本文選題：單層球面網(wǎng)殼 + 地震動(dòng)記錄調(diào)幅��； 參考：《哈爾濱工業(yè)大學(xué)》2014年博士論文

【摘要】：地震動(dòng)傳播至結(jié)構(gòu)場地時(shí)具有空間相關(guān)性和相干性,考慮地震動(dòng)空間相關(guān)性和相干性的多點(diǎn)輸入比一致輸入更符合實(shí)際。由于在有效的歷史地震動(dòng)記錄中很難選取到與預(yù)先定義的支座布置、震級(jí)(或烈度)和震中距等信息相匹配的數(shù)據(jù),因而需要模擬符合要求的地震動(dòng)記錄�？臻g相干性對(duì)結(jié)構(gòu)地震反應(yīng)的影響已有調(diào)查但空間相關(guān)性和相干性對(duì)單層球面網(wǎng)殼結(jié)構(gòu)地震反應(yīng)的影響還沒有研究過。此外,即使在一致輸入下,網(wǎng)殼結(jié)構(gòu)時(shí)程分析用地震動(dòng)記錄數(shù)量及其統(tǒng)計(jì)學(xué)依據(jù)還是未知的。網(wǎng)殼結(jié)構(gòu)因其具有自重輕、結(jié)構(gòu)剛度好等一系列特點(diǎn),在體育場館等建筑中獲得了大量應(yīng)用。地震是結(jié)構(gòu)服役期內(nèi)可能承受的主要?jiǎng)恿ψ饔弥?因此研究網(wǎng)殼結(jié)構(gòu)設(shè)計(jì)或校核用地震動(dòng)記錄數(shù)量以及多點(diǎn)輸入下的地震反應(yīng)是有必要的。主要研究內(nèi)容和成果如下:1、行波輸入下網(wǎng)殼結(jié)構(gòu)地震反應(yīng)的影響因素分析計(jì)算不同跨度、不同屋面質(zhì)量、不同矢跨比和不同桿件截面尺寸的無下部支承單層球面網(wǎng)殼結(jié)構(gòu)在行波輸入下和一致輸入下的地震反應(yīng),分析網(wǎng)殼結(jié)構(gòu)地震空間效應(yīng)與結(jié)構(gòu)參數(shù)和地震動(dòng)參數(shù)的關(guān)系。結(jié)果表明:地震空間變化性對(duì)網(wǎng)殼的影響程度與結(jié)構(gòu)和地震兩方面因素密切相關(guān),是否考慮地震空間變化性須由這兩方面因素綜合確定。2、隨機(jī)空間相干相關(guān)激勵(lì)作用下網(wǎng)殼結(jié)構(gòu)地震反應(yīng)分析運(yùn)用擴(kuò)展隨機(jī)點(diǎn)源法來模擬地震動(dòng)記錄,并將模擬記錄應(yīng)用于單層球面網(wǎng)殼結(jié)構(gòu),旨在調(diào)查空間相干相關(guān)多點(diǎn)輸入下結(jié)構(gòu)反應(yīng)與一致輸入的差異,評(píng)價(jià)空間相干性和空間相關(guān)性對(duì)結(jié)構(gòu)地震反應(yīng)的相對(duì)重要性,并進(jìn)而估計(jì)地震空間相關(guān)和相干的不確定性對(duì)網(wǎng)殼結(jié)構(gòu)反應(yīng)統(tǒng)計(jì)值的影響,分析結(jié)果表明,傅立葉幅值譜的空間相關(guān)性對(duì)結(jié)構(gòu)地震反應(yīng)有很大影響,同時(shí)考慮空間相干性和空間相關(guān)性是非常重要的。與空間相干相關(guān)多點(diǎn)激勵(lì)下獲得的結(jié)構(gòu)反應(yīng)相比,一致輸入會(huì)嚴(yán)重低估地震荷載效應(yīng)。3、支承剛度對(duì)空間相干相關(guān)激勵(lì)下網(wǎng)殼地震反應(yīng)的影響通過參數(shù)分析來調(diào)查空間相關(guān)性和相干性對(duì)不同剛度下部支承的網(wǎng)殼地震反應(yīng)的影響。從時(shí)程反應(yīng)中提取不同剛度下部支承結(jié)構(gòu)網(wǎng)殼的地震反應(yīng)的統(tǒng)計(jì)值,并且與一致輸入下獲得的結(jié)果比較。結(jié)果表明考慮空間相干性和相關(guān)性是重要的,特別是對(duì)于下部支承結(jié)構(gòu)剛度較大的網(wǎng)殼結(jié)構(gòu)。分析結(jié)果也說明,在空間相干相關(guān)地震激勵(lì)下,較柔的下部支承結(jié)構(gòu)可以起到一個(gè)“基礎(chǔ)隔震”系統(tǒng)的作用,從而減小在較大地震作用下結(jié)構(gòu)屈服或損傷的程度。隨著下部支承結(jié)構(gòu)剛度的增加,采用一致輸入假設(shè)對(duì)于網(wǎng)殼桿件軸力會(huì)被低估25%以上,對(duì)于柱底剪力會(huì)被低估超過100%。4、三維空間相干激勵(lì)下網(wǎng)殼結(jié)構(gòu)強(qiáng)震反應(yīng)分析基于一個(gè)現(xiàn)有相干函數(shù)模型的形式,對(duì)SMART1和LSST臺(tái)陣記錄統(tǒng)計(jì)回歸,獲得了適用于網(wǎng)殼結(jié)構(gòu)的相干函數(shù)模型。應(yīng)用該相干函數(shù)模型模擬地震動(dòng)。采用荷載域全過程分析方法,分析空間相干性對(duì)無下部支承和有下部支承的網(wǎng)殼結(jié)構(gòu)三維地震反應(yīng)的影響。分析結(jié)果表明:地震空間相干性在兩個(gè)水平方向和豎直方向上對(duì)網(wǎng)殼結(jié)構(gòu)均有不同程度的影響,同時(shí)考慮地震三個(gè)分量的空間相干性是必要的;下部支承結(jié)構(gòu)可以有效地吸收輸入地震動(dòng)的差異,從而減小了地震空間相干性對(duì)網(wǎng)殼結(jié)構(gòu)的影響。5、地震動(dòng)記錄數(shù)量和調(diào)幅對(duì)網(wǎng)殼結(jié)構(gòu)地震需求統(tǒng)計(jì)的影響對(duì)常用地震動(dòng)強(qiáng)度參數(shù)的考慮因素進(jìn)行分析,按是否考慮結(jié)構(gòu)的動(dòng)力特性將其分為地震動(dòng)絕對(duì)強(qiáng)度和地震動(dòng)相對(duì)強(qiáng)度,提出了一種可用于工程的地震動(dòng)相對(duì)強(qiáng)度參數(shù)即敏感頻率反應(yīng)譜值Sa(fp)。對(duì)由最少數(shù)量地震動(dòng)記錄獲得的單層球面網(wǎng)殼結(jié)構(gòu)反應(yīng)的統(tǒng)計(jì)值進(jìn)行評(píng)估,分析基于峰值加速度和加速度反應(yīng)譜調(diào)幅地震動(dòng)記錄對(duì)單層球面網(wǎng)殼結(jié)構(gòu)地震反應(yīng)統(tǒng)計(jì)值的影響。計(jì)算了166條地震動(dòng)記錄分量作用下網(wǎng)殼結(jié)構(gòu)的時(shí)程響應(yīng),分別考慮所有地震動(dòng)記錄和按規(guī)范標(biāo)準(zhǔn)隨機(jī)選取3條或7條記錄,獲得了網(wǎng)殼結(jié)構(gòu)桿件軸力和基底剪力的統(tǒng)計(jì)值。結(jié)果可用來建議單層球面網(wǎng)殼結(jié)構(gòu)分析或設(shè)計(jì)用地震動(dòng)記錄數(shù)量以及地震動(dòng)記錄調(diào)幅首選地震動(dòng)強(qiáng)度參數(shù)。
[Abstract]:The ground motion is spatially correlated and coherent when the ground motion is transmitted to the site. Considering the spatial correlation and the coherence of the ground motion, the multipoint input is more practical than the uniform input. It is difficult to select the data matching the information of the magnitude (or intensity) and the epicentral distance in the effective historical ground motion record. The effect of spatial coherence on structural seismic responses has been investigated, but the effect of spatial correlation and coherence on seismic responses of single-layer spherical reticulated shells has not yet been studied. In addition, the number and statistics of ground motion records for the time history analysis of the reticulated shell structure, even under uniform input Because it has a series of characteristics such as light weight and good structural stiffness, a large number of applications have been obtained in stadiums and gymnasiums. The earthquake is one of the main dynamic functions that may be subjected during the service period of the structure. Therefore, the structure design of the reticulated shell or the number of ground motion records for the reticulated shell and the earthquake under multi input are studied. The main research contents and results are as follows: 1, analysis and calculation of the influence factors of the seismic response of the reticulated shell structure under the traveling wave input, the analysis and calculation of the seismic responses of different span, different roof mass, different vector span ratio and the cross section size of a single single layer spherical reticulated shell under the line wave input and the uniform input The relation between the seismic spatial effect of the reticulated shell structure and the structural parameters and the ground motion parameters shows that the influence degree of the spatial variability of the seismic space is closely related to the two factors of the structure and the earthquake. Whether the spatial variability of the seismic space should be considered by these two factors, the.2, the latticed shell knot under the random spatial coherent correlation excitation The seismic response analysis uses the extended random point source method to simulate the seismic record, and applies the simulated record to the single layer spherical reticulated shell structure. The purpose is to investigate the difference between the structural response and the uniform input under the coherent correlation of spatial correlation, and to evaluate the relative importance of spatial coherence and spatial correlation to the structural seismic response, and then estimate the relative importance of the seismic response to the structure. The analysis results show that the spatial correlation of Fu Liye amplitude spectrum has a great influence on the structural seismic response, and it is very important to consider spatial coherence and spatial correlation. The structural response obtained under the space coherence correlation multi point excitation is very important. In contrast, the uniform input will seriously underestimate the seismic load effect.3, the influence of the support stiffness on the seismic response of the reticulated shell under the spatially coherent correlation, and investigate the effect of spatial correlation and coherence on the seismic response of the reticulated shells supported by different stiffness under the parameter analysis. The statistical value of the seismic response is compared with the results obtained under the uniform input. The results show that it is important to consider the spatial coherence and correlation, especially for the latticed shell with a larger stiffness in the lower supporting structure. The effect of the base isolation system reduces the degree of yield or damage of the structure under the larger earthquake. With the increase of the stiffness of the lower support structure, the uniform input hypothesis is underestimated for the axial force of the reticulated shell by more than 25%, and the shear of the bottom of the column will be underestimated by more than 100%.4, and the strong shock of the reticulated shell structure under three-dimensional space coherent excitation is reversed. In the form of an existing coherent function model, a coherent function model suitable for the lattice structure of SMART1 and LSST arrays is obtained. The coherent function model is used to simulate the ground motion. The full process analysis method of load domain is used to analyze the space coherence to the latticed shell with no lower support and lower support. The results show that the seismic spatial coherence has different degrees of influence on the structure of the reticulated shell in two horizontal direction and vertical direction, and it is necessary to consider the spatial coherence of the three components of the earthquake, and the lower support structure can effectively absorb the difference of the input ground motion, thus reducing the earthquake. The influence of spatial coherence on the structure of the reticulated shell.5, the influence of the number of ground motion records and the amplitude and amplitude on the seismic demand statistics of the reticulated shell structure, the factors considered for the commonly used ground vibration intensity parameters are analyzed. According to whether the dynamic characteristics of the structure are considered, it is divided into the absolute and seismic dynamic strength of the ground motion, and a kind of engineering is proposed. The relative intensity parameter of the ground motion is Sa (FP). The statistical value of the structural response of a single spherical reticulated shell obtained by the minimum number of ground motion records is evaluated. The effect of the seismic record on the seismic response of a single-layer spherical reticulated shell based on the peak acceleration and the acceleration response spectrum is analyzed. 166 The time history response of the reticulated shell structure under the action of the ground motion recording component, 3 or 7 records are randomly selected from all ground motion records and according to the standard standard. The statistical values of the axial force and the base shear of the reticulated shell structures are obtained. The results can be used to suggest the analysis of the single layer spherical reticulated shell structure and the number of ground motion records and the earthquake. The first first ground vibration intensity parameter of the dynamic recording.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級(jí)別】：博士
【學(xué)位授予年份】：2014
【分類號(hào)】：TU311.3;TU399
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本文編號(hào)：2007761