【摘要】：為探討某在役鋼筋混凝土冷卻塔結(jié)構(gòu)不同部位的地震易損性,通過數(shù)值模擬進(jìn)行分析.應(yīng)用ABAQUS軟件建立分析模型,根據(jù)結(jié)構(gòu)所在場地選擇一系列合理的地震動(dòng)記錄并對(duì)結(jié)構(gòu)進(jìn)行增量動(dòng)力分析;選取了材料應(yīng)變和地面峰值加速度作為結(jié)構(gòu)地震需求參數(shù)和強(qiáng)度參數(shù),將結(jié)構(gòu)沿高度方向分為13個(gè)區(qū)域,并將結(jié)構(gòu)的破壞狀態(tài)劃分為5個(gè)等級(jí);在結(jié)構(gòu)底部分別輸入單向、水平雙向和三向地震作用,對(duì)所得結(jié)構(gòu)響應(yīng)進(jìn)行回歸分析并建立概率地震需求模型,最終得到結(jié)構(gòu)沿高度方向的區(qū)域易損性曲線.分析結(jié)果表明:上部塔筒的損傷概率較小,人字柱的損傷概率明顯大于結(jié)構(gòu)的其他部分;結(jié)構(gòu)底部的人字支柱是結(jié)構(gòu)的最薄弱部位,可根據(jù)需要對(duì)其進(jìn)行加固,而塔筒的抗震性能優(yōu)異.
[Abstract]:In order to investigate the seismic vulnerability of a reinforced concrete cooling tower structure in service, the seismic vulnerability was analyzed by numerical simulation. The ABAQUS software is used to set up the analysis model and select a series of reasonable ground motion records according to the site where the structure is located and carry on the incremental dynamic analysis to the structure. Material strain and ground peak acceleration are selected as seismic demand and strength parameters of the structure. The structure is divided into 13 regions along the direction of height, and the failure state of the structure is divided into 5 grades. In this paper, unidirectional, horizontal bi-directional and three-way seismic action are inputted into the bottom of the structure respectively, and the response of the structure is analyzed by regression analysis and the probabilistic seismic demand model is established. Finally, the regional vulnerability curve of the structure along the direction of height is obtained. The results show that the damage probability of the upper tower is small, and the damage probability of the herringbone column is obviously higher than that of the other parts of the structure. The herringbone pillar at the bottom of the structure is the weakest part of the structure, which can be strengthened according to the need, and the seismic performance of the tower tube is excellent.
【作者單位】： 北京交通大學(xué)土木建筑工程學(xué)院;
【基金】：國家自然科學(xué)基金面上項(xiàng)目(51478033,51678039)
【分類號(hào)】：TU311.3
，

本文編號(hào)：2431795