Download or read book California Seismic Retrofit Policies written by and published by DIANE Publishing. This book was released on 1993-07 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Seismic Retrofit Policies written by Cynthia A. Hoover and published by . This book was released on 1992 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book An Evaluation and Assessment of the California Seismic Safety Commission s Seismic Retrofit Practices Improvement Program written by California. Seismic Safety Commission and published by . This book was released on 2001 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Planning and Engineering Guidelines for the Seismic Retrofitting of Historic Adobe Structures written by E. Leroy Tolles and published by Getty Publications. This book was released on 2003-03-20 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt: Adobe, or mud brick, has been widely used as a building material in the American Southwest, including California. The vulnerability of many original adobe structures to damage or destruction from earthquakes has been of great concern. The guidelines presented here address the practical aspects of this problem and represent the culmination of 12 years of research and testing on the seismic retrofitting of adobe buildings. These guidelines can assist in the planning of seismic retrofitting projects consistent with both conservation principles and established public policy.

Download or read book Annual Report written by California. Seismic Safety Commission and published by . This book was released on 2000 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Earthquake hazard mitigation and earthquake insurance written by United States. Congress. House. Committee on Banking, Finance, and Urban Affairs. Subcommittee on Policy Research and Insurance and published by . This book was released on 1990 with total page 544 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book California Earthquake Authority written by California. Bureau of State Audits and published by . This book was released on 2001 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Performance Based Analytics Driven Seismic Retrofit of Woodframe Buildings written by Zhengxiang Yi and published by . This book was released on 2020 with total page 293 pages. Available in PDF, EPUB and Kindle. Book excerpt: Woodframe construction is commonly used for single and multifamily residential buildings in the United States. In many parts of California, multifamily woodframe residential buildings are constructed with open first stories, which have much less strength and stiffness compared to the ones above. In older single-family residences, the "crawl space" is constructed with unbraced and unbolted cripple walls. Both these conditions lead to a soft-story response during seismic loading, resulting significant damage, economic losses and even collapse. This type of vulnerability is often addressed through seismic retrofits, which can be mandated by local jurisdictions (e.g., the Los Angeles Soft-Story Ordinance) or incentivized by state or local entities (e.g., the California Earthquake Authority Brace and Bolt Program). A key challenge in implementing these retrofit programs (mandated or incentivized) is quantifying the improvements in performance at the individual and portfolio scale and creating design procedures that maximize the overall benefit. This research integrates nonlinear structural modeling, performance-based assessments and advanced statistical and machine learning techniques to quantify the benefit of soft-story woodframe building retrofit and develop optimal design solutions that maximize regional performance. The considered construction types include single-family houses with unbraced cripple walls developed as part of the recently completed Pacific Earthquake Engineering Research Institute (PEER) and California Earthquake Authority (CEA) project and multi-family residences with soft, weak and open front wall lines (SWOF). An end-to-end computational platform is developed to automate the construction and analysis of archetype numerical models in OpenSees and conduct seismic evaluations based on the PEER performance-based earthquake engineering framework. The performance of existing and retrofitted buildings is assessed in terms of collapse safety and direct (due to earthquake damage) economic losses. The effect of retrofit and various structural characteristics is illuminated for the single-family cripple wall houses. 2^k full factorial experiment design combined with hypothesis testing is used to identify the most influential structural properties. Two story buildings performed worse than their one-story counterparts and pre-1945 buildings performed better than pre-1955 construction. Building performance is found to be positively correlated with cripple wall heights and cripple wall retrofits provided significant overall improvements. Surrogate models are developed as a compact statistical link between key structural characteristics and seismic performance. Several machine learning algorithms are investigated for predicting the building median collapse intensity and expected annual loss using the cripple wall height, seismic weight, damping ratio and material properties as features. The XGBoost algorithm provides the most accurate prediction and on average, limits the prediction error to less than 10%. Using the well-developed machine learning models, additional sensitivity analyses are conducted and the effect of model uncertainty on collapse safety and expected annual losses is quantified using Monte Carlo simulation. For the SWOF buildings, a multi-scale cost-benefit analysis of the Los Angeles Soft-Story Ordinance Retrofit is performed. Individual buildings take an average of four to five years for the reduced earthquake losses to exceed the one-time retrofit cost. At the portfolio-scale, the average cost-benefit ratio is found to be 0.32 for the hypothetical M 7.1 Puente Hills scenario earthquake. A stochastic event-set cost-benefit assessment is also performed, where all events (approximately 8,000) that are significant to the region are considered. From this assessment, it is determined that the probability of achieving a desirable cost-benefit ratio (value between 0.0 and 1.0) within a 50-year period is approximately 0.9. Lastly, a retrofit design optimization framework is proposed with the goal of maximizing performance-based benefits at the regional scale. The methodology relies a machine learning-based surrogate model to predict seismic performances of retrofitted buildings given the design parameters. Then, a stochastic optimization algorithm is implemented to find the retrofit designs that maximize the improvement in seismic performance for the entire portfolio under a set of pre-defined constraints. The algorithmic retrofit leads to collapse losses that are comparable to the Los Angeles Ordinance guidelines while using only 60% of the resources. The performance-oriented framework is shown to address the inefficiency of conventional strength-based retrofit policies.

Download or read book Earthquakes and Old Buildings written by William Edwin Dean and published by . This book was released on 1993 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Breaking the Pattern written by Charles C. Thiel and published by . This book was released on 1991 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Earthquake Insurance In California written by Risa I. Palm and published by Routledge. This book was released on 2019-03-07 with total page 147 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on earthquake insurance for homeowners and their attitudes to the earthquake risk. It is based on a survey of California residents completed just a few months before the Lorna Prieta earthquake.

Download or read book Policy on Acceptable Levels of Earthquake Risk in State Buildings written by California. Seismic Safety Commission and published by . This book was released on 1991 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Residential Earthquake Recovery written by and published by . This book was released on 1996 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book California Earthquake Loss Reduction Plan 2002 2006 written by California. Seismic Safety Commission and published by . This book was released on 2002 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Earthquake Hazard Mitigation and Earthquake Insurance written by United States. Congress. House. Committee on Banking, Finance, and Urban Affairs. Subcommittee on Policy Research and Insurance and published by . This book was released on 1990 with total page 1108 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Seismic Rehabilitation of Existing Buildings written by American Society of Civil Engineers and published by ASCE Publications. This book was released on 2007 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt: Standard ASCE/SEI 41-06 presents the latest generation of performance-based seismic rehabilitation methodology.

Download or read book OECD Reviews of Risk Management Policies Japan 2009 Large Scale Floods and Earthquakes written by OECD and published by OECD Publishing. This book was released on 2009-02-25 with total page 279 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report looks at how Japan monitors, prepares for and responds to floods and earthquakes. It identifies good practices and areas where improvements could be made.