挡块对连续梁桥板式橡胶支座隔震效果的影响研究
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摘要
文章以某不同墩高布置的典型桥例为背景,建立了考虑板式橡胶支座的双线性本构和钢筋混凝土挡块本构的非线性三维分析模型,并采用参数法分析了挡块强度对板式橡胶支座的变形、主梁横向位移和挡块性能的影响,得出挡块能有效限制主梁横向位移,且能不同程度地降低支座的横向变形;不同墩高由于其刚度及受力不同,因此对挡块强度的需求也不同。
With a typical bridge example with different pier height arrangement as the background,this article establishes a nonlinear three-dimensional analysis model considering the bilinear constitutive of plate-type rubber bearing and the constitutive structure of reinforced concrete retaining block,then,it uses the parameter method to analyze the influence of stop-block strength on the deformation of platetype rubber bearing,the lateral displacement of main beam,and the performance of stop blocks,and it is concluded that the stop block can effectively limit the lateral displacement of main beam and can reduce the lateral deformation of the bearing to varying degrees;due to its different stiffness and force,different pier heights have the different demand for the strength of stop blocks.
With a typical bridge example with different pier height arrangement as the background,this article establishes a nonlinear three-dimensional analysis model considering the bilinear constitutive of plate-type rubber bearing and the constitutive structure of reinforced concrete retaining block,then,it uses the parameter method to analyze the influence of stop-block strength on the deformation of platetype rubber bearing,the lateral displacement of main beam,and the performance of stop blocks,and it is concluded that the stop block can effectively limit the lateral displacement of main beam and can reduce the lateral deformation of the bearing to varying degrees;due to its different stiffness and force,different pier heights have the different demand for the strength of stop blocks.
引文
[1]庄卫林,刘振宇,蒋劲松.汶川大地震公路桥梁震害分析及对策[J].岩石力学与工程学报,2009,28(7):1 377-1 387.
[2]刘健新,赵国辉.“5·12”汶川地震典型桥梁震害分析[J].建筑科学与工程学报,2009,26(2):92-97.
[3]熊文林,蔡向阳.汶川大地震棉广高速桥梁震害分析[J].华中科技大学学报:城市科学版,2009,26(1):119-122.
[4]徐略勤,李建中.新型滑移挡块的设计、试验及防震效果研究[J].工程力学,2016,33(2):111-118.
[5]徐略勤,李建中.可牺牲抗震挡块的两水准设计方法研究[J].中国公路学报,2015,28(10):59-66.
[2]刘健新,赵国辉.“5·12”汶川地震典型桥梁震害分析[J].建筑科学与工程学报,2009,26(2):92-97.
[3]熊文林,蔡向阳.汶川大地震棉广高速桥梁震害分析[J].华中科技大学学报:城市科学版,2009,26(1):119-122.
[4]徐略勤,李建中.新型滑移挡块的设计、试验及防震效果研究[J].工程力学,2016,33(2):111-118.
[5]徐略勤,李建中.可牺牲抗震挡块的两水准设计方法研究[J].中国公路学报,2015,28(10):59-66.