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首页> 外文期刊>Journal of Earthquake Engineering >On Estimating the Seismic Displacement Capacity of Timber Portal-Frames
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On Estimating the Seismic Displacement Capacity of Timber Portal-Frames

机译:估计木材门架的抗震能力

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摘要

An analytical model is proposed to estimate the seismic displacement capacity, at serviceability and ultimate limit states, of timber portal frame structures with dowelled joints. The predictions from the simplified formula are compared with the results of numerical analyses carried out on a sample of representative cases. These cases result from a simulated design procedure, consistent with Eurocode 8, and are generated via Monte Carlo sampling, with varying sizes, materials and load conditions and also uncertainties in these parameters. Based on the outcome of the analysis we propose a set of practical formulas which allow prediction of the displacement with a given percentile of overestimates. In addition, it is shown that these equations for displacement capacity can be used to generate fragility curves for performance-based earthquake engineering applications. Prescription of an overstrength factor in code provisions is recommended to avoid brittle failure.
机译:提出了一个分析模型来估计具有斜缝的木材门式框架结构在使用寿命和极限状态下的地震位移能力。将简化公式的预测结果与对代表性案例进行的数值分析结果进行比较。这些情况是由符合Eurocode 8的模拟设计程序得出的,是通过蒙特卡洛采样生成的,具有不同的尺寸,材料和载荷条件,并且这些参数也存在不确定性。根据分析的结果,我们提出了一组实用的公式,这些公式可以在给定百分率高估的情况下预测位移。此外,还表明,这些位移容量方程可用于生成基于性能的地震工程应用的脆性曲线。建议在规范中规定过强度因素,以避免脆性故障。

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