高烈度区桥梁工程地震动参数取值分析与抗震设计

Analysis of Ground Motion Parameter Values and Aseismic Design for Bridge Engineering in High Intensity Zones

王迎法，刘朝福，何 能

Wang Yingfa, Liu Chaofu, He Neng

云南省交通规划设计研究院有限公司

Broadvision Engineering Consultants Co., Ltd.

摘要：基于小江断裂活动特点及其邻近场区地质构造背景，充分应用既有研究成果资料，探讨地震成因、分析发震条件，通过对区域内断层活动速率和工程场地基岩地震动参数值的数据信息进行汇总分析，计算出地震的加速度反应谱；并结合地震危险性分析确定桥址地震基本烈度和设计动参数值。以云南某高速公路跨越断裂带的桥梁为工程实例，对高地震烈度区桥梁抗震设计进行了分析和研究，建立了抗震计算模型，通过 E1、E2 地震作用下顺、横桥向的计算分析，确定了桥梁不同墩高的墩柱和桩基的结构尺寸、配筋量、减隔震支座的型号和参数等，并着重介绍了减震、隔震支座在抗震中发挥的作用。提出了高地震烈度区桥梁抗震设计的主要措施和控制原则，为同类区域桥梁抗震设计提供参考与借鉴。

Abstract: Based on the characteristics of the Xiaojiang fault activity and the geotectonic setting of its neighboring areas, we fully apply the existing research results to explore the causes of earthquakes and analyse the conditions of earthquake occurrence. By summarizing and analyzing the data information of the fault activity rate in the region and the ground motion parameter values of the bedrock at the project site, we calculate the acceleration response spectrum of the earthquake; and determine the basic seismic intensity and design dynamic parameter values of the bridge site by combining with the seismic hazard analysis. Take a highway in Yunnan across the bridge of the fracture zone as an engineering example. We conduct analysis and study towards the aseismic design for bridges in high seismic intensity zones,and establish the aseismic calculation model. Through the calculation and analysis of the E1 and E2 seismic action in the axial and transverse direction of bridge, we determine the structure size, amount of reinforcement, types and parameters of vibration isolation bearings for pier columns and pile foundations of different pier heights of bridges, and highlight the role played by vibration isolation bearings in earthquake resistance. We put forward the main measures and control principles of aseismic design for bridges in high seismic intensity zones, which provides references and lessons for aseismic design of bridges in similar regions.

关键词：高地震烈度区；断裂活动；公路桥梁；设计反应谱；抗震设计

Keywords: High seismic intensity zone; Fault activity; Highway bridge; Design response spectrum; Aseismic design

来源：中国知网

发表时间：2023-12-15

检索：唐沁雯

翻译：刘子若

一审：唐沁雯

二审：彭莉

三审：罗玲娟

上传发布：姜浩