多点输入下大跨空间网格结构的拟静力位移影响因素分析

英文篇名：Effects of some parameters on pseudo-static displacement of space lattice structures under multiple support excitations
中文刊名：东南大学学报(自然科学版)
英文刊名：Journal of Southeast University (Natural Science Edition)
作者：董贺勋 ; 叶继红
英文作者：Dong Hexun Ye Jihong(1College of Civil Engineering ; Southeast University ; Nanjing 210096 ; China)(2 Jiangsu Province Textile Industry Design and Research Institute ; Nanjing 210008 ; China)
中文关键词：大跨空间网格结构 ; 拟静力位移 ; 多点水平地震输入 ; 多点竖向地震输入
英文关键词：long-span space lattice structures ; pseudo-static displacement ; multiple support horizontal excitation ; multiple support vertical excitation
出版日期：2005-08-20
机构：东南大学土木工程学院,东南大学土木工程学院南京210096,江苏省纺织工业设计研究院,南京210008 ,南京210096
年：2005
期：04
出版单位：东南大学学报(自然科学版)

摘要

根据对不同跨度(60,80,100,120m)和结构形式(柱壳、球壳、网架)的大跨空间网格结构所进行的多点输入竖向和水平地震作用的时程计算结果,总结了拟静力位移随结构跨度、视波速和自振周期的变化规律,分析了不同结构形式拟静力影响程度不同的原因.分析结果表明拟静力位移响应较大的点主要集中于支座附近,且拟静力位移的影响从支座向跨中不断减弱;视波速对拟静力位移的影响甚微;结构自振周期和结构跨度对不同类型的空间网格结构的拟静力位移影响存在差异,但变化的幅值不大;地震波的传播方向对拟静力位移分布规律没有影响.
On the basis of the time history response of space lattice structures under multiple support excitations, the rules of pseudo-static displacement development are summarized herein, which are related to structural span, apparent velocity and natural free-vibration period of structure. Moreover, the effect of structural form on pseudo-static displacement is analyzed, by which the conclusions obtained in the paper can be interpreted. The joints whose pseudo-static displacement are dominant in response are located near the support, and the effect of pseudo-static displacement on structure is decreased from edge to middle position. Apparent velocity has little effect on pseudo-static displacement, while structural span and natural free-vibration period of structure have various effects which meet the need of structural form. The directions of seismic wave have no effect on pseudo-static displacement.

引文

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