对建设工程依法进行抗震设防和地震1安全性评价工作有关问题的探讨

我国是一个地震多发、震灾严重的国家。防御与切实减轻地震灾害是我国一项长期而艰巨的任务。江泽民同志多次指出 ,要切实做好防震减灾工作 ,坚持经济建设同减灾一起抓。党和政府历来高度重视防震减灾工作 ,《防震减灾法》的颁布进一步规范了防震减灾工作的三大工作体系。并在震灾预防这一工作体系中明确提出 :“新建、扩建、改建建设工程 ,必须达到抗震设防要求。”“重大建设工程和可能发生严重次生灾害的建设工程 ,必须进行地震安全性评价 ;并根据地震安全性评价结果 ,确定抗震设防要求 ,进行抗震设防。”实践证明 ,依法加强建设工程抗震…     

建设工程必须进行抗震设防

分析了张家口市辖区和临近地区的地质构造、地震活动特点以及地震所造成的危害；论述了对建设工程进行抗震设防和地震安全性评价的重要性和必要性；阐明了将建设工程抗震设防要求和地震安全性评价管理纳入基本建设管理程序的时代性和紧迫性。     

认真贯彻防震减灾法规 不断提升城市抗震设防管理能力和水平

随着我国防震减灾法律法规的逐步健全和政府对加强公共安全的进一步重视,也给区（县）地震部门依法进行工程设防管理和地震安全性评价工作带来了新的挑战和机遇。重庆市巴南区地震局于2002年经区政府批准进入区行政审批中心,依法履行对建设工程进行抗震设防要求审批的职能,同时将地震行政审批纳入了全区建设领域基本建设管理程序中。     

浅析汶川地震后的建设工程抗震设防管理

基于汶川地震中建设工程受灾状况,对建设工程抗震设防的现状进行初步分析,对目前建设工程抗震设防工作中存在的问题及其对策进行探讨,以促进该项工作能够健康有序地向前推进。     

地震安全性评价效益评估的探讨

地震安全性评价是确定重要建设工程抗震设防要求的基础性工作. 地震安全性评价的效益问题，特别是经济效益问题一直为大家所关注．本文提出了对地震安全性评价的效益进行评估的一种模型，并举例粗略地计算了地震安全性评价的经济效益．      

重大建设工程基本自振周期估算方法探讨

在对规范和文献资料的研究和分析的基础上,本文探讨了(超)高层建筑、巨型储油罐、大跨桥梁工程等重大建设工程基本自振周期的估算方法.在工程场地地震安全性评价工作中,可采用本文提供的重大建设工程基本自振周期估算的公式.同时,本文为长周期地震动对工程结构作用的相关参数的合理确定提供了依据.     

工程场地地震安全性评价工作中两个问题的讨论

我国地震活动频度高、强度大、分布广。地震引起的建、构筑物和工程设施倒塌破坏是导致人员伤亡和经济损失的主要原因。随着我国经济快速发展,城市化进程加快,核电站、大型水电站等重大基础设施越来越多。为了最大限度地减轻地震灾害造成的损失,《中华人民共和国防震减灾法》明确规定,一般建设工程必须按照国家颁布的地震烈度区划图或者地震动参数区划图规定的抗震设防要求,进行抗震设防;新建、扩建、改建建设工程,必须达到抗震设防要求”。地震区划与地震安全性评价等工作是确定抗震设防要求的重要科学依据。承蒙工程地震界专家、学者的鼎…     

发挥政府职能促进震害预测工作——对合肥市长丰县科技局(地震工作办公室)震害预测工作的思考

介绍了合肥市长丰县科技局(地震工作办公室)在加强建设工程抗震设防要求管理过程中,如何拓展服务领域,推进震害预测工作的主要措施和做法,对市县地震主管部门加强一般建设工程抗震设防要求监管的途径进行了探讨.     

渤海海底土类动剪切模量比和阻尼比试验研究

新北油田位于渤海东北部海域内,工程场地跨度较大,沉积物为黄河冲洪积相、陆海交互相和海相不同沉积类型.本文依托新北油田海上平台工程地震安全性评价项目,对该区域钻孔土样进行了动三轴试验研究工作.该试验研究有利于加深对不同土质动力学性能的认识,可为该工程附近海域内其它海洋建设工程工作提供借鉴和参考.     

《新疆维吾尔自治区实施〈地震安全性评价管理条例〉若干规定》出台

20 0 3年 7月 3日新疆维吾尔自治区第十届人民政府第三次常务会议召开。会议讨论并通过了《新疆维吾尔自治区实施〈地震安全性评价管理条例〉若干规定》(以下简称《规定》)。 7月1 6日《规定》经自治区主席司马义铁力瓦尔地签署发布 ,并于 9月 1日正式实行。《规定》是依据《地震安全性评价管理条例》并紧密结合新疆维吾尔自治区实际情况制定的 ,其内容共 1 4条。它进一步明确了新疆维吾尔自治区行政区域内必须进行地震安全性评价的建设工程的范围 ,在《地震安全性评价管理条例》规定必须进行地震安全性评价的建设工程范围内 ,针对我区在全…     

A Monte Carlo study of rainfall forecasting with a stochastic model

A procedure for short-term rainfall forecasting in real-time is developed and a study of the role of sampling on forecast ability is conducted. Ground level rainfall fields are forecasted using a stochastic space-time rainfall model in state-space form. Updating of the rainfall field in real-time is accomplished using a distributed parameter Kalman filter to optimally combine measurement information and forecast model estimates. The influence of sampling density on forecast accuracy is evaluated using a series of a simulated rainfall events generated with the same stochastic rainfall model. Sampling was conducted at five different network spatial densities. The results quantify the influence of sampling network density on real-time rainfall field forecasting. Statistical analyses of the rainfall field residuals illustrate improvement in one hour lead time forecasts at higher measurement densities.     

Earthquake Engineering and Engineering Vibration Aims And Scope

正This journal is established by the Institute of Engineering Mechanics(IEM),China Earthquake Administration,to promote scientific exchange between Chinese and foreign scientists and engineers so as to improve the theory and practice of earthquake hazards mitigation,preparedness,and recovery.To accomplish this purpose,the journal aims to attract a balanced number of papers between Chinese and     

Foreword

Destructive earthquakes have caused great damage in China and the United States and collapsing buildings havecaused many deaths and injuries. The field of earthquake engineering studies earthquake hazards, the occurrence ofearthquakes of various magnitudes, the nature of the ground shaking during an earthquake, the vibration of structuresduring earthquakes, the strengthening of existing structures and the design of new structures to be earthquake resistant,and finally, how to cope with earthquake damage and restore a city to normal functioning. Such efforts are in progressin both countries, but unfortunately, the language barrier interferes with the free flow of information between China andthe Untied States. It would be mutually beneficial if some means could be developed to promote the exchangeof information across the Pacific Ocean. This new journal has been established for this purpose and its success willbe an important step in promoting earthquake engineering in China and the United States.     

WORLD ASSOCIATION FOR SEDIMENTATION AND EROSION RESEARCH(WASER)

正President:Giampaolo Di Silvio,Italy Vice Presidents:Ulrich C.E.Zanke,Germany Zhao-yin Wang,China The World Association for Sedimentation and Erosion Research(WASER),inaugurated on Oct.19,2004,is an independent non-governmental,non-profit organization.The mission of WASER is to promote international co-operation on the study     

Enhancing remote sensing research on global change to improve our understanding on Earth system processes

正Global Change includes climate change and other environmental changes caused by the joint interaction among various layers of Earth. From the positive side, global change provides new opportunities to human and other living forms on Earth. In the meantime, it creates tremendous challenges and negative impact. At present, the negative impacts have reached all primary processes of the global ecosystem and every aspect of human society, especially causing degradation of the ecosystem. For instance, intensive deforestation causes decline of biodiversity; global warming causes sea level rise and increases     

Dissolved Carbohydrate Concentration,Composition, and Bioavailability to Microbial Heterotrophs in Stream Water

Dissolved total carbohydrates (DTCH), dissolved free monosaccharides (DFMS), dissolved organic carbon (DOC), biodegradable DOC (BDOC), and humic substances (HS) were measured in White Clay Creek (WCC), a stream in southeastern Pennsylvania Piedmont, USA. Samples were collected over different seasons and under baseflow and stormflow conditions. DOC concentrations ranged from 1.0 to 12.8 mg/L C with the highest concentrations associated with stormflows. Carbohydrates ranged from 0.42 to 12.4 μM and accounted for 2.9 to 12.7% of the DOC. Humic substances represented the major DOC fraction, accounting for 55 to 72% of the DOC pool under all flow conditions. The humic fraction had a lower carbohydrate content (4.4%) than the non-humic fraction of DOC (7.2%). Stormflow DOC was enriched in carbohydrates relative to baseflow DOC, but the percentage of humic-C changed little. Carbohydrates were primarily present as dissolved polysaccharides (55%), but a significant fraction was bound to humic substances (40%), while a small proportion was present as monosaccharides (5%). The major monosaccharides in stream water, listed in order of decreasing concentration, included glucose, galactose, rhamnose, xylose, arabinose, mannose, and fucose. On average (30.6 ± 7.4)% (n = 44) of the stream water DOC was biodegradable, and carbohydrates accounted for 9.9 to 17.7% of the BDOC.