{"id":null,"ids":[],"kind":"named in documents","name":"Golden Gate Bridge tower base","tied_by":"name","block":null,"release":"v0.7.1","rows_columns":["t","id","year","y","date","kind","topic","outcome","summary","tier","source","leaf","scan","addr","quote","note","title","how","g","rec","sc"],"rows":[["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:56/1",1990,1990,"","recommendation","study or report",null,"Golden Gate Bridge tower base connections · recommendation: Tower base connections shall develop strength demand of the applied load in a ductile manner","unverified","C123303273",56,"https://archive.org/details/C123303273/page/n55",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:62/1",1990,1990,"","building","study or report",null,"Golden Gate Bridge main bridge · other: Nonlinear local model of tower base and concrete pier connection","unverified","C123303273",62,"https://archive.org/details/C123303273/page/n61",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:62/2",1990,1990,"","building","study or report",null,"Golden Gate Bridge tower · other: Detailed local tower model with nonlinear filament model at base","unverified","C123303273",62,"https://archive.org/details/C123303273/page/n61",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:64/10001",1990,1990,"","building","study or report",null,"Golden Gate Bridge main tower shaft · other: 96 hold-down steel angles riveted to tower shaft web plates","unverified","C123303273",64,"https://archive.org/details/C123303273/page/n63",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:64/10002",1990,1990,"","building","study or report",null,"Golden Gate Bridge main tower shaft · other: 78 steel dowels providing positive shear connection","unverified","C123303273",64,"https://archive.org/details/C123303273/page/n63",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:65/3",1990,1990,"","building","study or report",null,"Golden Gate Bridge main tower shaft · other: hold-down angles pre-stretched to 105 kip before riveting","unverified","C123303273",65,"https://archive.org/details/C123303273/page/n64",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:65/4",1990,1990,"","finding","study or report",null,"Golden Gate Bridge tower base rivet connection · other: shear strength of 16 double-shear rivet connection","unverified","C123303273",65,"https://archive.org/details/C123303273/page/n64",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:65/5",1990,1990,"","finding","study or report",null,"Golden Gate Bridge stiffened tower web plate · other: buckling stress level of stiffened web plate (42 in. wide, 7/8 in. thick)","unverified","C123303273",65,"https://archive.org/details/C123303273/page/n64",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:65/6",1990,1990,"","finding","study or report",null,"Golden Gate Bridge hold-down steel angle group · other: yield strength of hold-down steel angle for each group of four angles","unverified","C123303273",65,"https://archive.org/details/C123303273/page/n64",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:66/1",1990,1990,"","building","study or report",null,"Golden Gate Bridge tower base connection · other: constraint axial load of 70,870 kip (tower weight and vertical cable load)","unverified","C123303273",66,"https://archive.org/details/C123303273/page/n65",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:66/2",1990,1990,"","measure","study or report",null,"Golden Gate Bridge tower base connection · other: initial elastic rotational stiffness Kz = 3,300,000,000 kip-ft/rad","unverified","C123303273",66,"https://archive.org/details/C123303273/page/n65",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:66/3",1990,1990,"","measure","study or report",null,"Golden Gate Bridge tower base connection · other: initial elastic rotational stiffness Kx = 860,000,000 kip-ft/rad","unverified","C123303273",66,"https://archive.org/details/C123303273/page/n65",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:66/4",1990,1990,"","finding","study or report",null,"Golden Gate Bridge tower base connection · finding: at base rotation of about 0.0003 rad, riveted hold-down connections sheared off and partial uplifting occurred","unverified","C123303273",66,"https://archive.org/details/C123303273/page/n65",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:66/5",1990,1990,"","finding","study or report",null,"Golden Gate Bridge tower base connection · finding: average filament compressive stress reached buckling level at base rotation of about 22 x 10-4 rad, ductility factor about 7","unverified","C123303273",66,"https://archive.org/details/C123303273/page/n65",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:66/6",1990,1990,"","finding","study or report",null,"Golden Gate Bridge tower base connection · finding: yield moment at initial rivet shear failure Mzy = 900,000 kip-ft","unverified","C123303273",66,"https://archive.org/details/C123303273/page/n65",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:66/7",1990,1990,"","finding","study or report",null,"Golden Gate Bridge tower base connection · finding: yield moment at initial rivet shear failure Mxy = 300,000 kip-ft","unverified","C123303273",66,"https://archive.org/details/C123303273/page/n65",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:71/3",1990,1990,"","finding","study or report",null,"Golden Gate Bridge tower · finding: Maximum base moment from longitudinal earthquake 2,400,000 kip-ft, above the 900,000 kip-ft base moment capacity for initial rivet shear failure","unverified","C123303273",71,"https://archive.org/details/C123303273/page/n70",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,3.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:86/2",1990,1990,"","building","study or report",null,"Golden Gate Bridge tower base shaft · other: base shaft dimension 54 ft by 33 ft","unverified","C123303273",86,"https://archive.org/details/C123303273/page/n85",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:86/3",1990,1990,"","building","study or report",null,"Golden Gate Bridge tower concrete pier · other: concrete pier dimension 90 ft by 134 ft","unverified","C123303273",86,"https://archive.org/details/C123303273/page/n85",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:86/4",1990,1990,"","finding","study or report",null,"Golden Gate Bridge tower base connection · finding: rotational ductility factor of the base section about 7","unverified","C123303273",86,"https://archive.org/details/C123303273/page/n85",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:87/1",1990,1990,"","finding","study or report",null,"Golden Gate Bridge tower · finding: Incremental nonlinear analyses were conducted to establish the degree of damage at the tower base under the maximum credible earthquake input","unverified","C123303273",87,"https://archive.org/details/C123303273/page/n86",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,3.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:89/1",1990,1990,"","finding","study or report",null,"Golden Gate Bridge tower base · finding: Shear failure of riveted hold down connections first occurred at 26% of full displacement amplitude","unverified","C123303273",89,"https://archive.org/details/C123303273/page/n88",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:89/10",1990,1990,"","finding","study or report",null,"Golden Gate Bridge tower base · finding: Rotational ductility demand at tower base about 4 under maximum credible earthquake","unverified","C123303273",89,"https://archive.org/details/C123303273/page/n88",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,3.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:89/2",1990,1990,"","finding","study or report",null,"Golden Gate Bridge tower base · finding: Rivets would fail in shear at normal tensile stress of 2.97 ksi","unverified","C123303273",89,"https://archive.org/details/C123303273/page/n88",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:89/3",1990,1990,"","finding","study or report",null,"Golden Gate Bridge tower base · finding: Maximum compressive stress in cells of the base 14.6 ksi at 26% displacement","unverified","C123303273",89,"https://archive.org/details/C123303273/page/n88",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:89/4",1990,1990,"","event","study or report",null,"Golden Gate Bridge tower base · finding: At 34% of displacement amplitude all rivet connections on southern side sheared off","unverified","C123303273",89,"https://archive.org/details/C123303273/page/n88",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:89/5",1990,1990,"","event","study or report",null,"Golden Gate Bridge tower base · finding: About one third of the base section uplifted at 34% displacement","unverified","C123303273",89,"https://archive.org/details/C123303273/page/n88",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:89/6",1990,1990,"","event","study or report",null,"Golden Gate Bridge tower base · finding: At 58% of displacement amplitude half of the base section uplifted","unverified","C123303273",89,"https://archive.org/details/C123303273/page/n88",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:89/7",1990,1990,"","finding","study or report",null,"Golden Gate Bridge tower base · finding: Maximum compressive stress in cell 23.8 ksi at 58% displacement","unverified","C123303273",89,"https://archive.org/details/C123303273/page/n88",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:89/8",1990,1990,"","finding","study or report",null,"Golden Gate Bridge tower base · finding: Maximum stress at base at full displacement amplitude 33 ksi in compression","unverified","C123303273",89,"https://archive.org/details/C123303273/page/n88",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:89/9",1990,1990,"","finding","study or report",null,"Golden Gate Bridge tower base · finding: Maximum base moment in nonlinear structure about half of linear elastic prediction","unverified","C123303273",89,"https://archive.org/details/C123303273/page/n88",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:63/2",1990,1990,"1990","building","study or report",null,"Golden Gate Bridge tower base · other: boundary spring coefficients established from nonlinear base behavior, accounting for rivet shear failure and base plate uplift","unverified","C123303273",63,"https://archive.org/details/C123303273/page/n62",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:93/1",1990,1990,"1990","finding","study or report",null,"Golden Gate Bridge tower · finding: Maximum stress at the tower base is reduced to about half of the elastic stress","unverified","C123303273",93,"https://archive.org/details/C123303273/page/n92",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:95/1",1990,1990,"1990","finding","study or report",null,"Golden Gate Bridge tower base (West Shaft) · finding: Rivet failed in shear or Base plate uplifted","unverified","C123303273",95,"https://archive.org/details/C123303273/page/n94",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:30/2",1990,1990,"December 1977","finding","study or report",null,"Golden Gate Bridge tower (Baron report review) · finding: Baron incorrectly assigned infinite moment of inertia to the 32 ft high base section of the tower","unverified","C123303273",30,"https://archive.org/details/C123303273/page/n29",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:30/3",1990,1990,"December 1977","finding","study or report",null,"Golden Gate Bridge tower (Baron report review) · finding: Baron's analysis assumes absolute fixity at tower bottom, giving a base moment of 3,916,650 ft. kip","unverified","C123303273",30,"https://archive.org/details/C123303273/page/n29",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0],["f","dl-sf-facts-v1.1-haiku55-2026-10/C123303273:30/4",1990,1990,"December 1977","finding","study or report",null,"Golden Gate Bridge tower base connection · finding: complete fixity at tower base is unrealistic because embedded angle connection has less moment capacity than assumed","unverified","C123303273",30,"https://archive.org/details/C123303273/page/n29",null,null,null,"Golden Gate Bridge seismic evaluation","n","a",0,-1.0]]}