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中文摘要：
为精细模拟钢筋混凝土桥墩的非线性动力行为,基于钢筋混凝土纤维梁柱单元实用模拟分析平台FENAP,研究了结合纤维梁柱单元与有限元软件ABAQUS进行非线性动力分析的原理,推导了动力分析过程,并开发了FENAP平台的非线性动力分析模块.应用该模块分别模拟了钢筋混凝土桥墩在单向地震激励下的数值试验和钢筋混凝土桥墩在双向地震激励下的振动台试验.结果表明,基于FENAP平台所开发的非线性动力分析模块,可有效模拟钢筋混凝土桥墩的复杂非线性行为,可考虑双向弯矩和轴力的耦合作用,且求解精度和计算效率较高,为长大桥梁结构的地震灾变过程模拟提供了一种实用分析手段.
英文摘要：
In order to simulate nonlinear dynamic behavior of reinforced concrete （RC） bridge piers finely, based on FENAP simulation platform for RC fiber beam-column element, a principle of nonlinear dynamics was studied, which combined fiber beam-column element and ABAQUS finite element software. A process of dynamic analysis was derived and a nonlinear dynamic analysis module of the FENAP simulation platform was developed. A numerical test of a RC bridge pier under unilateral seismic excitation and a shaking table test ofa RC bridge pier under bilateral seismic excitations were simulated using the developed module of FENAP. The results indicate that on the developed nonlinear dynamic analysis module of FENAP, complicated nonlinear dynamic behavior of RC bridge piers with coupling effect of bilateral bending moments and axial force may be simulated effectively. The solution accuracy and computational efficiency are higher. This module provides a practical method to simulate seismic disaster evolution process of large bridges.
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