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考虑建筑不规则性的适度精细化区域震害模拟方法

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  • 国家科技期刊平台
  • NETL
  • NSTL
  • 万方数据
目前,区域中存在大量的体型不规则建筑,在遭受地震作用时会产生平扭耦联效应,导致损伤加重.然而,现阶段的区域震害模拟方法以二维层间模型为主,难以考虑建筑结构的空间不规则特性.而精细化有限元模拟方法不适用于量大面广且数据模糊程度高的区域建筑震害模拟.为此,提出考虑建筑结构不规则特性且适用于区域尺度建筑群震害模拟的适度精细化高效分析方法.建立能够模拟楼层内抗侧刚度平面不规则特性的适度精细化层单元模型,通过不同层单元的串联组合实现对结构竖向不规则特性的模拟.考虑到区域建筑数量庞大,提出了两级加速动力分析方法,以减少震害模拟计算耗时,该方法在单体结构层级构建结构的摄动式隔离非线性动力控制方程提升震害模拟计算效率,进一步结合OpenMP并行方法开展区域震害模拟,实现整体层级的计算效率加速.数值算例及某区域震害模拟表明,所提方法有可靠的准确性和高效性,并且不规则结构的平扭耦联效应会导致区域建筑的震害损伤加重.
A moderately refined regional seismic damage simulation method considering building irregularity
At present,there are a large number of irregular buildings in region which will have lateral-torsional coupling effect when subjected to earthquake actions resulting in serious damage.However,current seismic damage simulation methods are mainly based on two-dimensional inter-story models,which do not take into account the spatial irregularity of buildings.In addition,the refined finite element simulation methods are unsuitable for the simulation of large number of buildings with high degree of data ambiguity.This paper proposes a moderately refined and efficient analysis method which considers the irregular characteristics of structures and is suitable for regional scale seismic damage simulation of building groups.A moderately-refined-layer-element(MRLE)model is established to simulate the lateral stiffness irregularities in layer level,and the vertical irregularities of the structure are simulated by combining different layer elements in series.Considering the large number of buildings in region,a two-level accelerated dynamic analysis method is proposed to reduce computation time for seismic damage simulation.At the single structure level,a perturbation inelasticity-separated nonlinear dynamic control equation of structure is constructed to improve the efficiency of seismic damage simulation.Furthermore,the OpenMP parallel method is used to simulate the seismic damage of regional buildings,and the computational efficiency of the regional level is accelerated.The numerical calculations and a regional seismic damage simulation show that the proposed method is reliably accurate and efficient,and that the lateral-torsional coupling effects of irregular structures lead to increased damage in regional building seismic damage.

irregular buildinglateral-torsional coupling effectmoderately-refined-layer-elementtwo-level accelerated dynamic analysis methodregional seismic damage simulation

陈文越、余丁浩、李钢

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大连理工大学海岸和近海工程国家重点实验室,辽宁大连 116024

不规则建筑 平扭耦联效应 适度精细化层单元 两级加速动力分析方法 区域震害模拟

国家自然科学基金国家自然科学基金辽宁省博士科研启动基金

52225804520080752022-BS-089

2024

10.14006/j.jzjgxb.2023.0374

建筑结构学报
中国建筑学会

建筑结构学报

CSTPCD北大核心
影响因子：1.546
ISSN：1000-6869
年,卷(期)：2024.45(6)