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（1 中煤科工重慶設(shè)計(jì)研究院（集團(tuán)）有限公司， 重慶 400016； 2 重慶大學(xué)土木工程學(xué)院， 重慶 400045； 3 山地城鎮(zhèn)建設(shè)與新技術(shù)教育部重點(diǎn)實(shí)驗(yàn)室， 重慶 400045； 4 中機(jī)中聯(lián)工程有限公司， 重慶 400039）

［摘要］結(jié)合某實(shí)際工程，設(shè)計(jì)11種樓蓋方案，并通過5種不同荷載工況下的人致跳躍荷載所致樓蓋豎向振動(dòng)有限元模擬分析研究，得到有關(guān)人致荷載下大跨度樓蓋結(jié)構(gòu)豎向振動(dòng)的主要結(jié)論：類共振、二分頻類共振有可能成為體育館大跨度樓蓋豎向振動(dòng)舒適度評(píng)價(jià)中的控制工況；增大樓蓋自振頻率可避免發(fā)生二分頻類共振，但調(diào)整后應(yīng)防止三分頻類共振或者其他高頻非類共振工況成為控制工況；采用峰值加速度對(duì)類共振工況下的舒適度評(píng)價(jià)較為適用，而非類共振工況下則應(yīng)同時(shí)考慮峰值加速度及其持續(xù)時(shí)間的綜合評(píng)價(jià)方法；增加梁高及增設(shè)平梁底板能有效控制大跨度樓蓋結(jié)構(gòu)在人致荷載作用下的豎向振動(dòng)，在增設(shè)平梁底板的情況下增大底板厚度的效果更為明顯，而增加樓板板厚則效果不明顯。

［關(guān)鍵詞］加速度響應(yīng)； 大跨度樓蓋； 豎向振動(dòng)； 舒適度； 共振

中圖分類號(hào)：TU378文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2020)14-0126-05

Finite element analysis of vertical vibration based on acceleration response of long-span floor system in gymnasium

XU Shitong1, HUANG Yin2,3, LI Zhegang4, HUANG Zhuwei2

(1 CCTEG Chongqing Engineering(GROUP) Co., Ltd., Chongqing 400016, China; 2 School of Civil Engineering, Chongqing University, Chongqing 400045, China; 3 Key Laboratory of New Technology for Construction of Cities in Mountain Area (Chongqing University), Ministry of Education, Chongqing 400045, China; 4 CMCU Engineering Co., Ltd., Chongqing 400039, China;）

Abstract:Combined with an actual project, 11 types of floor system were designed, and through the finite element analysis of the vertical vibration of the floor caused by the human-induced jump load under 5 different load conditions, mainly conclusions about the vertical vibration of the long-span floor structure under human-induced load were received. Pseudo-resonance and divided-by-two pseudo-resonance may become the control conditions in the comfort evaluation of the vertical vibration of the long-span floor in the gymnasium. Increasing the natural frequency of the floor can avoid the occurrence of divided-by-two pseudo-resonance, but after adjustment, the divided-by-three pseudo-resonance or other high-frequency non-pseudo-resonance conditions should be prevented from becoming control conditions. Peak acceleration is more suitable for comfort evaluation under pseudo-resonance conditions, and under non-pseudo-resonance working conditions, the comprehensive evaluation method of peak acceleration and its duration should be considered at the same time. Increasing beam height and adding bottom plate of the beam can effectively control vertical vibration of long-span floor structure under human-induced load. The effect of increasing the thickness of the bottom plate is more obvious when it is added, but the effect is not obvious when the thickness of the floor plate is increased.

Keywords:acceleration response; long-span floor; vertical vibration; comfort; resonance

*國家自然科學(xué)基金資助項(xiàng)目（51078370）。

作者簡介：徐詩童，碩士，高級(jí)工程師，一級(jí)注冊(cè)結(jié)構(gòu)工程師，Email:xushitong@cqmsy.com。