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工程力学  2015 

差动和波浪力激励下海床-桩-墩-桥的地震弹塑性:原理、方法、程序与智能建模

DOI: 10.6052/j.issn.1000-4750.2013.12.1148, PP. 133-140

Keywords: 跨海大桥,弹塑性,多点地震动,波浪力,水动附加质量,MEMS_c,粘弹性人工边界

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Abstract:

跨海大跨桥梁体系在地震作用下的弹塑性数值模拟涉及四个问题:1)海床(地基)-桩-墩-桥建立整体模型的合理性便捷性;2)地下地基位置多点地震动反演途径的有效性;3)波浪力和水动附加质量;4)无限域地基被有限域地基代替后,粘弹性人工透射边界及其多源性。首先,阐述并指出了有无粘弹性人工透射边界下,土-结构体系地震差动输入模型的激励输入模式的本质区别;然后,提出了一种有效的地基位置具有空间变异性的地震差动反演途径,并据此成功开发了可视化程序MEMS_c(MultipleEarthquakeMotionsSimulation_c);进而,根据小尺度结构的波浪力及其频谱特性,开发了波浪力可视化计算程序WFS(WaveForceSimulation);最后,提出了弹性人工边界条件-地基-桩-墩-结构一体化的智能快速建模途径,并开发了可视化建模工具FoundationV2013.6,给出了图解说明。该文内容具有理论基础和实用性,为后续直接服务于工程提供了具体准备。

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