Recording Program of Basic System for Seismometric Monitoring of the Technical Condition of Buildings and Structures

Problems of software development for basic seismometric monitoring of the technical condition of buildings and structures are considered. A client–server architecture is chosen for the recording program of the system. The server component provides interconnection with the equipment, data acquisition, storage, and processing. The client component provides the user (operator) interface, hardware configuration and application, and representation of system tasks and results in user-friendly form. The seismic monitoring system operates in two modes: the main one includes the isolation and recording of seismic events with assessment of their impact on a structure using the MSK-64 scale; the advanced mode provides recording of microseismic vibrations according to the schedule (specified by the operator) for monitoring the technical condition of a structure. Moreover, the system continuously records oscillations of an object. Thus, the server program writes and stores three types of files: seismic events, monitoring, and continuous recording. When a seismic event is detected or system malfunctions arise, responsible personnel are notified by e-mail and SMS according to an approved list. All operator actions, as well as system functioning events, are fixed in the message log and system log. The client program provides visualization of data on oscillations at observation sites in the form of oscillation seismograms, current signal-amplitude spectra, and vibration-level histograms from the measurement channels for a selected component. All information important for the operator (display of sensors and their status, current configuration, seismograms of corresponding measurement channels, and a list of latest messages in the system) is presented in a mnemonic diagram, which is one of the main working windows of the application. The main specific features of the program are support of different types of equipment (seismic stations), independence from the number of connected seismic stations/recorders, wide possibilities in configuring the system hardware and the application itself, the possibility of unlimited user (client) connections for browsing seismometric data, and multilanguage support.     

临沂市地震信息节点的建设与应用

市级地震信息节点是地震监测预报系统的重要组成元素,它汇集和传输地震台站的监测数据,并向省级信息节点共享地震信息,在省级信息节点与县级信息节点之间起着中间枢纽作用。对市级信息节点进行标准化改造是对地震数据分析预报的有力保障。本文通过概述临沂市地震信息节点在网络结构、软硬件设备部署、日常维护管理、安全管理等方面的标准化改造情况,为其他市级地震信息节点的升级改造提供了很好的借鉴和参考,具有一定的实用价值。     

Specific features of seismic station installation in the Arctic Region of Russia

The methodological and technical guidelines for setting up seismic event recording stations in Russia’s Far North are presented. The main types of recommended seismic instruments and data-acquisition and transmission methods are discussed.     

智能地震台站试验性研究

通过安装在台站的软硬件设备和远程测控平台,智能地震台站综合智能监控系统可以对无人职守地震台站设备的工作状态和环境进行实时监控,并能够自动判定台站故障点及发出报警信息,实现异地操作台站电源及观测设备等.试点运行结果表明,该系统运行稳定可靠,可以对台站的观测设备进行有效地保护,并极大地提升了数字地震台网中心的工作效能.     

山西数字测震台站雷击原因分析及防护措施研究

在详细分析雷电灾害特征的基础上,阐述了防雷工作的主要技术手段。分析山西数字测震台站2012年-2013年雷击灾害的成因,针对测震台站的构成特点,研究了台站综合防雷系统的设计方法,提出相应的防护技术措施。     

地震观测标准子体系研究

根据《地震行业标准体系表》(DB／T1-2000)和2002年及2004年国家科技部项目《数字化地震前兆观测技术标准》实施过程中得到的认识,运用标准体系的原理和建立标准体系的原则与方法,研究和分析了地震观测标准子体系的结构和层次划分以及地震观测专业通用标准和地震观测门类通用标准,为进一步修订地震行业标准体系表提出了建议性的结论。     

Means of synchronization of independent seismic stations in seismic arrays

Basic reasons for different kinds of failures of record synchronization of the independent seismic stations, operating as elements both of domestic and foreign seismic arrays, are established. Proceeding from it, software and hardware are proposed for ensuring reliable and precise synchronization of stations. Their operation is based on periodic fine tuning of the station’s analog-to-digital converter (ADC) sampling cycle by an exact time signal obtained from the GPS receiver. This procedure is executed with minimum or even no additional load on the controller of the seismic recorder. Such an approach allows not only matching each ADC sample to astronomical time, but also to provide simultaneous ADC sampling of all stations in the seismic array with an accuracy of 10 μs, which is especially important for solving a number of geophysical problems. Experimental researches and trial operation of the created equipment are carried out. High reliability of the equipment and compliance of technical characteristics to the purposes of the development are confirmed.     

地震台站数字化观测系统的运行与维护

随着数字技术的不断发展,我国大部分地震台站都进行了数字化改造,地震观测的现代化、数字化、智能化,对地震台站的运行环境和技术维护提出了更高的要求。本文根据在地震台站多年的工作积累和台站管理经验,对地震台数字化观测系统运行与维护的目标、基本要求作了说明,并提出了地震台数字化观测系统运行和维护的有关制度。     

汕头礐石大桥地震反应台阵建设简介

虽然大跨度斜拉桥正在被越来越多地采用,但其抗震理论和动力分析方法都尚处在探索之中．有待进一步验证和改进。汕头礐石大桥地震反应台阵的建成,为获取这类结构的地震反应数据．开展相应的研究提供了保证。从桥址的地震地质背景、台阵测点布设与设备安装、台阵的技术系统等方面的对地震反应台阵作了介绍。     

太原基准地震台高清监控系统建设

为落实安全生产工作要求,太原基准地震台急需建设一套高清视频监控系统。文章着重介绍了高清监控系统的建设思路、设计方案、系统功能,该系统可为进一步增强台站安全技防能力、解决当前地震台站安全防范问题提供技术支持,也为同类台站提供安防建设思路。     

海南广东数字地震台网联网应用

描述了利用Internet将海南、广东数字地震台网连接,组建虚拟地震台网的技术途径,比较了海南本地台网和虚拟台网地震监控能力及海南虚拟台网应用效果。结果表明,联网后,扩展了对两省交界海域的监控范围,提高了定位精度,有利于地震速报和地球物理研究。     

地下流体观测环境的评估指标干扰度

地震地下流体观测中的环境干扰问题变得越来越严重, 影响了地震监测预报的效能。 如何评估这种干扰, 更加有效地保护台站的观测环境, 是当前我国地震地下流体观测研究中的重大课题。 经过一年多的研究, 提出了评估地下流体观测环境的技术指标干扰度, 并进一步规定了水位、 水温、 水氡与水汞观测环境的允许干扰度。 干扰度是指各类干扰引起的异常变化幅度与正常时段最大变化幅度的相对百分比值。 允许干扰度的规定, 是依据各类观测得到的地震前兆异常量的大小, 一般采用异常量百分比的最小值。     

Petropavlovsk base seismic station for the tsunami warning service

Hardware and software are developed for the first base seismic station in the modernized seismic subsystem for tsunami warning on Kamchatka. The station is formed as a seismic array. The structure of the equipment and its communication systems are described. The station is introduced into experimental operation. The first results of recording of a local strong earthquake at points of the Petropavlovsk station are discussed.     

肥东地震台地电阻率观测场地勘选

按照《地震及前兆数字观测技术规范》和《地震台站观测环境技术要求(第二部分,电磁观测)》(GB/T 19531.2-2004),对安徽省肥东地震台地电阻率观测场地进行了勘选,采用十字电测深法勘探地下介质的电性结构分布情况,并对观测环境进行电磁骚扰测试,经过对测量结果进行计算和初步分析处理后,认为该场地适合地电阻率台站建设...     

流域化数字水库地震台网监测系统

雅砻江数字水库地震台网技术系统按照流域化建设和运行模式,以科学合理的测震台站布设、多样化及时通信组网方式和现代化台网中心,构成一个台站流域化布局、地震数据传输通信方式多元化、监测成果实时共享的水库地震监测系统,为工程安全监测和区域防震减灾及相关研究工作提供准确详实的基础资料,并为同类工程及大规模水库地震台网的设计和建设提供参考依据。     

江苏省地震台站巡检系统架构

地震台站是开展地震观测和地震科学研究的基层机构,台站运行和维护关系到地震数据质量。以江苏省地震台站巡检系统为研究对象,提出一种基于TOGAF的地震台站巡检系统架构,探索适合台站巡检的业务构架、数据架构、应用架构和技术架构,并给出地震台站巡检系统总体架构。该架构能够有效整合现有地震台站巡检系统应用,降低地震台站管理信息化建模难度,提高信息化架构规划和实施的可行性。     

云平台下地震监测台网软件系统的应用方案研究

针对数字化地震台网JOPENS软件系统的技术特点及功能需求,在对当前各种主流云计算平台进行比较的基础上,基于较为合适的阿里云计算平台,提出了在云环境下部署JOPENS系统的应用方案。测试结果表明JOPENS系统部署在云环境下能够提升测震台网中心运行的稳定性及可扩展性,并节约运行维护成本。该研究对于当前三网融合新形势下云南省地震台网的建设及运行工作具有借鉴意义。     

青海省新增地震台波形数据质量评价

为了进一步提升青藏高原地震监测能力,中国地震局在青海、西藏和新疆3个地区建设地震台站。为确保高质量产出地震数据,以青海地区新增16个地震台站为例,围绕观测数据的完整性和可靠性,基于数据连续率、台基噪声水平和事件波形记录质量,对地震观测数据质量进行评价,结果发现：青海地区新增地震台站观测环境较好,总体运行稳定,数据连续率较高,适合进行宽频带数字地震观测;地震台站空间分布更加均匀,青海省中西部地区理论地震监测能力从约M_S 4.5提升到M_S 2.0,地震监测能力提升。本项工作的开展,为我国青藏高原地震监测能力提升提供了业务化支撑。     

Intelligence-Aided Seismic Zonation System IASHES

In this paper,the structure of the intelligence-aided seismic zonation system IASHES and its validation are briefly introduced.Emphasis is placed on the two rank scheme of potential seismic source areas; an expert subsystem for estimating the seismicity trends of rank A source areas; an expert subsystem for delineation of rank B source areas; an expert subsystem for judgment of upper limit of magnitude of rank B source areas,and an improved procedure for determination of weighting factors of rank B source areas,which is specially suitable to ES(Expert systems).     

Three-dimensional nonlinear analysis for seismic soil–pile-structure interaction

A three-dimensional method of analysis is presented for the seismic response of structures constructed on pile foundations. An analysis is formulated in the time domain and the effects of material nonlinearity of soil on the seismic response are investigated. A subsystem model consisting of a structure subsystem and a pile-foundation subsystem is used. Seismic response of the system is found using a successive-coupling incremental solution scheme. Both subsystems are assumed to be coupled at each time step. Material nonlinearity is accounted for by incorporating an advanced plasticity-based soil model, HiSS, in the finite element formulation. Both single piles and pile groups are considered and the effects of kinematic and inertial interaction on seismic response are investigated while considering harmonic and transient excitations. It is seen that nonlinearity significantly affects seismic response of pile foundations as well as that of structures. Effects of nonlinearity on response are dependent on the frequency of excitation with nonlinearity causing an increase in response at low frequencies of excitation.