哈尔滨工程大学学报
哈爾濱工程大學學報
합이빈공정대학학보
JOURNAL OF HARBIN ENGINEERING UNIVERSITY
2014年
5期
558-565
,共8页
连续梁桥%隔震桥梁%近断层地震%铅芯橡胶支座%参数优化%振动台台阵试验
連續樑橋%隔震橋樑%近斷層地震%鉛芯橡膠支座%參數優化%振動檯檯陣試驗
련속량교%격진교량%근단층지진%연심상효지좌%삼수우화%진동태태진시험
continuous girder bridge%seismic-isolated bridge%near-fault earthquake%lead rubber bearing%parame-ters optimization%shaking table array test
为了解决隔震桥梁的梁体和支座位移在近断层地震激励下易超出容许值的问题，提出了基于混合罚函数理论的隔震支座参数优化方法。以四跨铅芯橡胶支座（LRB）隔震高架连续梁桥为背景，制作了该背景的1：10缩尺模型桥，开展了模型桥振动台台阵试验。基于混合罚函数理论编制了用于优化 LRB 屈服力、初始刚度和硬化比的 MATLAB 程序，并分别对优化前后的模型桥在单条或多条地震激励下的响应进行了仿真和试验分析。结果表明：模型桥在优化前后的响应仿真值与试验值非常接近；多条地震激励下的目标函数值要比单条地震激励下的略大一些；优化后的模型桥在单条和多条地震激励下的梁体和支座位移均在容许值内，且各墩底内力均未明显增大。
為瞭解決隔震橋樑的樑體和支座位移在近斷層地震激勵下易超齣容許值的問題，提齣瞭基于混閤罰函數理論的隔震支座參數優化方法。以四跨鉛芯橡膠支座（LRB）隔震高架連續樑橋為揹景，製作瞭該揹景的1：10縮呎模型橋，開展瞭模型橋振動檯檯陣試驗。基于混閤罰函數理論編製瞭用于優化 LRB 屈服力、初始剛度和硬化比的 MATLAB 程序，併分彆對優化前後的模型橋在單條或多條地震激勵下的響應進行瞭倣真和試驗分析。結果錶明：模型橋在優化前後的響應倣真值與試驗值非常接近；多條地震激勵下的目標函數值要比單條地震激勵下的略大一些；優化後的模型橋在單條和多條地震激勵下的樑體和支座位移均在容許值內，且各墩底內力均未明顯增大。
위료해결격진교량적량체화지좌위이재근단층지진격려하역초출용허치적문제，제출료기우혼합벌함수이론적격진지좌삼수우화방법。이사과연심상효지좌（LRB）격진고가련속량교위배경，제작료해배경적1：10축척모형교，개전료모형교진동태태진시험。기우혼합벌함수이론편제료용우우화 LRB 굴복력、초시강도화경화비적 MATLAB 정서，병분별대우화전후적모형교재단조혹다조지진격려하적향응진행료방진화시험분석。결과표명：모형교재우화전후적향응방진치여시험치비상접근；다조지진격려하적목표함수치요비단조지진격려하적략대일사；우화후적모형교재단조화다조지진격려하적량체화지좌위이균재용허치내，차각돈저내력균미명현증대。
To solve the problem of girder displacement and bearing displacement of the seismic-isolated bridge tend-ing to be beyond their allowable values due to the near-fault ground motions,the seismic-isolated bearing parame-ters optimization method based on the mixed penalty function theory was proposed in this paper. Taking the four-span elevated continuous girder seismic-isolated bridge with the lead rubber bearing(LRB)as the background,the 1 / 10 scale model of this background was made,and then the shaking table array test of the model bridge was car-ried out. The MATLAB program was developed by using the mixed penalty function theory,which is used to opti-mize the LRB yield force,initial stiffness and hardening ratio,and then the seismic responses of the model bridge before and after optimization due to single-earthquake excitation and multi-earthquake excitation were obtained by simulation and test analysis,respectively. The results show that the simulation values of the seismic responses of the model bridge before and after optimization are very close to the testing values. The objective function value due to multi-earthquake excitation is slightly larger than the objective function value due to single-earthquake excitation. The optimized model bridge structural girder displacement and bearing displacement responses are all within allowed values,and the internal forces of all the pier bottoms do not increase obviously.
