many cases, while seismic effects may dominate in others.rnTopographic amplification of wind speed has been a significant contributing factor in the past hurricane loss experiences of Hawaii. In the Hawaiian islands, where the real terrain is often very complex or characterized by large shield mountain features, the actual magnitude and extent of speed-up can be quite different from the present ASCE/SEI 7 prescriptive calculations.rnNew wind speed design mapping and technical provisions have been developed as local code amendments to the International Building Code (IBC), based on requirements of the ASCE/SEI 7-05 wind load standard. Customized wind design maps were developed from computational fluid dynamics mesoscale models, and site-specific wind-tunnel tests. The methodology accounts for: 1) specification of topographic effects factor K_(zt), 2) directionality weighting, K_d, in consideration of the probability of critical windspeed, and 3) mapping of Exposure Categories for determination of K_z exposure coefficient.rnWith the adoption of these new micro-zoned wind design maps defining customized values of ASCE/SEI 7 parameters within a Hawaii State Building Code, a uniform level of protection for hurricane hazard will be specified for the structural design of new buildings in Hawaii.
机译：夏威夷位于飓风危险区，那里的主要极端风是由稀有的热带气旋而不是由常规的气候所产生的。在夏威夷，风在许多情况下可能决定结构设计，而在其他情况下则可能占主导地位。风速的地形放大一直是夏威夷过去飓风损失经历中的重要因素。在实际地形通常非常复杂或具有大型盾构山特征的夏威夷群岛中，实际加速的幅度和程度可能与当前的ASCE / SEI 7规定性计算有很大不同。根据ASCE / SEI 7-05风荷载标准的要求，已经制定了技术规定，作为对国际建筑法规（IBC）的本地法规的修订。根据计算流体动力学中尺度模型和特定地点的风洞测试开发了定制的风设计图。该方法考虑以下因素：1）规范地形影响因子K_（zt），2）考虑临界风速的可能性确定方向权重K_d，以及3）确定暴露类别以确定K_z暴露系数.rn这些新的微区风设计图在夏威夷州建筑法规中定义了ASCE / SEI 7参数的自定义值，将为夏威夷的新建筑的结构设计指定统一的飓风危害防护等级。

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