在上下盘差异沉降作用下跨越地裂缝框架结构地震响应研究

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振动与冲击 ›› 2019, Vol. 38 ›› Issue (10) : 112-118.

论文

熊仲明1，王永玮1，陈轩1，熊威扬2

作者信息 +

Seismic responses of structures across ground fissure with different settlements between hanging wall and foot wall

XIONG Zhongming1，WANG Yongwei1，CHEN Xuan1，XIONG Weiyang2

Author information +

文章历史 +

摘要

地裂缝对结构是严重安全隐患。为研究地裂缝上下盘差异沉降及地震作用对框架结构动力响应，以西安f4地裂缝场地附近框架为研究对象，利用有限元软件ANSYS/LS-DYNA建立地裂缝场地上下盘无差异沉降与结构共同作用计算模型，将计算结果与振动台试验进行对比，表现较好一致性。通过对有限元模型施加上下盘差异沉降，定量分析了框架结构加速度、位移及位移角变化规律。计算结果表明：地震作用下，地裂缝场地框架结构各层加速度及位移大于无地裂缝场地结构加速度及位移；地裂缝上下盘差异沉降使结构加速度与位移增大；同时使结构破坏早于无沉降地裂缝场地。其研究成果为深入研究地裂缝上下盘效应对上部结构地震破坏过程和损伤机理提供参考。

Abstract

Ground fissure is a serious threat to structures.In order to analyze the seismic responses of frame structures across ground fissure with different settlements between hanging wall and foot wall under earthquake, taking a RC frame near the ground fissure f4 as a research object, a calculation model for the structure and ground fissure with and without different settlements was established by ANSYS/LS-DYNA.The calculation results present the same tendency with the results of shaking table tests.After applying different settlements to this model, the accelerations, displacements and displacement angles of the frame were quantitatively analysed.The results show that the accelerations and displacements of the frame across ground fissure are bigger than those of the frame on original ground.Different settlements increase the accelerations and displacements of the structure and make structure destroy more easily.The results provide a powerful basis to the further study on the failure mechanism of structures across ground fissures.

导出引用

熊仲明1，王永玮1，陈轩1，熊威扬2. 在上下盘差异沉降作用下跨越地裂缝框架结构地震响应研究[J]. 振动与冲击, 2019, 38(10): 112-118

XIONG Zhongming1，WANG Yongwei1，CHEN Xuan1，XIONG Weiyang2. Seismic responses of structures across ground fissure with different settlements between hanging wall and foot wall[J]. Journal of Vibration and Shock, 2019, 38(10): 112-118

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